r305: Mach64 SVGA display messed up changing CPU freq

[startmenu]

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When changing CPU frequency, Mach64 SVGA display messes up while S3 Trio family is still normal.

update: Happens in Mach64 32-bit color mode only and previous reversions also have this issue

[ppgrainbow]

Uh oh! That doesn't sound too good. I sure hope that the display corruption issue gets fixed soon.

[startmenu]

Update: not only changing CPU frequency, even closing PCem config window by clicking "ok"(with nothing changed) messes the display up.

[Battler]

Seems to be a bug with the Mach64 emulation. And not the only one. If you look back enough on this forum, you'll see threads about the DOS prompt in a window on Windows 9x causing awful render issues on the Mach64.

[nerd73]

Update: not only changing CPU frequency, even closing PCem config window by clicking "ok"(with nothing changed) messes the display up.

I can confirm this when running 98SE in PCem.

CPU: Pentium Overdrive 83/Am5x86 P75/Cx5x86 133.
RAM: 64 MB
GPU: Mach64.

[ppgrainbow]

I can confirm this when I'm even running MS-DOS 6.22 when I switched from the Number Nine FX to the ATI Graphics Turbo Pro with 4 MB VRAM on the Award SiS 496/497 machine.

When I try to install the Mach64 drivers under MS-DOS, the setup is unable to initalise the EEPROM and PCen crashes with the following error found in the pc.log file:

Bad getpccache 000BABD0

Let's hope that this bug in the Mach64 SVGA driver gets fixed! I don't know if I can reproduce this error when I attempt to install the VBE driver as well.

[SarahWalker]

Rev 333 should fix this.

[ppgrainbow]

Rev 333 should fix this.

Thanks for fixing the SVGA display on the Mach64.