On DOS ? Dr. Hardware ?

Windows 3.x/2.x..
Re: Best PCI VGA card for Windows 3.11 performance?
Re: Best PCI VGA card for Windows 3.11 performance?

Jo22 wrote:

On DOS ? Dr. Hardware ?

Looks like just a sysinfo program, I can't see any options to test video RAM integrity, or enter various video modes.

VBETEST (a part of UniVBE) seems OK for testing various video modes, but I can't see it doing any video RAM tests.

there's whatvga.exe, which can be found here: https://github.com/achernya/iap-6.828-website … hardware/vgadoc
and here https://pdos.csail.mit.edu/6.828/2018/reading … ardware/vgadoc/

this one is useful because it'll show you what modes you have available, and will let you do drawing tests in each mode.

I am not sure if it does video RAM tests, however if you look there's a util called dmpmem.exe which creates 2 files; both have .ROM extension, one is binary, the other is this text:
INT 10h = F000:1300
INT 6Dh = F000:1060
State Table = C000:2E8F
FNT0 = C000:0500
FNT1 = C000:1700
FNT2 = C000:0900
FNT3 = C000:0100
FNT4 = C000:0500
FNT5 = C000:2710
FNT6 = C000:1700
FNT7 = C000:2710
more info on this in whatvga.doc

there's also this one I remember from back in the day, this is the source: http://www.vbforums.com/attachment.php?attach … 39&d=1082326758
this compiles to an executable I have called vesabase.exe which I have used, but can't find anywhere on the internet

The above don't seem to perform video memory test, and this is the most important feature I'm looking for.
I want something like MemTest86 (comprehensive testing using various patterns), but for video RAM, rather than system RAM.

X-VESA can test all video memory available.

X-VESA seems interesting indeed, but there's one problem - it uses a non-standard 90x30 text mode for menus, and I've already found one card where that mode fails to work correctly.
So I'm still looking...