I am currently also playing with my Cirrus Logic CL-GD5422 card (photo attached), and I am not sure it is able to do 1024x768 as progressive. When I initialize any SVGA modes for 1024x768 (using its "proprietary SVGA mode numbering", haven't tried VESA modes), I always get an interlaced output. (does Windows support interlaced video?)

Though on the 800x600 front, it does give me 16, 256, 64K and 16M colors as progressive. So would expect for Windows to be able to support that at least. Attached supported resolution table for Cirrus Logic from the book "Programmers Guide to the EGA, VGA and SuperVGA cards", which does confirm it should be able to reach such resolutions, and higher.

Try maybe a UniVBE mode utility, or some other DOS tool that allows testing Super VGA modes? (e.g. Pinball Illusions has a 800x600 SVGA mode it supports)

1MB of VRAM should be enough to support 800x600@64K (800*600*2=960000 bytes), and 1024x768@256 colors (1024*768=786432 bytes).

Looks like the monitor type is set to plain VGA - "clmode m0"
Try some other number...

1Type  Example      HFreq  VFreq   Resolution
2 #                 (kHz)   (Hz)
3====  =======      =====  =====   ===========
40     IBM 8512     31.5   60/70  640x480, 720x400
5      IBM 8503
6      IBM 8503
7
81     IBM 8514     31.5   60/70  640x480, 720x400
9      IBM 8515     35.5   43.5    1024x768 interlaced
10
112     NEC 2A      31.5   60/70   640x480, 720x400
12                   35.1   56      800x600
13
14
153     NEC II        31.5   60/70   640x480, 720x400
16                   35.1   56      800x600
17                   35.5   43.5    1024x768 interlaced
18
19
204     NEC 3D       31.5   60/70   640x480, 720x400
21                   35.5   43.5    1024x768 interlaced
22                   37.8   60      800x600
23
24
255    Sony CPD-1304 31.5   60/70   640x480, 720x400
26     NEC 3FGx       48.0   72      800x600
27     Nanao 9065S   48.0   60      1024x768
28     Nanao 9070U   48.0   43.5    1280x1024 interlaced
29 
30                                                                         
316    NEC 4D        31.5   60/70   640x480, 720x400
32     NEC 4FG       48.0   72      800x600
33     Nanao T240i   56.5   70      1024x768
34                   48.0   43.5    1280x1024 interlaced
35
36
377    NEC 5D        31.5   60/70   640x480, 720x400
38     NEC 5FG/6FG  48.0   72      800x600
39     Nanao T560i   56.5   70      1024x768
40     Nanao T660i   64.0   60      1280x1024
41     Nanao F550i
42     Nanao F750i
43     Nanao 9400i
44     Nanao 9080i

Grzyb wrote on 2022-10-22, 09:32:

Looks like the monitor type is set to plain VGA - "clmode m0"
Try some other number...

Where should I set that? system/win.ini or somewhere else?

GoldenPentium wrote on 2022-10-22, 15:49:

Where should I set that? system/win.ini or somewhere else?

In DOS, preferrably AUTOEXEC.BAT

Grzyb wrote on 2022-10-22, 15:52:

GoldenPentium wrote on 2022-10-22, 15:49:

Where should I set that? system/win.ini or somewhere else?

In DOS, preferrably AUTOEXEC.BAT

Well, clmode did the trick. Thank you!

using a Cirrus Logic 5422 with 1 MB.

I'm following this document:
https://files.support.epson.com/pdf/en____/en____us.pdf

In autoexec.bat:
clmode 3+ m7+

Which reports: "high refresh mode set, super multi frequency monitor".
I also tried m1 through m6, but no luck.

In Windows 3.1, the Multiresolution driver 1.1 is installed.
Resolution is set to 800x600 with 64k colors using the SetRes utility (video mode 65).
The [CLVGA] section in system.ini has no option for setting a refresh rate, and if it is possible, it is not documented.

Yet Windows 3.1 still runs at an eye-straining 56 Hz. Any ideas?

I'm afraid that card can't do 800 x 600 x 64K with more than 56 Hz.

Try UniVBE/SDD to see what refresh rates are available.

If the hardware seems capable of more, you can try different drivers - eg. the attached stuff I got with a Machspeed VGA 1000 card, also based on CL-GD5422.

It is capable of 800×600×64K @ 72 Hz. I successfully used OpenGEM 6 with the GEM driver on the same machine. The GEM driver seems to respect the refresh rate settings I configured via CLMODE.
The newer CLMODE version with the Tx= switches doesn’t help under Windows 3.1 either.
It seems this is a bug in the 3.1 driver version 1.1, which was fixed in later revisions (1.41, 1.50) - but those use 386 opcodes. I didn't come across a 2.0 driver yet, which might be still 286 compatible.

The driver v1.1 I am using:
https://www.retrospace.net/infoseiten/downloa … n=get&dlid=2014

Your attached driver seems to be v1.2 - I will give it a try.

Hm, sadly, Win3.1 gets stuck on the loading screen using your v1.2 driver. Seems I have to stick to v1.1 with 56Hz.

freaked wrote on 2025-08-05, 11:22:

Hm, sadly, Win3.1 gets stuck on the loading screen using your v1.2 driver. Seems I have to stick to v1.1 with 56Hz.

There's a nice collection of drivers tested for 286 compatibility - Re: Should a Diamond Speedstar Pro (CL-GD5426) work in Win3.1 in 286 real-mode?

The only 5422 driver is v1.1, so I guess no hope...