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YMF715E
May 21, 1997
-30-
9-1-3. WSS compatible 16-bit CODEC
The followings are the I/Os for Window Sound System compatibility.
WSS base (R) WSS Configuration Register port
WSS base + 3h (R) WSS Status Register port
WSS base + 4h (R/W) WSS CODEC Index address port
WSS base + 5h (R/W) WSS CODEC Index data port
WSS base + 6h (R/W) WSS CODEC Status port
WSS base + 7h (R/W) WSS CODEC PIO Data port
WSS Configuration Register (RO):
portD7D6D5D4D3D2D1D0
+0h “0” “0” IRQ DMA
This register is used to indicate what resources is assigned and it is read only register.
IRQ:
“0”: No interrupt channel is available
“1”: IRQ7 is available
“2”: IRQ9 is available
“3”: IRQ10 is available
“4”: IRQ11 is available
“5”-”7”: reserved.
DMA:
“0”: No DMA channel is available
“1”: DMA0
“2”: DMA1
“3”: DMA3
“4”-“7”: reserved
Notice)
In the case that CODEC is in Dual DMA mode, only playback DMA channels are valid
and recording DMA channels are ignored.
WSS Status Register (RO):
portD7D6D5D4D3D2D1D0
+03h SBHC “0” “04h”
WSS CODEC Direct Registers (R/W):
portD7D6D5D4D3D2D1D0
+4h INIT MCE TRD Index Address
+5h Index Data
+6h CU/L CL/R CRDY SER PU/L P/R PRDY INT
+7h PIO Data