YMF754 Datasheet, PDF (33/60 Pages) YAMAHA CORPORATION – DS-1E

YMF754
2-1. FM Synthesizer Block
FM Synthesizer 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 FM Synthesizer.
FMBase
FMBase
FMBase+1
FMBase+2
FMBase+3
(R)
(W)
(R/W)
(W)
(R/W)
Status Register port
Address port for Register Array 0
Data port
Address port for Register Array 1
Data port
The following shows the FM Synthesizer Block registers.
2-1-1. Status Register
FM Synthesizer Status Register (RO):
Address
D7
D6
D5
D4
xxh
IRQ
FT1
FT2
-
D3
D2
D1
D0
-
BUSY
-
BUSY
June 28, 1999
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