nesdev.org

One note-on is 4 registers (2x operator levels, frequency lo bits, frequency hi bits) which comes to 8x SPI transfers (estimating ~40 micros) + 4x OPL2 delays (~120 micros) = ~160 micros. So a four note chord is already ~640 micros of processing, not counting the rest of the program. 31250 baud is a...

Hello. I'm working on an OPL2 + Atmega based MIDI synth, and having trouble keeping up with incoming MIDI while sending commands to the OPL2, which requires delays between writing address and data values. In the simple case it works fine but with lots of incoming note and CC messages, the serial rx ...