YMF754 Datasheet, PDF (35/60 Pages) YAMAHA CORPORATION – DS-1E

YMF754
2-2. Sound Blaster Pro Block
Sound Blaster Pro 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)
(R/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 Address port for Register Array 1
FM Synthesizer Data port
SB Mixer Address port
SB Mixer Data port
SB DSP Reset port
FM Synthesizer Status port
FM Synthesizer Address port for Register Array 0
FM Synthesizer Data port
DSP Read Data port
DSP Write-buffer status port
DSP Write Command/Data port
DSP Read-buffer status port
June 28, 1999
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