1st1 wrote:The important question for such a YM dropin replacement in ST is that it is still able to control the floppy and printer port, fully compatible to TOS?
yogi2015 wrote:Hi soviet9922. Yes if this could be used with ST, would be excellent Would seem to be, but the manual is in Russian. Will try to find a PDF translation app.
There doesn't seem to be a board in production ATM, and not even sure if NedoPC would be willing to deal with/ship internationally. The design is documented and posted on the velesoft site, but not sure if it is open source; I would consider doing a Eagle layout if it is (only PDF for the schema, so would have to transcribe into CAD).
Not sure on how it's installed, but seems to plug into the AY socket. The additional register addresses are decoded by the CPLD, I think. So it would depend on the mem map of the ST and how close or different to the Speccy; I'm sure there will have to be changes to the .jed file.
Well, lots to think about,
Stefan jL wrote:If i understand correctly so are you doing an emulated ym2149 in an CPLD? Then you don't need to limit to the ym2149 and instead add the AY8930
soviet9922 wrote:This thing could be made to work on the st parallel port ?
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