Reply 200 of 245, by 640K!enough
What is the goal with this design? From the recent image, I can see that there is an OPL4 with flash, presumably for instrument data. Will you be exposing the OPL4 directly at all, or only as an MPU-401 device via the YMZ290? Are you planning to use the FM portion at all? Is the CPLD just for bus logic and glue, or other tasks as well?
On the software side, are you planning to try re-using the SW20 TSR, writing your own, or doing MPU-401 in your firmware?
I don't know what you're planning with this, but it is already starting to look interesting.