YMF724F Datasheet, PDF (24/50 Pages) YAMAHA CORPORATION – high performance audio controller for the PCI Bus

YMF724F
4C-4Dh: D-DMA Slave Configuration
Read / Write
Default: 0000h
Access Bus Width: 8, 16, 32-bit
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Base Address
EA
TS
CE
b0................CE: Channel Enable
This bit enables the Distributed DMA function.
“0”: Disable Distributed DMA (default)
“1”: Enable Distributed DMA
b[2:1] ..........TS: Transfer Size
These bits indicate the size of the DMA transfer. Since DS-1 supports only 8-bit DMA transfer, the bits
are hardwired to 00b.
b3................EA: Extended Address
DS-1 does not support extended address mode. This bit is hardwired to 0b.
b[15:4] ........Base Address : D-DMA Slave Base Address
These bits indicate the D-DMA slave base address.
50h: Capability ID
Read Only
Default: 01h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Capability ID
b[7:0] ..........Capability ID: Capability Identifier
This register indicates that the new capability register is for Power Management control. This register is
hardwired to 01h.
January 14, 1999
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