I'm trying to use Micro SwinSID to replace a genuine SID chip in the BeebSID board, which basically interfaces a standard SID to the 1MHz bus of a BBC microcomputer.
I have the board built and it appears to work, however, if I play a SID file it plays perhaps 10% too slow, where it would play at the normal speed on a normal SID.
Firstly can anyone comfirm the fuse settings I need for the AVR, currently I have : SPI enebled, external clock (32MHz module). Note CLKDIV8 is disabled so it should be running at full 32MHz.
I've attached the schematic of the circuit I am using, if anyone can spot anything wrong with it.