First post, by hydroksyde
I'm currently working on a 486 build... but this one problem has me tearing my hair out, and nothing I've tried seems to change anything
Whenever I have an SB16 type ISA sound card installed alongside a VLB video card, I get palette corruption when sounds play, as these youtube videos show
https://www.youtube.com/watch?v=LLPUjsNdQzA
https://www.youtube.com/watch?v=6lau6JrPBeI
It seems to happen with any SB16-like card - I've tried with a Sound Blaster Vibra16s (CT2900), and a Terratec Base1
The only way to fix this is to disable sound in the game (MIDI music is no problem though), use an ISA video card, or use a different motherboard. The board I'm using is a Mitac PH4500AU with a UMC 881 chipset.
I've tried with an Intel 486DX2, as well as an AMD 5x86-133. I've tried both parity fast page memory and non-parity EDO, and I've tried disabling the cache and fiddling with many different jumpers/bios settings and retesting. I have also tried changing IO address, IRQ, and DMA on the sound card but nothing seems to work!
I'm running MS-DOS 7.10. Windows 95B is installed but doesn't load automatically, and it seems to make no difference whether this is done in pure dos mode or from inside windows.
Does anybody have any clue what this problem could be, and where I might start looking?