YMF744B ETC [List of Unclassifed Manufacturers], YMF744B Datasheet - Page 34

• Manufacturer Part Number: YMF744B
• Description: DS-1S
• Manufacturer: ETC [List of Unclassifed Manufacturers]

YMF744B
2-1. FM Synthesizer Block
2-1-1. Status Register
FM Synthesizer Status Register (RO):
Address
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.
The default FMBase value is 0x0388.
The following shows the FM Synthesizer Block registers.
xxh
FMBase
FMBase
FMBase+1
FMBase+2
FMBase+3
IRQ
D7
FT1
D6
(R)
(W)
(R/W)
(W)
(R/W)
FT2
D5
Status Register port
Address port for Register Array 0
Data port
Address port for Register Array 1
Data port
D4
-
-34-
D3
-
BUSY
D2
D1
-
BUSY
D0
February 3, 1999