mem-map.md 190 B
0x00 CSR (R)
0x01 Volume (W)
[31:16] Volume channel 1
[15: 0] Volume channel 0
0x4000 is 0dB
0x02 Sample FIFO (W)
[31:16] Channel 1
[15: 0] Channel 0
PCM 16 bit signed