China DOS Union

1. I used SciTech Display Doctor 6.53 for dos (SDD653 for short), and found that it cannot detect my S3 SAVAGE chip, so of course it cannot provide a high refresh rate;
2. The SciTech Display Doctor 7.0 beta 3 (SDD7 for short) I used has already expired, and now I cannot use software to make my graphics card support VBE3.0. (The SDD7 download link on Wengier's website is no longer valid).
3. I used SciTech SNAP Graphics 2.0 for dos (SNAP2.0 for short), and this software also cannot detect my display chip.
On the official SDD and SNAP websites at www.scitechsoft.com there are usage instructions for SDD and SNAP2.0, but they are all in English, so I can't fully understand them. Anyone interested can go take a look.



I found that after booting msdos7.1, the default resolution and refresh rate are 720x400@70hz. But as soon as I start ucdos or Tianhui, the display mode changes to 640x480@60. Anyone interested can check the display mode with the monitor's control buttons after booting msdos7.1.



I have still not managed to successfully get an 85hz refresh rate in DOS.
Wengier provided a solution to this problem: first use SDD to make a graphics card that does not support VBE3.0 support VBE3.0, then use unirfrsh.com to get an 85hz refresh rate (note: to run unirfrsh.com, the graphics card must support VBE3.0).
But after following the above plan, when I run ccdos and Disk Genius and the graphical interface appears, I can clearly feel that the graphics are flickering (anyone who often uses a high refresh rate can tell at a glance).

Question:
1. Would interested members please start ccdos or diskgenius or other software with a graphical interface under dos, and see what the refresh rate is at that time?
2. How can I make the screen stop flickering after starting ccdos or diskgenius, that is, achieve an 85Hz refresh rate under dos?

1. It's 60Hz
2. Don't know, and don't want to know. Because I use an LCD monitor

This is very interesting

No matter what the result is, everyone come and say something. You wouldn't willingly make your eyes suffer just because you like DOS, would you

If UniRfrsh doesn't work, then try VBEHZ and the like.

TO Wengier：

1. Try running software under dos such as Tianhui, ccdos, ucdos, diskgen and others whose startup interface is graphical; I want to know what your computer's refresh rate is after starting these programs?
2. I now suspect that the 60hz refresh rate after running the above four kinds of software may be related to unirfrsh.com.
I feel that the graphical interfaces after starting the above four kinds of software use the mode "640*480@4-color", while the setup program of unirfrsh.com cannot support this display mode; the minimum it supports is "640*480@8-color". Therefore, after running DISKGEN and similar software, unirfrsh.com does not actually take effect, and what takes effect for "640*480@4-color" at that time is DOS's default "display driver program (VGA)".
I am also unclear about some details in the above view, but that is roughly what I mean.

That's pretty difficult, I'll go back and try it.

The following is quoted from dosguest's post on 2003-4-13 14:01:32:
TO Wengier：

   1. Try running software under dos such as Tianhui, ccdos, ucdos, diskgen and others whose startup interface is graphical; I want to know what your computer's refresh rate is after starting these programs?
   2. I now suspect that the 60hz refresh rate after running the above four kinds of software may be related to unirfrsh.com.
   I feel that the graphical interfaces after starting the above four kinds of software use the mode "640*480@4-color", while the setup program of unirfrsh.com cannot support this display mode; the minimum it supports is "640*480@8-color". Therefore, after running DISKGEN and similar software, unirfrsh.com does not actually take effect, and what takes effect for "640*480@4-color" at that time is DOS's default "display driver program (VGA)".
    I am also unclear about some details in the above view, but that is roughly what I mean.

It really is 60hz.

Under dos, with an LCD screen the refresh rate is 60hz, but under windows there is no flicker when the refresh rate is 60hz! So clearly the driver is treating the LCD as a CRT. It's still a driver problem.