First post, by jolurove
So I recently got this motherboard M912 v:1.4 http://motherboards.mbarron.net/models/486vlb3/m912v14.htm, it came with a 486DX2 66, and a nice Cirrus Logic VLB graphics card, as well as a VLB controller card with 2 IDE channels, but no sound card (everything for 20 euros 😊 😎 )
So I swapped, the CPU for a DX4 100 and I plugged an AWE64 value, so I could finally play Warcraft II: Tides of Darkness without the annoying super fast scrolling you get on pentiums and onwards. But to my dismay, I got some very annoying crackling noise (only with FX, CD music, as well as MIDI work fine). I figured it may be some compatibility issue, so I swapped the card for a Vibra 16 and got the same result, then I tried an Awe 32, a SB16, another Awe64, so I thought it may had something to do with Creative cards, so I tried a Yamaha Audician 32. I got the same problem with all of them. So I started playting around with IRQs and DMAs. Tried all the ISA slots, and same result. All of the cards work fine (I even tried them on another 486 system). You think it may be a chipset issue?? I ran out of ideas. 😵 😢
On a side note, when I used a P24D on write back mode, the turbo button doesn't work, the system freezes and when I unpreess it it continues working normally, I guess these old motherboards can be capricious some times.
