At the very least, this means rolling back the recently added option to send the FM and PSG signals separately to be mixed by an external mixer under I2C control.TomXP411 wrote: ↑Wed Apr 05, 2023 5:14 pmThere's no reason to do that. VERA already has a DAC. An FM VERA would just make use of that.BruceRMcF wrote: ↑Wed Apr 05, 2023 1:21 pm Even worse, since the YM2151 and its DAC is a set, and if you cannot assume that the YM2151 is available you cannot assume that its dedicated DAC is available, so you couldn't just bring out digital outputs from the FPGA, you'd need to do a DAC on the daughterboard so now you are sending the YM analog audio lines through to the mixer on bodge wires so somewhere on the audio out traces from the OPM's DAC.
I don't know whether that is a drop dead problem, but it's an issue that comes up if the idea comes up to hunt around for an FPGA with enough logic resources and also with 1MBit of RAM of some sort (in addition to the other memory resources needed for the PCM queue).
After all, this is Dave's dream computer, not mine, and in addition to being the 8-bit Guy, he's also the 8-bit Keys guy.