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deomsh

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Everything posted by deomsh

  1. deomsh
    Has to do with the so called "System Arena" in win9x memory architecture. Since vcache is using it too, sometimes smalller is better. See https://www.pc-experience.de/wbb2/thread.php?threadid=1903 In *some* win95 KB (cannot find it anymore) MaxFileCache=8192 is mentioned as value to solve stability problems. If MinFileCache is not set, MaxFileCache should > 1/24 of memory (RLoew's Rule of Thumb - he didn't mention MinFileCache needed). According to my experimental findings lower values are possible, but always MinFileCache <= MaxFileCache. In my "Smartdrive Revisited"-investigations I found a vcache of value 1024 (=1MB) as "best" (not related to win98 Setup, but to some problems using a win3.1 HD audio driver). In my USB-project the extreme low vcache value has especially the purpose to minimize System Arena footprint if Win98se is running on a Memdrive. My standard Win98se Setup values, set in SYSTEM.INI after copying files: [386Enh] MaxPhysPage=20000 ConservativeSwapfileUsage=1 DMABufferSize=64 [vcache] MinFileCache=1024 MaxFileCache=1024
  2. deomsh
    Hm, the Bios Setup of your GA board doesn't look very promising. I assume you run the SATA ssd in IDE mode. And what about the extreme low vcache settings I mentioned in my USB project? If *something* is mapped in memory you can try Jack Ellis XMGR.SYS instead of HIMEMX.EXE (who gave you already an extra reboot).
  3. deomsh
    Sometimes Opera's kiosk mode is helpfull in case of msfn. Looks same as in my Android smartphone.
  4. deomsh
    I agree that memory problem can be unsolvable. Once I tried (from USB drive) MS-DOS7.1 on a Gigabyte board, if I remember well a Z170 species. Didn't work! I am a happy user of my 2010 Asrock 960GM-GS3 AM3+ board (with FX 6100/DDR3 1600), compatible with everything except Win98se ACPI.
  5. deomsh
    I should have written "install W9x without PCI-bus first, if succesfull try your luck with wizard New Hardware." After installing the PCI bus and reboot once you will have full control which Device to install and which not. Do not reboot after installing PCI devices, first check Device Manager (view Connection) for double entrances. Especially the non-PCI VGA device should be deleted manually before reboot. But you have already red my "Exploring SETUP /P I;S=detectbus......"-Members project. The /P S= switch is very badly documented. All entrances in MSDET.INF can be used to skip during installation (seperated with , ).
  6. deomsh
    You should try SETUP /P I;S=detectbus to install W9x without PCI-bus.
  7. deomsh
    I know about set /a and set /A, but I am not so far with the "%" and" ~%"-"thing". I am happy with my simple if-statement in the case you mentioned, but I am afraid I will have to use the more advanced methods I want to read out Number of Heads from the MBR, adding 1 and convert to \X..-byte values to be able to use write to write the value directly in the Boot sector. Not to speak from Sectors/track with 6-bits value in the mixed Cylinder-Sectors/track-byte. That's the main reason I choose one batch file. It´s partition alignment to cylinders as far as I understand this subject (see error 108 in https://www.win.tue.nl/~aeb/partitions/partition_types-2.html ). I don´t think it´s a bug and it should only be a problem in very rare cases AND if one wants to use Partition Magic (in my case for error check, the program cannot be used to partition Grub4Dos disk in memory because of the stupid reboot feature). In following text I compare the output of Partinfo. The first is the example you was so kind to give me in your post of januari 31. Th second is the result of repartitioning the same drive in memory with Fdisk. Ther third is the output of my batch. The maximum disksize is 256 MB, like in your example. PARTINFO.EXE in case of partnew ===================================================================== Disk 0: 261 Cylinders, 32 Heads, 63 Sectors/Track. The BIOS supports INT 13h extensions for this drive. ========================== Partition Tables ========================= Partition -----Begin---- ------End----- Start Num Sector # Boot Cyl Head Sect FS Cyl Head Sect Sect Sects --------- - ---- ---- ---- ---- -- ---- ---- ---- --------- --------- 0 0 80 0 1 1 06 260 2 2 63 524225 Error #108: Partition didn't end on cylinder boundary. ucEndHead expected to be 31, not 2. Error #108: Partition didn't end on cylinder boundary. ucEndSector expected to be 63, not 2. ============================================================================== Disk 0: 256.9 Megabytes ============================ Partition Information =========================== Volume Partition Partition Start Total Letter:Label Type Status Size MB Sector # Sector Sectors ------------- --------------- -------- ------- --------- - --------- --------- FAT16B Pri,Boot 256.0 0 0 63 524225 ---------------------------------------------------------------------------------------------- PARTINFO.EXE in case of FDISK ===================================================================== Disk 0: 261 Cylinders, 32 Heads, 63 Sectors/Track. The BIOS supports INT 13h extensions for this drive. ========================== Partition Tables ========================= Partition -----Begin---- ------End----- Start Num Sector # Boot Cyl Head Sect FS Cyl Head Sect Sect Sects --------- - ---- ---- ---- ---- -- ---- ---- ---- --------- --------- 0 0 80 0 1 1 06 259 31 63 63 524097 ============================================================================== Disk 0: 256.9 Megabytes ============================ Partition Information =========================== Volume Partition Partition Start Total Letter:Label Type Status Size MB Sector # Sector Sectors ------------- --------------- -------- ------- --------- - --------- --------- FAT16B Pri,Boot 255.9 0 0 63 524097 Free Space Pri 1.0 None - 524160 2016 ---------------------------------------------------------------------------------------------- PARTINFO.EXE in case of rd2hdfat16.g4b (using 32 instead of 16 Heads in case of 256MB) ===================================================================== Disk 0: 260 Cylinders, 32 Heads, 63 Sectors/Track. The BIOS supports INT 13h extensions for this drive. ========================== Partition Tables ========================= Partition -----Begin---- ------End----- Start Num Sector # Boot Cyl Head Sect FS Cyl Head Sect Sect Sects --------- - ---- ---- ---- ---- -- ---- ---- ---- --------- --------- 0 0 80 0 1 1 06 259 31 63 63 524097 ============================================================================== Disk 0: 255.9 Megabytes ============================ Partition Information =========================== Volume Partition Partition Start Total Letter:Label Type Status Size MB Sector # Sector Sectors ------------- --------------- -------- ------- --------- - --------- --------- C:NO NAME FAT16B Pri,Boot 255.9 0 0 63 524097 Thanks to Grub4Dos simple integer calculator I had an easy job to adjust the given the given disksize (in MB) to multiples of Heads * Sectors/track. I know it's some number calculated of date/time while formatting. But for a Memdrive Volume ID I thought it's not realy needed and to be too much work. Or am I wrong? My next purpose is rd2hdf32.g4b.
  8. deomsh
    After the problems with the DOSBox images, I used Jaclaz' guidelines to make a Hard disk from a Grub4Dos Ramdrive. It seems that Partnew doesn't write to cylinder boundaries. Although Windows 98SE Setup doesn't complain, my MS-DOS util's do. So I wrote a correction in a Grub4Dos batch file. Since the Grub Util FAT seems only good for floppies, I wrote some batch lines to format the drive to FAT16 too. It's al in ONE file. Will make and format ALWAYS (hd0,0), first attached real hdd will be mapped to last hd. --------------------------------------------------------------------------------------------------------------------------- rd2hdf16.g4b --------------------------------------------------------------------------------------------------------------------------- !BAT # Make FAT16 hdd-image: active first partition; range 33-2047 MB debug off set /a SIZE=%1 if %SIZE%=="" && goto :validate if %SIZE%>=2048 && goto :validate if %SIZE%<=32 && goto :validate goto :makeimg :asksize set /a SIZE= echo Disk size in range 33-2047, integer numbers only echo Actual image size will be adjusted to cylinder boundaries! set /p:60 /a SIZE=Enter disk size and press ENTER in 60 seconds: if %SIZE%=="" && goto :validate if %SIZE%>=2048 && goto :validate if %SIZE%<=32 && goto :validate goto :makeimg :validate echo Input is not a valid number, try again set /p:60 CONTINUE=Try again? choose Y or N and press ENTER: if /I "%CONTINUE%"=="Y" && goto :asksize goto :eof :makeimg if %SIZE%<=2047 && set /a heads=128 if %SIZE%<=2016 && set /a heads=64 if %SIZE%<=1008 && set /a heads=32 if %SIZE%<=504 && set /a heads=16 set /a sectmax=%SIZE% * 2048 set /a sectrack=63 set /a secthidd=63 set /a cylinder=%sectmax% / %heads% / %sectrack% set /a sectbal=%cylinder% * %heads% * %sectrack% set /a sectpart=%sectbal% - %secthidd% set /a rdsize=%sectbal% * 512 # Set rdbase >=50MB. Be aware: Grub4Dos can write the batchfile to (rd) set rdbase=52428800 set /A partid=0x06 map --rd-base=%rdbase% map --rd-size=%rdsize% map --unsafe-boot --heads=%heads% --sectors-per-track=%sectrack% (rd)+1 (hd0) map --hook partnew --active (hd0,0) %partid% %secthidd% %sectpart% # Create FAT16 on (hd0,0) rootnoverify (hd0,0) set jump=xEB\x3C\x90 set oemname=GRUB4DOS set bytpersec=x00\x02 # Set sectors/cluster according to win95 standards set /a ptstart=*0x82A8 set /a ptlength=*0x82B0 set /a disksize=%ptlength% * 512 if %disksize%<=2147483648 && set secclust=x40 if %disksize%<=1073741824 && set secclust=x20 if %disksize%<=536870912 && set secclust=x10 if %disksize%<=268435456 && set secclust=x08 if %disksize%<=134217728 && set secclust=x04 # if %disksize%>=33554432 && set secclust=x02 # if %disksize%<=16777216 && set secclust=x02 # if %disksize%<=4299162 && set secclust=x01 set mediabyt=xF8 set fatsz16=x00\x01 set sectrack= set sectrack=x3F\x00 set /A headslow=%heads% set numheads=%headslow:~1,3%\x00 # Set FAT's set volumeid=x78\x56\x34\x12 set magicbyt=x55\xAA set writefat=%mediabyt%\xFF\xFF\xFF # Write Bootcode jump (3 bytes) write ()+1 \%jump% # Write Bios Parameter Block # Write oemname(8) bytesect(2) secclust(1) rsrvsect(2) write --offset=0x03 ()+1 %oemname%\%bytpersec%\%secclust%\x01\x00 # write numfats(1) rootentr(2) totsect(2) mediabyt(1) fatsz16(2) sectrack(2) numheads(2) write --offset=0x10 ()+1 \x02\x00\x02\x00\x00\%mediabyt%\%fatsz16%\%sectrack%\%numheads% # Write hiddsec(4) from MBR dd if=(hd0)+1 of=()+1 bs=1 count=4 skip=0x1C6 seek=0x01C # Write totsec32(4) from MBR. If Volume >= 65536 sectors ! dd if=(hd0)+1 of=()+1 bs=1 count=4 skip=0x1CA seek=0x020 # write --offset=0x24 ()+1 \x80\x00 # Write Extended Boot Record # Write drvnum(1) rsrv(1) extbtsign(1) volumeid(4) vollabel(11) filsystype(8) write --offset=0x24 ()+1 \x80\x00\x29\%volumeid%NO\x20\NAME\x20\x20\x20\x20FAT16\x20\x20\x20 # Write Magic Bytes (2) write --offset=0x1FE ()+1 \%magicbyt% # Write FAT's write ()1+1 \%writefat% write ()257+1 \%writefat% # Write Volume Label to first Directory entry clear echo Volume Label maximum 11 signs set /p:60 /u VOLLABEL=Write Volume Label and press Enter in 60 seconds: write ()513+1 \xE5\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x21 if /i "%VOLLABEL%"=="" && goto :novollab set /u VOLLABEL=%VOLLABEL:~0,11% write ()513+1 %VOLLABEL% :novollab clear echo echo FAT sub-type: FAT16 echo Number of FAT's: 2 set /a secpclus=0%secclust% echo Sectors per cluster: %secpclus% echo Sectors per FAT: 256 set /a clusters=%ptlength% - 256 - 256 - 1 - 32 / %secpclus% echo Total clusters: %clusters% echo FAT start sector: 1 set /a drvspace=%clusters% * %secpclus% / 2 set /a mbspace=%drvspace% / 1024 echo %drvspace% KB total disk space (%mbspace% MB rounded down). echo debug on uuid () echo vol () pause --wait=60 To continue anyway: press a key.... debug off :eof --------------------------------------------------------------------------------------------------------------------------- The FAT part has some weaknesses: Volume ID is not according to standards. Can be changed easily with command uuid --write. If desired, a Volume Label can be written with vol --write, after running rd2hdfat16.g4b Update: Batch-file now like rd2hdf32.g4b (see below) Added dialog for writing a Volume Label (Grub4Dos vol --write and Windows' SCANDSKW.EXE compatible). Dialogs time bound. Added a disk size command-line argument. Use: rd2hdf16.g4b SIZE (in MB). Example: rd2hdf16.g4b 33 will make (hd0,0) 33MB in memory, FAT16 formatted. Size is rounded down to cylinder boundaries Update 2 --rd-base set to 50MB, edited one #comment.
  9. deomsh
    I use Netscape 3.04 Gold on Windows 3.1 (with MSClient, connected to my router). Browsing seems almost impossible, but with http://proxycrime.com almost everything IS possible. I even managed to download Kernelex 4.5.2 from Sourceforge. But javascript is to old (should be disabled). Websites can only be viewed in a sort of elementary html user mode. Most login-buttons won't show up.
  10. deomsh
    If the printer needs USB 2.0 an Enhanced USB controller driver is needed anyway. Personally I prefer NUSB33. Showed Device Manager an Unknown USB Device? About your USB-printer: a seperate driver should be needed. Can't help you further, I have used a HP Laserjet 4 Plus (LPT; duplex; 1993!) during 13 years, until a few weeks ago. Repair seems to be impossible
  11. deomsh
    What kind of USB devices (or controllers?) did you mean?
  12. deomsh
    Nice tools, I have just tested them. Thnx I have run all the tests, anything goes as soon the USB-FDD is accessed once. Even ls (fd0)/pleasels.me did the trick, grub gave error "file not found" (will only work in menu.lst with errorcheck off). Also map the image again in the same Grub-session (in earlier drafts of Part 8½ I mapped first a floppy image right before hdd-512mb-img.gz - but thought it would be to experimental for my menu.lst). I also tested loading hdd-512mb-img-gz from a real floppy after booting form USB-FDD. Exactly the same story. Without earlier drive access by Grub4Dos always the "bad" 0x0E mapping. As soon there has been "real floppy" drive access (nice: one can hear it) everything is fine with the 0x06 mapping.
  13. deomsh
    First "ls"-command instead of "find" root (fd0) Filesystem type is fat16, using whole disk ls /hdd-512mb.img.gz Hdd-512mb.img.gz map --mem --unsafe-boot --heads=32 --sectors-per-track-63 /hdd-512mb.img.gz (hd0) Autodetect number-of-heads failed. Use the specified 32 Autodetect sectors-per-track failed. Use the specified 63 floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x06. geometry (hd0) drive 0x80(LBA): C/H/S=520/32/63, Sector Count/Size=1048320/512 cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 ; ........?....... 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001FE: 55 AA ; U. Second "ls"-command instead of "find" ls (fd0)/hdd-512mb.img Hdd-512mb.img.gz map --mem --unsafe-boot --heads=32 --sectors-per-track=63 /hdd-512mb.img> Autodetect number-of-heads failed. Use the specified 32 Autodetect sectors-per-track failed. Use the specified 63 floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x06. geometry (hd0) drive 0x80(LBA): C/H/S=520/32/63, Sector Count/Size=1048320/512 cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 ; ........?....... 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001FE: 55 AA ; U. I tested the ls-command as you asked, no difference. Always the "good" mapping (although unbalanced, as you teached me). "Timing" was just an idea. The whole problem is *somehow* USB-FDD related. If I boot from USB-FDD, but the image is located on an USB-HDD usually the Memdrive has Partition ID 0x06. If I boot from USB-HDD, but the image is located on an USB-FDD things are much worse. Sometimes I first have to map the USB-FDD before Grub4Dos finds the image! I have used used Partition Magic many years, always complaining about this "thing". But the corrections the program wanted usual make things worse. I have to investigate the CHS/LBA balancing further, because I never succeeded to boot from Winimage IMA-images with MBR, mapped to a Memdrive. IMA-images without MBR gave no problem, but had always the Grub4Dos MBR with Partition ID 0x0E (which as such is not a problem in case of Win9x).
  14. deomsh
    is a "hardcoded/absolute" path to the image, this one: is a "relative" path. Both are "wrong" (theorically/philosophically), what happens with the "right" one?: Or there are other differences that I missed? No other differences The "good" one gives exactly same results as giving find --set-root /hdd-512mb-img-gz first. I tried that too earlier. Both GRAB1TXT and GRAB2.TXT are identical find --set-root /hdd-512mb.img.gz (fd0) map --mem --unsafe-boot --heads=32 --sectors-per-track=63 /hdd-512mb.img.gz (hd0 ) Autodetect number-of-heads failed. Use the specified 32 Autodetect sectors-per-track failed. Use the specified 63 floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x06. geometry (hd0) drive 0x80(LBA): C/H/S=520/32/63, Sector Count/Size=1048320/512 grab.g4b cat --hex --length=256 (hd0)+1 00000000: 33 C0 8E C0 8E D8 8E D0 BC 00 7C FC 8B F4 BF 00 ; 3.........|..... 00000010: 06 B9 00 01 F2 A5 EA 67 06 00 00 8B D5 58 A2 4F ; .......g.....X.O 00000020: 07 3C 35 74 23 B4 10 F6 E4 05 AE 04 8B F0 80 7C ; .<5t#..........| 00000030: 04 00 74 44 80 7C 04 05 74 3E C6 04 80 E8 DA 00 ; ..tD.|..t>...... 00000040: 8A 74 01 8B 4C 02 EB 08 E8 CF 00 B9 01 00 32 D1 ; .t..L.........2. 00000050: BB 00 7C B8 01 02 CD 13 72 1E 81 BF FE 01 55 AA ; ..|.....r.....U. 00000060: 75 16 EA 00 7C 00 00 80 FA 81 74 02 B2 80 8B EA ; u...|.....t..... 00000070: 42 80 F2 B3 88 16 41 07 BF BE 07 B9 04 00 C6 06 ; B.....A......... 00000080: 34 07 31 32 F6 88 2D 8A 45 04 3C 00 74 23 3C 05 ; 4.12..-.E.<.t#<. 00000090: 74 1F FE C6 BE 31 07 E8 71 00 BE 4F 07 46 46 8B ; t....1..q..O.FF. 000000A0: 1C 0A FF 74 05 32 7D 04 75 F3 8D B7 7B 07 E8 5A ; ...t.2}.u...{..Z 000000B0: 00 83 C7 10 FE 06 34 07 E2 CB 80 3E 75 04 02 74 ; ......4....>u..t 000000C0: 0B BE 42 07 0A F6 75 0A CD 18 EB AC BE 31 07 E8 ; ..B...u......1.. 000000D0: 39 00 E8 36 00 32 E4 CD 1A 8B DA 83 C3 60 B4 01 ; 9..6.2.......`.. 000000E0: CD 16 B4 00 75 0B CD 1A 3B D3 72 F2 A0 4F 07 EB ; ....u...;.r..O.. 000000F0: 0A CD 16 8A C4 3C 1C 74 F3 04 F6 3C 31 72 D6 3C ; .....<.t...<1r.< grab.g4b 1 cat --hex --skip=256 --length=256 (hd0)+1 00000100: 35 77 D2 50 BE 2F 07 BB 1B 06 53 FC AC 50 24 7F ; 5w.P./....S..P$. 00000110: B4 0E CD 10 58 A8 80 74 F2 C3 56 B8 01 03 BB 00 ; ....X..t..V..... 00000120: 06 B9 01 00 32 F6 CD 13 5E C6 06 4F 07 3F C3 0D ; ....2...^..O.?.. 00000130: 8A 0D 0A 46 35 20 2E 20 2E 20 2E A0 64 69 73 6B ; ...F5 . . ..disk 00000140: 20 32 0D 0A 0A 44 65 66 61 75 6C 74 3A 20 46 31 ; 2...Default: F1 00000150: A0 00 01 00 04 00 06 03 07 07 0A 0A 63 0E 64 0E ; ............c.d. 00000160: 65 14 80 19 81 19 82 19 83 1E 93 24 A5 2B 9F 2F ; e..........$.+./ 00000170: 75 33 52 33 DB 36 40 3B F2 41 00 44 6F F3 48 70 ; u3R3.6@;.A.Do.Hp 00000180: 66 F3 4F 73 B2 55 6E 69 F8 4E 6F 76 65 6C EC 4D ; f.Os.Uni.Novel.M 00000190: 69 6E 69 F8 4C 69 6E 75 F8 41 6D 6F 65 62 E1 46 ; ini.Linu.Amoeb.F 000001A0: 72 65 65 42 53 C4 42 53 44 E9 50 63 69 F8 43 70 ; reeBS.BSD.Pci.Cp 000001B0: ED 56 65 6E 69 F8 44 6F 73 73 65 E3 3F BF 80 01 ; .Veni.Dosse.?... 000001C0: 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 00 00 ; ......?......... 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 2 However, your correction of the C/H/S counting did the trick. I added the partition table and first few lines of the boot sector, with corresponding bytes of the original image. "Better" DosBox 512MB image with Jaclaz' proposal to correct CHS/LBA unbalance map --mem --unsafe-boot --heads=32 --sectors-per-track=63 (fd0)/mod512j1.img.gz (hd0) probed C/H/S = 520/32/63, probed total sectors = 1048320 floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x06. geometry (hd0) drive 0x80(LBA): C/H/S=520/32/63, Sector Count/Size=1048320/512 Partition num: 0, active, Filesystem type is fat16, partition type 0x06 grab.g4b cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 07 3F 00 00 00 C1 FE 0F 00 ; ........?....... 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001FE: 55 AA ; U. cat --hex --skip=446 --length=66 (fd0)/hdd512mb.img 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 ; ........?....... 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001FE: 55 AA ; U. grab.g4b 1 cat --hex --length=80 (hd0,0)+1 00000000: EB 3C 90 4D 53 44 4F 53 35 2E 30 00 02 10 01 00 ; .<.MSDOS5.0..... 00000010: 02 00 02 00 00 F8 00 01 3F 00 20 00 3F 00 00 00 ; ........?. .?... 00000020: C1 FE 0F 00 80 00 29 24 0C 11 00 4E 4F 20 4E 41 ; ......)$...NO NA 00000030: 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ; ME FAT16 .. 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ cat --hex --skip=32256 --length=80 (fd0)/hdd512mb.img 00007E00: EB 3C 90 4D 53 44 4F 53 35 2E 30 00 02 10 01 00 ; .<.MSDOS5.0..... 00007E10: 02 00 02 00 00 F8 00 01 3F 00 20 00 3F 00 00 00 ; ........?. .?... 00007E20: C1 FE 0F 00 80 00 29 24 0C 11 00 4E 4F 20 4E 41 ; ......)$...NO NA 00007E30: 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ; ME FAT16 .. 00007E40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 2 Jaclaz, you are a genius, correcting the CHS/LBA unbalance solved the problem.
  15. deomsh
    I am very grateful for this, your idea to map the Grub4Dos ramdrive to a harddrive is very promising. I am still busy testing. It appears the bootsector is write protected, but mapping with --unsafe-boot did the trick. The FAT module gives still the wrong mediabyte (F0 instead of F8), but can be useful because of the possibility to write an uuid and/or an volume to the drive for easier identification. No problem to install Windows 98se on the drive after running SCANDISK and SYS! I tried other --heads=64/32/16 to change the geometry of the Memdrive while mapping the Dosbox image, but that didn't make any difference. But I think I found how the "bad" Memdrive is different from the "good" one. Thanks to the homework you gave me, I became more aware of the hex representation of MBR's, bootsectors and starting bytes of the FAT. BAD mapping to a Memdrive of Dosbox image in hdd-512mb.img.gz map --mem --unsafe-boot --heads=32 --sectors-per-track=63 (fd0)/hdd-512mb.img.gz (hd0) Autodetect number-of-heads failed. Use the specified 32 Autodetect sectors-per-track failed. Use the specified 63 floppies_orig=1, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x0E. geometry (hd0) drive 0x80(LBA): C/H/S=521/32/63, Sector Count/Size=1048384/512 Partition num: 0, active, Filesystem type unknown, partition type 0x0E grab.g4b cat --hex --length=256 (hd0)+1 00000000: FA 33 C0 8E D0 BC 00 7C FB 50 1F 50 07 FC BE 1C ; .3.....|.P.P.... 00000010: 7C BF 1C 06 50 57 B9 E4 01 F3 A4 CB 1E BB 00 7C ; |...PW.........| 00000020: 53 BA 80 01 52 B8 01 02 53 41 CD 13 5F BE BE 07 ; S...R...SA.._... 00000030: 56 5D 5A FA CB 00 00 00 00 00 00 00 00 00 00 00 ; V]Z............. 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 1 cat --hex --skip=256 --length=256 (hd0)+1 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001B0: 00 00 00 00 00 00 00 00 80 00 00 00 00 00 80 01 ; ................ 000001C0: 01 00 0E 01 81 08 3F 00 00 00 01 FF 0F 00 00 00 ; ......?......... 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 2 cat --hex --length=256 (hd0)63+1 00000000: 33 C0 8E C0 8E D8 8E D0 BC 00 7C FC 8B F4 BF 00 ; 3.........|..... 00000010: 06 B9 00 01 F2 A5 EA 67 06 00 00 8B 3F 00 00 00 ; .......g....?... 00000020: 07 3C 35 74 23 B4 10 F6 E4 05 AE 04 8B F0 80 7C ; .<5t#..........| 00000030: 04 00 74 44 80 7C 04 05 74 3E C6 04 80 E8 DA 00 ; ..tD.|..t>...... 00000040: 8A 74 01 8B 4C 02 EB 08 E8 CF 00 B9 01 00 32 D1 ; .t..L.........2. 00000050: BB 00 7C B8 01 02 CD 13 72 1E 81 BF FE 01 55 AA ; ..|.....r.....U. 00000060: 75 16 EA 00 7C 00 00 80 FA 81 74 02 B2 80 8B EA ; u...|.....t..... 00000070: 42 80 F2 B3 88 16 41 07 BF BE 07 B9 04 00 C6 06 ; B.....A......... 00000080: 34 07 31 32 F6 88 2D 8A 45 04 3C 00 74 23 3C 05 ; 4.12..-.E.<.t#<. 00000090: 74 1F FE C6 BE 31 07 E8 71 00 BE 4F 07 46 46 8B ; t....1..q..O.FF. 000000A0: 1C 0A FF 74 05 32 7D 04 75 F3 8D B7 7B 07 E8 5A ; ...t.2}.u...{..Z 000000B0: 00 83 C7 10 FE 06 34 07 E2 CB 80 3E 75 04 02 74 ; ......4....>u..t 000000C0: 0B BE 42 07 0A F6 75 0A CD 18 EB AC BE 31 07 E8 ; ..B...u......1.. 000000D0: 39 00 E8 36 00 32 E4 CD 1A 8B DA 83 C3 60 B4 01 ; 9..6.2.......`.. 000000E0: CD 16 B4 00 75 0B CD 1A 3B D3 72 F2 A0 4F 07 EB ; ....u...;.r..O.. 000000F0: 0A CD 16 8A C4 3C 1C 74 F3 04 F6 3C 31 72 D6 3C ; .....<.t...<1r.< grab.g4b 3 cat --hex --skip=256 --length=256 (hd0)63+1 00000100: 35 77 D2 50 BE 2F 07 BB 1B 06 53 FC AC 50 24 7F ; 5w.P./....S..P$. 00000110: B4 0E CD 10 58 A8 80 74 F2 C3 56 B8 01 03 BB 00 ; ....X..t..V..... 00000120: 06 B9 01 00 32 F6 CD 13 5E C6 06 4F 07 3F C3 0D ; ....2...^..O.?.. 00000130: 8A 0D 0A 46 35 20 2E 20 2E 20 2E A0 64 69 73 6B ; ...F5 . . ..disk 00000140: 20 32 0D 0A 0A 44 65 66 61 75 6C 74 3A 20 46 31 ; 2...Default: F1 00000150: A0 00 01 00 04 00 06 03 07 07 0A 0A 63 0E 64 0E ; ............c.d. 00000160: 65 14 80 19 81 19 82 19 83 1E 93 24 A5 2B 9F 2F ; e..........$.+./ 00000170: 75 33 52 33 DB 36 40 3B F2 41 00 44 6F F3 48 70 ; u3R3.6@;.A.Do.Hp 00000180: 66 F3 4F 73 B2 55 6E 69 F8 4E 6F 76 65 6C EC 4D ; f.Os.Uni.Novel.M 00000190: 69 6E 69 F8 4C 69 6E 75 F8 41 6D 6F 65 62 E1 46 ; ini.Linu.Amoeb.F 000001A0: 72 65 65 42 53 C4 42 53 44 E9 50 63 69 F8 43 70 ; reeBS.BSD.Pci.Cp 000001B0: ED 56 65 6E 69 F8 44 6F 73 73 65 E3 3F BF 80 01 ; .Veni.Dosse.?... 000001C0: 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 00 00 ; ......?......... 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 4 cat --hex --length=256 (hd0,0)+1 00000000: 33 C0 8E C0 8E D8 8E D0 BC 00 7C FC 8B F4 BF 00 ; 3.........|..... 00000010: 06 B9 00 01 F2 A5 EA 67 06 00 00 8B 3F 00 00 00 ; .......g....?... 00000020: 07 3C 35 74 23 B4 10 F6 E4 05 AE 04 8B F0 80 7C ; .<5t#..........| 00000030: 04 00 74 44 80 7C 04 05 74 3E C6 04 80 E8 DA 00 ; ..tD.|..t>...... 00000040: 8A 74 01 8B 4C 02 EB 08 E8 CF 00 B9 01 00 32 D1 ; .t..L.........2. 00000050: BB 00 7C B8 01 02 CD 13 72 1E 81 BF FE 01 55 AA ; ..|.....r.....U. 00000060: 75 16 EA 00 7C 00 00 80 FA 81 74 02 B2 80 8B EA ; u...|.....t..... 00000070: 42 80 F2 B3 88 16 41 07 BF BE 07 B9 04 00 C6 06 ; B.....A......... 00000080: 34 07 31 32 F6 88 2D 8A 45 04 3C 00 74 23 3C 05 ; 4.12..-.E.<.t#<. 00000090: 74 1F FE C6 BE 31 07 E8 71 00 BE 4F 07 46 46 8B ; t....1..q..O.FF. 000000A0: 1C 0A FF 74 05 32 7D 04 75 F3 8D B7 7B 07 E8 5A ; ...t.2}.u...{..Z 000000B0: 00 83 C7 10 FE 06 34 07 E2 CB 80 3E 75 04 02 74 ; ......4....>u..t 000000C0: 0B BE 42 07 0A F6 75 0A CD 18 EB AC BE 31 07 E8 ; ..B...u......1.. 000000D0: 39 00 E8 36 00 32 E4 CD 1A 8B DA 83 C3 60 B4 01 ; 9..6.2.......`.. 000000E0: CD 16 B4 00 75 0B CD 1A 3B D3 72 F2 A0 4F 07 EB ; ....u...;.r..O.. 000000F0: 0A CD 16 8A C4 3C 1C 74 F3 04 F6 3C 31 72 D6 3C ; .....<.t...<1r.< grab.g4b 5 cat --hex --skip=256 --length=256 (hd0,0)+1 00000100: 35 77 D2 50 BE 2F 07 BB 1B 06 53 FC AC 50 24 7F ; 5w.P./....S..P$. 00000110: B4 0E CD 10 58 A8 80 74 F2 C3 56 B8 01 03 BB 00 ; ....X..t..V..... 00000120: 06 B9 01 00 32 F6 CD 13 5E C6 06 4F 07 3F C3 0D ; ....2...^..O.?.. 00000130: 8A 0D 0A 46 35 20 2E 20 2E 20 2E A0 64 69 73 6B ; ...F5 . . ..disk 00000140: 20 32 0D 0A 0A 44 65 66 61 75 6C 74 3A 20 46 31 ; 2...Default: F1 00000150: A0 00 01 00 04 00 06 03 07 07 0A 0A 63 0E 64 0E ; ............c.d. 00000160: 65 14 80 19 81 19 82 19 83 1E 93 24 A5 2B 9F 2F ; e..........$.+./ 00000170: 75 33 52 33 DB 36 40 3B F2 41 00 44 6F F3 48 70 ; u3R3.6@;.A.Do.Hp 00000180: 66 F3 4F 73 B2 55 6E 69 F8 4E 6F 76 65 6C EC 4D ; f.Os.Uni.Novel.M 00000190: 69 6E 69 F8 4C 69 6E 75 F8 41 6D 6F 65 62 E1 46 ; ini.Linu.Amoeb.F 000001A0: 72 65 65 42 53 C4 42 53 44 E9 50 63 69 F8 43 70 ; reeBS.BSD.Pci.Cp 000001B0: ED 56 65 6E 69 F8 44 6F 73 73 65 E3 3F BF 80 01 ; .Veni.Dosse.?... 000001C0: 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 00 00 ; ......?......... 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 6 cat --hex --length=256 (hd0,0)63+1 00000000: EB 3C 90 4D 53 44 4F 53 35 2E 30 00 02 10 01 00 ; .<.MSDOS5.0..... 00000010: 02 00 02 00 00 F8 00 01 3F 00 20 00 3F 00 00 00 ; ........?. .?... 00000020: C1 FE 0F 00 80 00 29 24 0C 11 00 4E 4F 20 4E 41 ; ......)$...NO NA 00000030: 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ; ME FAT16 .. 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 7 cat --hex --skip=256 --length=256 (hd0,0)63+1 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 8 Watch the sector count of the "good" mapping, 64 sectors less. GOOD mapping of Dosbox image in hdd-512mb.img.gz find /hdd-512mb.img.gz (fd0) map --mem --unsafe-boot --heads=32 --sectors-per-track=63 /hdd-512mb.img.gz (hd0 ) Autodetect number-of-heads failed. Use the specified 32 Autodetect sectors-per-track failed. Use the specified 63 map --hook parttype (hd0,0) Partition type for (hd0,0) is 0x06. geometry (hd0) drive 0x80(LBA): C/H/S=520/32/63, Sector Count/Size=1048320/512 grab.g4b cat --hex --length=256 (hd0)+1 00000000: 33 C0 8E C0 8E D8 8E D0 BC 00 7C FC 8B F4 BF 00 ; 3.........|..... 00000010: 06 B9 00 01 F2 A5 EA 67 06 00 00 8B D5 58 A2 4F ; .......g.....X.O 00000020: 07 3C 35 74 23 B4 10 F6 E4 05 AE 04 8B F0 80 7C ; .<5t#..........| 00000030: 04 00 74 44 80 7C 04 05 74 3E C6 04 80 E8 DA 00 ; ..tD.|..t>...... 00000040: 8A 74 01 8B 4C 02 EB 08 E8 CF 00 B9 01 00 32 D1 ; .t..L.........2. 00000050: BB 00 7C B8 01 02 CD 13 72 1E 81 BF FE 01 55 AA ; ..|.....r.....U. 00000060: 75 16 EA 00 7C 00 00 80 FA 81 74 02 B2 80 8B EA ; u...|.....t..... 00000070: 42 80 F2 B3 88 16 41 07 BF BE 07 B9 04 00 C6 06 ; B.....A......... 00000080: 34 07 31 32 F6 88 2D 8A 45 04 3C 00 74 23 3C 05 ; 4.12..-.E.<.t#<. 00000090: 74 1F FE C6 BE 31 07 E8 71 00 BE 4F 07 46 46 8B ; t....1..q..O.FF. 000000A0: 1C 0A FF 74 05 32 7D 04 75 F3 8D B7 7B 07 E8 5A ; ...t.2}.u...{..Z 000000B0: 00 83 C7 10 FE 06 34 07 E2 CB 80 3E 75 04 02 74 ; ......4....>u..t 000000C0: 0B BE 42 07 0A F6 75 0A CD 18 EB AC BE 31 07 E8 ; ..B...u......1.. 000000D0: 39 00 E8 36 00 32 E4 CD 1A 8B DA 83 C3 60 B4 01 ; 9..6.2.......`.. 000000E0: CD 16 B4 00 75 0B CD 1A 3B D3 72 F2 A0 4F 07 EB ; ....u...;.r..O.. 000000F0: 0A CD 16 8A C4 3C 1C 74 F3 04 F6 3C 31 72 D6 3C ; .....<.t...<1r.< grab.g4b 1 cat --hex --skip=256 --length=256 (hd0)+1 00000100: 35 77 D2 50 BE 2F 07 BB 1B 06 53 FC AC 50 24 7F ; 5w.P./....S..P$. 00000110: B4 0E CD 10 58 A8 80 74 F2 C3 56 B8 01 03 BB 00 ; ....X..t..V..... 00000120: 06 B9 01 00 32 F6 CD 13 5E C6 06 4F 07 3F C3 0D ; ....2...^..O.?.. 00000130: 8A 0D 0A 46 35 20 2E 20 2E 20 2E A0 64 69 73 6B ; ...F5 . . ..disk 00000140: 20 32 0D 0A 0A 44 65 66 61 75 6C 74 3A 20 46 31 ; 2...Default: F1 00000150: A0 00 01 00 04 00 06 03 07 07 0A 0A 63 0E 64 0E ; ............c.d. 00000160: 65 14 80 19 81 19 82 19 83 1E 93 24 A5 2B 9F 2F ; e..........$.+./ 00000170: 75 33 52 33 DB 36 40 3B F2 41 00 44 6F F3 48 70 ; u3R3.6@;.A.Do.Hp 00000180: 66 F3 4F 73 B2 55 6E 69 F8 4E 6F 76 65 6C EC 4D ; f.Os.Uni.Novel.M 00000190: 69 6E 69 F8 4C 69 6E 75 F8 41 6D 6F 65 62 E1 46 ; ini.Linu.Amoeb.F 000001A0: 72 65 65 42 53 C4 42 53 44 E9 50 63 69 F8 43 70 ; reeBS.BSD.Pci.Cp 000001B0: ED 56 65 6E 69 F8 44 6F 73 73 65 E3 3F BF 80 01 ; .Veni.Dosse.?... 000001C0: 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 00 00 ; ......?......... 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 2 cat --hex --length=256 (hd0)63+1 00000000: EB 3C 90 4D 53 44 4F 53 35 2E 30 00 02 10 01 00 ; .<.MSDOS5.0..... 00000010: 02 00 02 00 00 F8 00 01 3F 00 20 00 3F 00 00 00 ; ........?. .?... 00000020: C1 FE 0F 00 80 00 29 24 0C 11 00 4E 4F 20 4E 41 ; ......)$...NO NA 00000030: 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ; ME FAT16 .. 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 3 cat --hex --skip=256 --length=256 (hd0)63+1 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 4 cat --hex --length=256 (hd0,0)+1 00000000: EB 3C 90 4D 53 44 4F 53 35 2E 30 00 02 10 01 00 ; .<.MSDOS5.0..... 00000010: 02 00 02 00 00 F8 00 01 3F 00 20 00 3F 00 00 00 ; ........?. .?... 00000020: C1 FE 0F 00 80 00 29 24 0C 11 00 4E 4F 20 4E 41 ; ......)$...NO NA 00000030: 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ; ME FAT16 .. 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 5 cat --hex --skip=256 --length=256 (hd0,0)+1 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ; ..............U. grab.g4b 6 cat --hex --length=256 (hd0,0)63+1 00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000000F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 7 cat --hex --skip=256 --length=256 (hd0,0)63+1 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ 000001F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ; ................ grab.g4b 8 The MBR and the bootsector of the "good" 06-mapping are identical to what's inside the image; checked with HxD. The MBR of the "bad" 0E-mapping is the one that Grub4Dos generates while mapping a partition to a Memdrive. Somehow it seems that Grub4Dos has find/read/timing problems in case of USB-FDD. With or without real floppy attached made no difference. About the two first commands of the "good mapping": with or without --unsafe-boot made no difference either. I tested the two command chains on three machines with different chipsets, all same results. Also on one machine with the USB-FDD in three different ways formatted.
  16. deomsh
    Only with USB drivers disabled. See my Windows 98se project, Part I and Part III. I don't possess Windows ME. https://msfn.org/board/topic/180597-exploring-setup-p-isdetectbus-and-grub4dos-8½-times-win98se-on-usb-drive/
  17. deomsh
    I am afraid there is some misunderstanding. I said following: and: but also: For now I will return to my labarotory to run the tests you gave so friendly. BTW in the meantime I found out that I can open the uncompressed DosBox images with HxD, so I hopefully I can deliver some more info.
  18. deomsh
    Grub4Dos "asked" me for it, else the image won't load. I examined the source image more closely. The DosBox image seems to have partition table, exactly the same as first cat --hex below. First set of commands >insmod fat Fat loaded >map --mem --heads=255 --sectors-per-track=63 (fd0)/hdd-512mb.img.gz (hd0) Autodetect number-of-heads failed. Use the specified 255 Autodetect sectors-per-track failed. Use the specified 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 >map --hook >parttype (hd0,0) Partition type for (hd0,0) is 0x06 >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001FE: 55 AA >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 520/31/63 63 1048257 #1 00 00 0/0/0 0/0/0 0 0 #2 00 00 0/0/0 0/0/0 0 0 #3 00 00 0/0/0 0/0/0 0 0 >fat mkfs (hd0,0) FAT sub-type: FAT16 Sectors per cluster: 32 Sectors per FAT:128 Number of free clusters: 32753 Total clusters: 32753 FAT start sector: 1 524080 KB total drive space. 524080 KB available. >parttype (hd0,0) NOTHING ON SCREEN (only if mbrview was loaded before) >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001FE: 55 AA >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 520/31/63 63 1048257 #1 00 00 0/0/0 0/0/0 0 0 #2 00 00 0/0/0 0/0/0 0 0 #3 00 00 0/0/0 0/0/0 0 0 Second set of commands >insmod fat Fat loaded >map --mem --heads=255 --sectors-per-track=63 (fd0)/hdd-512mb.img.gz (hd0) Autodetect number-of-heads failed. Use the specified 255 Autodetect sectors-per-track failed. Use the specified 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 >map --hook >parttype (hd0,0) Partition type for (hd0,0) is 0x06 >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 1F BF 08 3F 00 00 00 C1 FE 0F 00 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001FE: 55 AA >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 520/31/63 63 1048257 #1 00 00 0/0/0 0/0/0 0 0 #2 00 00 0/0/0 0/0/0 0 0 #3 00 00 0/0/0 0/0/0 0 0 >partnew (hd0,0) 0x06 63 1048289 >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 Partition num: 0, active, Filesystem type is fat16, partition type 0x06 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 41 20 41 3F 00 00 00 E1 FE 0F 00 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001FE: 55 AA >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 65/65/32 63 1048289 #1 00 00 0/0/0 0/0/0 0 0 #2 00 00 0/0/0 0/0/0 0 0 #3 00 00 0/0/0 0/0/0 0 0 >fat mkfs (hd0,0) FAT sub-type: FAT16 Sectors per cluster: 32 Sectors per FAT:128 Number of free clusters: 32754 Total clusters: 32754 FAT start sector: 1 524064 KB total drive space. 524064 KB available. >parttype (hd0,0) NOTHING ON SCREEN >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 Partition num: 0, active, Filesystem type is fat16, partition type 0x06 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 41 20 41 3F 00 00 00 E1 FE 0F 00 000001CE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001DE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001EE: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 000001FE: 55 AA >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 65/65/32 63 1048289 #1 00 00 0/0/0 0/0/0 0 0 #2 00 00 0/0/0 0/0/0 0 0 #3 00 00 0/0/0 0/0/0 0 0 No changes in the First set of cammands after fat mkfs (hd0,0) Changes after partnew (hd0,0) 0x06 63 1048289 in Bold: >geometry (hd0) drive 0x80(LBA): C/H/S=66/255/63, Sector Count/Size=1048320/512 Partition num: 0, active, Filesystem type is fat16, partition type 0x06 >cat --hex --skip=446 (hd0)+1 000001BE: 80 01 01 00 06 41 20 41 3F 00 00 00 E1 FE 0F 00 >/mbrview.g4b (hd0) Drive=(hd0), Signature=737365E3 Part Type Boot Begin CHS End CHS LBA Start LBA Sectors #0 06 80 0/1/1 65/65/32 63 1048289 >fat mkfs (hd0,0) FAT sub-type: FAT16 Sectors per cluster: 32 Sectors per FAT:128 Number of free clusters: 32754 Total clusters: 32754 FAT start sector: 1 524064 KB total drive space. 524064 KB available. Afterwards no changes.
  19. deomsh
    In case of VBEMP9x you can try DirextX software emulation enabling Direct Draw and possibly Direct 3D (results depends on system speed). See: http://www.mdgx.com/newtip18.htm
  20. deomsh
    I needed an empty Memdrive, accessable by MS-DOS and by Grub4Dos. While using an empty gzipped DosBox image, sometimes the Memdrive was "ready", sometimes had to be formatted first in MS-DOS. They make no sense whatsoever. 1) you map an existing (compressed) image residing on floppy to current hard disk (which may be *whatever* depending on what has been run before and on the setup) and the result could be anything (and the contary of it) depending on the contents of the image 2) you hook the mapping 3) you set root to the floppy 4) you chainload the OS file on floppy In those the image is simply mapped and is not changed by any of the commands you listed, and BTW you never access it from grub4dos. There is no bootsector in the uncompressed image as far I can judge (which is not so far) Further: I have no need to access the content of the image from Grub4Dos. All right, here they are. For convenience I added parttype (hd-1,0). USB-FDD; first set of commands(no HDD’s attached; one real Floppy) map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) Autodetect number-of-heads failed. Use default value 255 Autodetect sectors-per-track failed. Use default value 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd-1,0) Partition type for (hd0,0) is 0x0E. root (fd0) Filesystem type is fat16, using whole disk Volume Name is “USBFDSILVER”. chainloader /io.sys Will boot MS-DOS 7.x from drive=0x0, partition=0xff(hidden sectors=0x0) boot Memdrive accessed with MS-DOS 7.1: A:\ >VOL C: gives (Dutch!): Het mediumtype is ongeldig. Bezig met lezen station C Afbreken, Opnieuw proberen, Mislukt (same as “Invalid mediatype” and “Abort/Retry/Fail”) The Memdrive need to be formatted. Bootsector is filled out in a way unknown to me (as shown by PTEDIT). USB-FDD; second set of commands map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) Autodetect number-of-heads failed. Use default value 255 Autodetect sectors-per-track failed. Use default value 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd-1,0) Partition type for (hd0,0) is 0x0E. insmod fat fat loaded fat mkfs (hd-1,0) FAT subtype: FAT16 Sectors per cluster: 32 Sectors per FAT:128 Number of free clusters: 32755 Total clusters: 32755 FAT start sector: 1 524080 KB total drive space. 524080 KB available. root (fd0) Filesystem type is fat16, using whole disk Volume Name is “USBFDSILVER”. chainloader /io.sys Will boot MS-DOS 7.x from drive=0x0, partition=0xff(hidden sectors=0x0) Memdrive accessed with MS-DOS 7.1: A:\>VOL C: gives normal output Bootsector is like described in my post of https://msfn.org/board/topic/180597-exploring-setup-p-isdetectbus-and-grub4dos-8½-times-win98se-on-usb-drive/?do=findComment&comment=1176826 (Scandisk did found errors). USB-FDD; third set of commands insmod fat fat loaded map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) Autodetect number-of-heads failed. Use default value 255 Autodetect sectors-per-track failed. Use default value 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd-1,0) Partition type for (hd0,0) is 0x06. root (fd0) Filesystem type is fat16, using whole disk Volume Name is “USBFDSILVER”. chainloader /io.sys Will boot MS-DOS 7.x from drive=0x0, partition=0xff(hidden sectors=0x0) Memdrive accessed with MS-DOS 7.1: >A:\VOL C: gives normal output Bootsector is “normal” (mediatype: F8), Scandisk didn’t found errors. USB-FDD; fourth set of commands insmod fat fat loaded map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) Autodetect number-of-heads failed. Use default value 255 Autodetect sectors-per-track failed. Use default value 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd-1,0) Partition type for (hd0,0) is 0x06. fat mkfs (hd-1,0) FAT subtype: FAT16 Sectors per cluster: 32 Sectors per FAT:128 Number of free clusters: 32755 Total clusters: 32755 FAT start sector: 1 524080 KB total drive space. 524080 KB available. root (fd0) Filesystem type is fat16, using whole disk Volume Name is “USBFDSILVER”. chainloader /io.sys Will boot MS-DOS 7.x from drive=0x0, partition=0xff(hidden sectors=0x0) Memdrive accessed with MS-DOS 7.1: A:\>VOL C: gives normal output Bootsector is NOT “normal” (mediatype: F0) Scandisk did found errors as described earlier. USB-FDD; fifth set of commands root (fd0) Filesystem type is fat16, using whole disk Volume Name is “USBFDSILVER”. map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) Autodetect number-of-heads failed. Use default value 255 Autodetect sectors-per-track failed. Use default value 63 [xxxM/511M] floppies_orig=2, harddrives_orig=0, floppies_curr=1, harddrives_curr=1 map --hook parttype (hd-1,0) Partition type for (hd0,0) is 0x06. chainloader /io.sys Will boot MS-DOS 7.x from drive=0x0, partition=0xff(hidden sectors=0x0) Memdrive accessed by MS-DOS 7.1: >A:\VOL C: gives normal output Bootsector is “normal”, (mediatype: F8). Scandisk didn’t found errors. It appears that if an USB-FDD is used, I solved my problem giving the command root (fd0) before map --mem. In case of USB-HDD the first set of commands above is enough to obtain an empty Memdrive, ready for the next steps of Part 8½ of my project.
  21. deomsh
    I do not understand "i use the SSD program...". Which video card is in use?
  22. deomsh
    Maybe Exlor98 is worth trying. https://msfn.org/board/topic/84886-the-complete-list-of-hotfixes-updates-for-windows-98se/
  23. deomsh
    I used following commands: title Map hdd-512mb.img.gz and boot USB-FDD # BEFORE # insmod fat map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd-512mb.img.gz (hd) map --hook # AFTER # insmod fat # fat mkfs (hd0,0) root (fd0) chainloader /io.sys I experimented further with four different USB-FDD's and a handfull of USB-HDD´s. The results I described earlier where only existent on USB-FDD's and only if the image was located on an USB-FDD too. On USB-HDD Grub4Dos made out of all empty DosBox images perfect Memdrives. With Partition ID 06, OEM ID MSDOS5.0 and standard FAT16 formatting (Diskedit, Scandisk and SETUP gave no errors). At last I found that in case of USB-FDD setting root (fd0) BEFORE the map-commands had exactly the same effects as sole insmod fat, so the FAT module doesn't seem to be needed in Part 8½ of my project. Same as "Sectors per FAT" (as a layman I have to rely on authority, I use Scott Mueller's Repairing and Upgrading PC's for my terminology). I will have to study these things first more carefully. I will go mainly for FAT16 - because of map --mem my USB-FDD's. Thanks a lot for all info.
  24. deomsh
    @jaclaz Thanks a lot, I had some interesting hours with Grub4Dos, again. I didn't knew this module exists, only found that Grub4Dos wasn't able to format a drive. I did many tests with insmod fat and fat mkfs on an empty "Part 8½ Memdrive", with following results: The Memdrive was formatted directly. insmod fat-command given BEFORE map --mem forced Partition ID 06 and (other CHS values than without). If given AFTER, Partition ID remained to 0E. Scandisk complained about the Mediabyte and missing Second FAT, but could repair them. Win98se SETUP gave a SU-0013 error (saw this one never before). SETUP continued if system was transferred to the Memdrive first with SYS C: (wasn't needed in case of Part 8½: USB-FDD). Diskedit saw an error in the Mediabyte too. About the Bootsector: BPB_SecPerClus and BPB_FATSz16 where different from what "DOS expects". Further was BPB_HiddSec zero. BPB_Media was F0h (instead of F8h). So far the bad news. The good news: during experimenting I "discovered" that giving the command insmod fat BEFORE map --mem, and commenting out fat mkfs, resulted in a fully formatted FAT16 Memdrive with Partition ID 06 and a valid bootsector (from an empty image file)! Gimme such a tool for FAT32 too... I am becoming more interested in your Catedit batch, because of my need to RESIZE the Memdrive in case of mapping a whole USB-FDD to a Memdrive (USB-FDD with saved Windows installation from Part 8½). I bought two 512MB USB drives at AliExpress, incredible how cheap they are. Although seeming only different in color, they appeared to be much more different. One was effective 480MB, the other 502MB. Good with VBEMP 32MB as video driver, but a little to big with Windows' standard VGA or with the NVidia driver for my card. Better would be 400-420MB. Is there any chance your script could be of help in this matter?
  25. deomsh
    Part 8½: Full installation of Windows 98se on a Grub4Dos Memdrive This part is maybe a bit off-topic, but a possibility to use an USB-FDD. Especially older machines cannot boot from USB-HDD. It even turned out possible to use one 1.44MB floppy disk only - together with the Windows 98se CD-ROM! The idea is to make an empty Memdrive with Grub4Dos by mapping an empty image file to memory (with gz-compression only 500-615 KB), and then boot the legacy USB drive first. From MS-DOS 7.1 “Command prompt only” the Memdrive can be formatted, unless the image file is formatted already. Only if installing from USB-HDD, the “System” has to be transferred with SYS [Drive letter]: and some (bootdisk) MS-DOS 7.1 files has to be copied to the Memdrive (in that stage NOT C:). These steps are simple. More difficult is to omit the Windows’ SETUP Reboots. Omitting the first reboot after SETUP dialogues and copying files is almost undocumented (see: http://rjnoe.home.xs4all.nl/0/pc/soft/win/setup/msbt95a.txt ), but turned out to be very easy: adding “Reboot=0” to MSBATCH.INF [Setup] (no quotes). After copying files SETUP stopped, showing the MS-DOS command-prompt started from. To omit reboots during following phases of SETUP, I patched RUNONCE.EXE. I found the idea of patching this file in an old MSFN-tread about “Windows 98 Live-CD Project”, but nowhere a “how-to”. By trial and error and studying Windows’ Reboot and Restart commands, I succeeded at last (a HEX-editor is needed). With patched RUNONCE.EXE Windows can be restarted with “RUN » RUNONCE –q” (no quotes). After installation of Windows 98se directly on the Memdrive, Part 8½ is identical to Part II or Part IV. Further installation can be continued in the same ways, but only as long as the Memdrive exists. Other possibilities are: - Saving to a small, bootable USB-FDD. Later loading the USB-FDD and mapping the Memdrive to first HDD. - Saving with WinImage 8.1 (shareware) to an image WITHOUT Master Boot Record on a bootable USB drive/partition of choice. The image file has to be loaded and mapped to first HDD (hd0). --------------------------------------------------------------------------------- PATCH RUNONCE.EXE ------------------------------ Instead of: “rundll.exe setupx.dll,SxShowRebootDlg_RunDll 15” use “rundll.exe user.exe,exitwindowsexec ”. In HEX, replace: “73 65 74 75 70 78 2E 64 6C 6C 2C 53 78 53 68 6F 77 52 65 62 6F 6F 74 44 6C 67 5F 52 75 6E 44 6C 6C 20 31 35” with: “75 73 65 72 2E 65 78 65 2C 65 78 69 74 77 69 6E 64 6F 77 73 65 78 65 63 00 00 00 00 00 00 00 00 00 00 00 00” --------------------------------------------------------------------------------- I used following MENU.LST, two versions: one in case of USB-FDD and one in case of USB-HDD. --------------------------------------------------------------------------------- MENU.LST ------------------------------ # USB-FDD/ Floppie version # comments before a command title Chainload IO.SYS from USB-FDD root (fd0) chainloader /io.sys title Commandline commandline title Make empty Memdrive with Legacy USB 1.1 access - boot USB-FDD map (hd0) (hd) # some empty IMG files do not need formatting afterwards # FAT16 map --mem --heads=0 --sectors-per-track=0 (fd0)/hdd512im.gz (hd0) # FAT32 # map --mem --heads=0 --sectors-per-track=0 (fd0)/32hd420M.img.gz (hd0) map --hook # working if formatting wasn’t needed vol --write (hd0,0) SETUPMEMDRV root (fd0) chainloader /io.sys title Boot IO.SYS with HIMEMX on Memdrive map (fd1) (fd0) map (fd0) (fd1) map --hook vol --write (hd0,0) MEMDRIVE982 root (hd0,0) chainloader /io.sys pause Remove USB drive title Map USB-FDD and boot IO.SYS on Memdrive # do not use usb --init if Windows hasn’t USB drivers # if in use add mbrint13.sys to IOS.INI [SafeList] # usb --init map (hd0) (hd) # first test from commandline to find C/H/S: map --mem (fd0)+1 (hd0) map --mem --heads=64 --sectors-per-track=32 (fd0)+1 (hd0) map --hook map (fd1) (fd0) map (fd0) (fd1) map --hook map --floppies=2 uuid --write (hd0,0) 1234-5678 vol --write (hd0,0) MEMDRIVE982 root (hd0,0) chainloader /io.sys # no need to remove USB drive title Map Win98se Image and boot IO.SYS on Memdrive errorcheck off map (hd0) (hd) map --mem (fd0)/MEMDRV98.IMA (hd0) map --hook map (fd1) (fd0) map (fd0) (fd1) map --hook uuid --write (hd0,0) 1234-5678 vol --write (hd0,0) MEMDRIVE982 map --floppies=2 root (hd0) chainloader /io.sys title Reboot IO.SYS on Memdrive root (hd0,0) chainloader /io.sys --------------------------------------------------------------------------------- The USB-FDD has to be booted with HIMEM.SYS (!). After making and formatting the Memdrive (if still needed), and after copying at least HIMEMX.EXE, GRUB.EXE and MENU.LST to the empty Memdrive, a full Windows’ installation can be started directly with: “SETUP [Drive][Path]MSBATCH.INF /ir /is /nf /nr /IW /p i;s=detectfloppy” (no quotes). For a quasi-universal installation: “SETUP [Drive][Path]MSBATCH.INF /ir /is /nf /nr /IW /p i;s =detectbus,detectfloppy”. First five setup switches mentioned are most safe and convenient, not mandatory. If a Windows 98 installation exists on an attached hard disk, installation in a directory with another name is mandatory – otherwise there is a high risk the configuration of the existing Windows installation will be used by SETUP. If SETUP has finished the “copy files” part, IO.SYS on the the Memdrive has to be booted from the command-prompt with Grub4Dos, while using HIMEMX.EXE. Afterwards patched RUNONCE.EXE has to be copied to C:\%winbootdir%\SYSTEM. Other desired changes can be made too. After giving the WIN-command, SETUP will continue. I found my patched RUNONCE.EXE restarted Windows twice, installing Windows further in the usual way - up to the Welcome screen. --------------------------------------------------------------------------------- MENU.LST ------------------------------ # USB-HDD version # comments before a command title Chainload IO.SYS from USB-HDD root (hd0,0) chainloader /io.sys title Commandline commandline title Make empty Memdrive with Legacy USB 1.1 access - boot USB-HDD # some empty IMG files do not need formatting afterwards # FAT16; about 500MB map --mem --heads=0 --sectors-per-track=0 (hd0,0)/hdd-512mb.img.gz (hd) # FAT32; about 420MB # map --mem --heads=0 --sectors-per-track=0 (hd0,0)/32hd420M.img.gz (hd) map --hook map (fd1) (fd0) map (fd0) (fd1) map --hook # working if formatting not needed vol --write (hd-1,0) EMPTYMEMDRV root (hd0,0) chainloader /io.sys title First boot IO.SYS on Memdrive (with HIMEM.SYS) map (hd0) (hd-1) map (hd-1) (hd0) map --hook vol --write (hd0,0) SETUPMEMDRV root (hd0,0) chainloader /io.sys title First reboot of IO.SYS on Memdrive (with HIMEMX.EXE) vol --write (hd0,0) MEMDRIVE982 root (hd0,0) chainloader /io.sys pause Remove USB drive title Reboot IO.SYS on Memdrive root (hd0,0) chainloader /io.sys ------------------------------------------------------------------------------------ After booting the USB-HDD, making the empty Memdrive, formatting and installation of basic MS-DOS 7.1 on the empty Memdrive, IO.SYS on the Memdrive has to be booted with HIMEM.SYS (!). CONFIG.SYS or AUTOEXEC.BAT is not needed, only copying MSDOS.SYS (like the one below – attributes SHR), HIMEM.SYS, DBLBUFF.SYS, GRUB.EXE and MENU.LST to the root. Same in case of other real mode drivers needed. IO.SYS will load HIMEM.SYS and DBLBUFF.SYS by default, messages about IFSHLP.SYS and WIN.COM can be ignored. Afterwards the Memdrive is the root-drive (C:). This time a full Windows’ installation can be started, further same as USB-FDD. ------------------------------------------------------------------------------------ MSDOS.SYS ------------------------------ ;SYS [Paths] WinDir=C:\ WinBootDir=C:\ HostWinBootDrv=C [Options] SystemReg=0 ; ;The following lines are required for compatibility with other programs. ;Do not remove them (MSDOS.SYS needs to be >1024 bytes). ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxa ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxb ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxc ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxd ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxe ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxf ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxg ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxh ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxi ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxj ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxk ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxl ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxm ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxn ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxo ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxp ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxq ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxr ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxs ------------------------------------------------------------------------------------ BTW: About empty images: FAT16 512MB images are readily available on the web. Following is *somehow* already formatted: http://sites.google.com/site/dotalshoff/games/dosbox With SplImgCreator.exe (Win9X compatible) unformatted FAT32 images can be created of each desired size, I used 420MB. See: http://reboot.pro/topic/15951-easy-creating-new-empty-img Compression to Grub4Dos-compatible gz-compression with 7-Zip. BTW2: If the Memdrive is readily available as C-drive, a Windows installation directly from CD-ROM is possible. Both the USB drive and the Memdrive should each time be booted with MS-DOS CD-ROM drivers. During ALL phases, SETUP must have access to the CD-ROM to avoid a full reboot (*somehow* different from USB-FDD/HDD, these can be removed before continuing setup). BTW3: Windows 98se on a Memdrive can be used together with R. Loew’s 32-bit and/or 64-bit Ramdrive(s) for more space. I set the Swapfile to a 2GB Ramdrive with the 32-bit RAMDISK and used the remaining memory for another Ramdrive with the 64-bit RAMDISK. BTW4: Following – annotated - MSBATCH.INF makes also mandatory or optional/ desired changes to MSDOS.SYS, CONFIG.SYS, AUTOEXEC.BAT and SYSTEM.INI. According to Q188101 it’s only possible to write twelve characters for filename using DevAddDev in MSBATCH.INF – no Drive/ Path, so files must reside in the Root. See: http://www.c-bit.net/Q188101/DE-DE (not found in English). Same turned out to be true for CmdAdd, but files can be in Path too. --------------------------------------------------------------------------------- MSBATCH.INF ------------------------------ ;; MSBATCH.INF ;; ;; Copyright (c) 1995-1999 Microsoft Corporation. ;; All rights reserved. ;; ;; Comments always BEFORE a command [BatchSetup] Version=3.0 (32-bit) SaveDate=01/15/20 [Version] Signature = "$CHICAGO$" [Setup] Reboot=0 ;; Never set System=0, MBR=0 or CleanBoot=1 [Install] UpdateInis=Edit.Sysini,Edit.Dossys UpdateCfgSys=Edit.Cfgsys UpdateAutoBat=Edit.Autobat [Edit.Sysini] ;; Mandatory - unless other methods are used %10%\system.ini,386Enh,,"MaxPhysPage=40000" ;; Optional ;; Convenient while copying whole Memdrive %10%\system.ini,386Enh,,"PagingDrive=C" ;; If using R. Loew’s RAMDISK ;;%10%\system.ini,386Enh,,"PagingDrive=S" ;; Watch free space on Memdrive %10%\system.ini,386Enh,,"ConservativeSwapfileUsage=1" %10%\system.ini,386Enh,,"DMABufferSize=64" ;; Watch use of System Arena ;; If MaxFileCache is below 1/24 of MEM, MinFileCache is mandatory %10%\system.ini,vcache,,"MinFileCache=1024" %10%\system.ini,vcache,,"MaxFileCache=1024" ;; If using R. Loew’s RAMDISK (simple method) ;;%10%\system.ini,386Enh,,"device=prothook.VXD" [Edit.Dossys] ;; Optional but convenient %30%\msdos.sys,Options,,"BootMenu=1" %30%\msdos.sys,Options,,"BootMenuDefault=5" %30%\msdos.sys,Options,,"BootMenuDelay=30" %30%\msdos.sys,Options,,"SystemReg=0" %30%\msdos.sys,Options,,"Logo=0" [Edit.Cfgsys] ;; Mandatory DevAddDev=HIMEMX.EXE,device,, ;; If using R. Loew’s RAMDISK ;;DevAddDev=HIMEMEX.SYS,device,, ;; One of both drivers needed in case of CD-ROM install ;;DevAddDev=XDVD2.SYS,device,,"/D:MSCD001" ;; Watch conventional memory! ;;DevAddDev=OAKCDROM.SYS,device,,"/D:MSCD001" [Edit.Autobat] ;; Optional, very convenient CmdAdd=doskey.com,"/insert" ;; One of both CD extensions needed in case of CD-ROM install ;;CmdAdd=Shcdx33f.com,"/D:MSCD001 /L:U /~+" ;; Optional CmdAdd=SMARTDRV.exe,"/X C+ /B:57344 /V" ;; Grub needs enough conventional memory - smaller Smartdrive Read-Ahead buffer! ;;CmdAdd=mscdex.exe,"/D:MSCD001 /L:U /M:20" ;;CmdAdd=SMARTDRV.exe,"/X C+ /B:32768 /V" ;; If using R. Loew’s RAMDISK ;;CmdAdd=ramdsk32.com,"S: 2097152" ;;CmdAdd=ramdsk64.com,"T:" ;; Inf,Reg and BAT files need always a Carriage Return on the end! Thank you, LoneCrusader! ;; Better use two semi-colons if using Windows 10 Notepad ---------------------------------------------------------------------------------
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