Yesterday I got a new Dallas DS12887a RTC for my P-133. It originally had a VIA82887-based HT12888a. Even though I've read in se […]
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Yesterday I got a new Dallas DS12887a RTC for my P-133. It originally had a VIA82887-based HT12888a. Even though I've read in several places that they are not 100% compatible, the PC works fine with it. And yes, I knew I could try modding the original RTC adding an external battery... and I actually tried that a while ago, but I was a bit careless then and broke one of the battery pins, so I had no choice but to replace it.
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I also got this Media Magic Audio16c ISA sound card. Apparently, this is a very close clone of the OPTi 82c929a-based Turtle Beach Monte Carlo... I even used the Monte Carlo's drivers successfully. My only gripe with this card are the crystals: this one has taller crystals than the ones in Monte Carlo, so it interferes somewhat when mounting a WT daughterboard. Might replace them in the future. Also getting this thing going was a bit finicky... I had to assign IRQs, DMAs and port adresses manually in my Compaq's BIOS. This thing needs 3 IRQs (one for SBPro, one for WSS and one for MPU401, and the driver craps out if you try using the same one between two of them)!
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This board impressed me: Media Magic apparently copied Turtle Beach very well. The Line Out is cleaner than my YMF719-s cheap card (which wasn't bad in the first place), WSS doesn't give me weird crashes in Warcraft II and SBPro mode doesn't sound as... harsh? Anyway, does anyone know how to switch from SBPro mode to WSS mode from the command line? Unlike the YMF719, this doesn't switch automatically. Also, I had issues using he SBPro part in IRQ5, as this worked in pure DOS but the Windows drivers did not work correctly with it, IRQ7 is trouble-free. Also, does anyone know why this board needs a separate IRQ for the MPU401?