Specifications

A-8 Sound Blaster I/O Address Maps
SBPRO MCV I/O Address Map
Sound Blaster Pro for Micro Channel Version uses base I/O address 220h or 240h.
These are jumper selectable.
Base Address I/O Addresses Used
220h 220h to 233h
240h 240h to 253h
Table A-12: SBPRO MCV I/O Ports
The following table lists the functions of the I/O ports:
I/O Address Description Access
Base + 0h FM Music Status Port Read
Base + 0h FM Music Register Address Port Write
Base + 1h FM Music Data Port Write Only
Base + 2h Advanced FM Music Status Port Read
Base + 2h Advanced FM Music Register Address Port Write
Base + 3h Advanced FM Music Data Port Write Only
Base + 4h Mixer chip Register Address Port Write Only
Base + 5h Mixer chip Data Port Read/Write
Base + 6h DSP Reset Write Only
Base + 8h FM Music Status Port Read
Base + 8h FM Music Register Port Write
Base + 9h FM Music Data Port Write Only
Base + Ah DSP Read Data Port Read Only
Base + Ch DSP Write Command/Data Write
Base + Ch DSP Write-Buffer Status (Bit 7) Read
Base + Eh DSP Read-Buffer Status (Bit 7) Read Only
Base + 10h Reserved
Base + 11h Reserved
Base + 12h Reserved
Base + 13h Reserved
Table A-13: SBPRO MCV I/O Port Functions
FM music can also be accessed through I/O
addresses
388h and 389h.
I/O addresses from 38Ah to 39Fh are reserved for future expansion.