Sound Blaster 16: Difference between revisions

===Programming DMA===

This ports are for channel 1 (8 bit transfers), if you want use another channel, check [http://homepages.cae.wisc.edu/~brodskye/sb16doc/sb16doc.html]

# Disable channel by writing to port 0x0A value (channel number + 0x04)

# Write value to flip-flop port 0x0C (any value e.g. 1)

# Send transfer mode to 0x0B (0x48 for single mode/0x58 for auto mode + channel number)

# Send page number to 0x83(page port of channel 1) For example if you have sound data at 0x100450, page is 0x10.

# Send low bits of position to port 0x02(pos. port of channel 1) For example(see above) is 0x50.

# Send high bits of position to port 0x02(pos. port of channel 1) For example(see above) is 0x04.

# Send low bits of lenght of data to port 0x03(count port of channel 1) For example if is lenght 0x0FFF, send 0xFF

# Send high bits of lenght of data to port 0x03(count port of channel 1) For example if is lenght 0x0FFF, send 0x0F

# Enable channel by writing channel number to port 0x0A