YMF724F
2-1. OPL3 Block
OPL3 Block is register compatible with YMF289B. However, Power Management register has been deleted because it is now controlled by the PCI Configuration Register.
The following shows the FMBase I/O map of OPL3.
FMBase | (R) | Status Register port |
FMBase | (W) | Address port for Register Array 0 |
FMBase+1 | (R/W) | Data port |
FMBase+2 | (W) | Address port for Register Array 1 |
FMBase+3 | (R/W) | Data port |
The default FMBase value is 0x0388.
The following shows the OPL3 Block registers.
OPL3 Status Register (RO):
Address
D7
D6
D5
D4
D3
D2
D1
D0
xxh
IRQ
FT1
FT2
-
-
BUSY
-
BUSY
September 21, 1998
