First post, by adalbert
Hello,
I just got a Slot 1 mainboard with Intel 440ZX chipset (BX limited to 2 memory slots). It has nice small form factor, ISA slot and onboard CMI8338A/PCI sound module. Unfortunately, it seems that that sound card is very problematic. I tried it in pure DOS with setaudio utility, and it was detected, but there was no sound at all. Later i tested it in Win 98 and drivers installed without problem, but there was no sound. I was able to see the card in device manager, I could adjust the volume etc. but tere was only absolute silence. I notice that it uses the same IRQ as USB controller. It is IRQ10 by default, i tried reserving it in BIOS and the card was asigned to IRQ5, and the USB controller also got IRQ5. And there are no options in BIOS to disable USB controller or onboard sound card.
The BIOS string is i440ZX-W977EF-2A69KPWBC-00 and there is a sticker with 'KM6ZMS' text on a ISA slot. I tried googling it and i noticed that some people say that it's the same mainboard as protac mx320 or PC chips M761. I only managed to find a manual for M761 mainboard and, while it looks really similar, the jumper and headers have different markings. Does anyone have a manual for my mainboard? Maybe there is a BIOS update? I would like to be able to fix the problems with sound card, or turn it off, so I can put something in the ISA slot.
Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg