digistorm wrote on 2021-07-04, 13:32:
If the goal is preservation, it would maybe be better to preserve the original GUS (GF1 chip) because that one is more essential to run demo’s. And maybe reimplementation would also be a good idea because Interwave chips will not be around forever.
eeguru from the vcfed forums is actively making just such a thing. You can have a look here for more info, the video is pretty long but interesting. :
https://www.schrankmonster.de/2019/10/15/one- … -rule-them-all/
It's gone rather quiet on that front though.
I'm finally getting my own card courtesy of someone on ebay selling this for a reasonable price. I never thought I'd find one. This thread has been great for figuring out how I could put 2MB of RAM on there instead of the currently empty 512KB RAM footprint. Really hoping it gets here in one piece and actually works:
Many thanks to shock__ for sharing some of the prototype pictures - this one here confirms that it's possible to get a 42pin soj working on the 40pin footprint as long as those extra address lines are hooked up without shorting VCC/ground:
It's kind of rekindled my interest in having a go at making my own one though, the chips can still be had internationally for about $20. There's enough info in this thread for the now no-longer-available gusar to have been made to a reasonable standard. Personally I'd like a combo OPL3-SAx & GuS if it's possible, kind of like a Gus extreme. With the pin density of the SMD chips, it would be worth learning how to use solder paste + stencil.
Also there are now quite a few cards I can look at for reference that aren't a GuS, there's this cool 8-bit ES1868 sound card: https://github.com/hkzlab/ES1868_ISA8 and some PC104 implementations of the later 'all-in-one' ISA soundchips like this one that rasteri shared after making one for his tinypc build 😀 : Open Source PC104 Soundcard