YMF744B ETC [List of Unclassifed Manufacturers], YMF744B Datasheet - Page 36

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

YMF744B
2-2. Sound Blaster Pro Block
This block emulates the DSP commands of Sound Blaster and Sound Blaster Pro. Only playback
functions are supported (record functions are not supported). However, to maintain compatibility for
games, it is designed so that every DSP command receives a correct response.
The DMA transfer of this block uses PC/PCI or D-DMA protocol.
The following shows the SBBase I/O map of SB Pro.
SBBase
SBBase
SBBase+1h
SBBase+2h
SBBase+3h
SBBase+4h
SBBase+5h
SBBase+6h
SBBase+8h
SBBase+8h
SBBase+9h
SBBase+Ah
SBBase+Ch
SBBase+Ch
SBBase+Eh
(R)
(W)
(R/W)
(W)
(R/W)
(W)
(R/W)
(W)
(R)
(W)
(R/W)
(R)
(R)
(W)
(R)
FM Synthesizer Status port
FM Synthesizer Address port for Register Array 0
FM Synthesizer Data register
FM Synthesizer Data port
SB Mixer Data port
SB DSP Reset port
FM Synthesizer Status port
FM Synthesizer Data port
DSP Read Data port
DSP Write-buffer status port
DSP Write Command/Data port
FM Synthesizer Address port for Register Array 1
SB Mixer Address port
FM Synthesizer Address port for Register Array 0
DSP Read-buffer status port
-36-
February 3, 1999