This RAM board also needs the additional Gary address patch board that makes Gary think all fastram accesses is in the 0x200000 area. A better solution is of course to use OVR signal, but this was my first go at this, so I did not know better then. On the bright side, the solution works, and it does not require soldering any wires to the A500 board, and its fully DMA compatible with A590 if its internal memory is disabled.
Please study the text in the schematics files for details. The latest PLD files included
facilitates support for IDE68K and CDTV, but this is only confirmed working by other
users.
@_arti, post #5
@_arti, post #7