ruthan Posted August 16, 2017 Posted August 16, 2017 Hello, i have annoying problem with i dont know from old machines, its that when i start command.com in safe mode and i getting black screen.. My have 2 suspicion bug in Nvidia unofficial drivers or problem with LCD of refresh rate detection, i heard that that Dos is written for 70Hz i have 60Hz HP LP2475w connected to DVI and Dell 2007PF.
rloew Posted August 16, 2017 Posted August 16, 2017 Are you referring to running command.com from Windows in Safe Mode or running command.com from "Safe Mode Command Prompt Only" in the Boot Menu?
jaclaz Posted August 16, 2017 Posted August 16, 2017 33 minutes ago, ruthan said: Hello, i have annoying problem with i dont know from old machines, its that when i start command.com in safe mode and i getting black screen.. My have 2 suspicion bug in Nvidia unofficial drivers or problem with LCD of refresh rate detection, i heard that that Dos is written for 70Hz i have 60Hz HP LP2475w connected to DVI and Dell 2007PF. I heard that it was written for 72 Hertz, instead . It would make more sense since 36, like 60, has more integer divisors than 35. jaclaz
ruthan Posted August 16, 2017 Author Posted August 16, 2017 (edited) Quote I heard that it was written for 72 Hertz, instead . It would make more sense since 36, like 60, has more integer divisors than 35. And magic solution, or only new monitor is can help me? I have old big CRT in the garage in 1 my lair, but i want to give it change, when Win98 would be up and running.. Maybe as in old days, i can try overclock monitor by powerstrip or something like that, i did it for CRT.. when 70,75Hz were killing my eyes and 5,10Hz more were nice. BTW what lines as this in autoexec / config, i never need to understand it, think about it, its Windows 98 related, or its Dos thing not related to my problem? deviceHIGH=C:\WINDOWS\COMMAND\display.sys con=(ega,,1) Other strange this that if not wrong is not working even with standart PCI driver.. Edited August 16, 2017 by ruthan
rloew Posted August 17, 2017 Posted August 17, 2017 The non-UEFI BIOS and DOS use IBM Mode which is 70Hz. My ex-girlfriends TV did not support it so she could not see the BIOS or DOS during Boot. I added an Overlay to her Multi-Boot Profile to switch to an usable Mode Setting before booting DOS.
ruthan Posted August 18, 2017 Author Posted August 18, 2017 Quote I added an Overlay to her Multi-Boot Profile to switch to an usable Mode Setting before booting DOS. That its exactly means and could it be solution for me too?
rloew Posted August 18, 2017 Posted August 18, 2017 Possibly. You still would not be able to see your BIOS screens though.
ruthan Posted August 19, 2017 Author Posted August 19, 2017 (edited) Quote Possibly. You still would not be able to see your BIOS screens though. See Bios and Dos mode from Windows 98 is working, but i start command.com from Windows 98 im getting black screen, even safe mode. Maybe its drivers bug, VBE drivers has thing as known bug.. so it could be same with UND 82.69.. Edited August 19, 2017 by ruthan
rloew Posted August 20, 2017 Posted August 20, 2017 VBE does not work with COMMAND.COM. Safe Mode does not use Installed Drivers so neither VBE nor 82.69 are a factor. It can use limited Drivers specified in SYSTEM.CB. This allows SVGA and XGA, but not on all Video Cards. Use the original SYSTEM.CB File for Safe Mode.
ruthan Posted August 20, 2017 Author Posted August 20, 2017 Quote Safe Mode does not use Installed Drivers so neither VBE nor 82.69 are a factor. There other know limitation of 82.69? Couldnt be that safe mode bug be fixed? Quote It can use limited Drivers specified in SYSTEM.CB. This allows SVGA and XGA, but not on all Video Cards. Use the original SYSTEM.CB File for Safe Mode. I never did anything with SYSTEM.CD, how to use it for Safer mode?
rloew Posted August 20, 2017 Posted August 20, 2017 Safe Mode does not use the 82.69 Driver so there is nothing to fix. SYSTEM.CB can be modified to provide SVGA or XGA Graphics in Safe Mode. Some Video Cards will crash if you open COMMAND.COM.
ruthan Posted August 21, 2017 Author Posted August 21, 2017 Quote Safe Mode does not use the 82.69 Driver so there is nothing to fix. Or thanks, sorry i didnt get original wording.. So were could be problem with command.com in safe mode? Its clean installation, 2 different, both with Geforce 7950GT or with VBE (it means Radeon X1300 not supported Win98 card). When i trying to start command.com - i when safe mode warning, i click OK and whole screen is getting black, like would try to run not in windows but in fullscreen, it seems to, that machine is still running, but monitor is black.. Is there any dos command for example to play PC speaker sound to test that otherwise is computer working?
jaclaz Posted August 21, 2017 Posted August 21, 2017 7 hours ago, ruthan said: Is there any dos command for example to play PC speaker sound to test that otherwise is computer working? echo ^G (that is CTRL+G). jaclaz
ruthan Posted August 21, 2017 Author Posted August 21, 2017 Here it is, system.cb Quote echo ^G (that is CTRL+G). CTRL+G - nothing or its too silent, i have found a bit damaged pc speaker, computer that beep is quite silent on it. SYSTEM.CB-AMD970-160GB
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