Yamaha OPL3-SA3 specifications YMF715E, Sbpda

YMF715E

Sound Blaster compatibility Internal State Scan out/in (R/W):

Index	D7	D6	D5	D4	D3	D2	D1	D0
10h	SBPDA	-	-	-	SS	SM	SE	SBPDR
SBPDA...	Sound Blaster Power Down Acknowledgment: “1” in SBPDA acknowledges
	that OPL3-SA3 is ready for scanning internal state data in/out or for power
	down operation. This flag is read-only.
SS...	Scan Select : Set “1” in this bit when reading or writing internal state.
	Set “0” for normal operation.
SM...	Scan Mode : Setting “1” in this bit means the internal state’s are read(out).
	Set “0” for write(in).
SE...	Scan Enable : “1” to “0” transition in this bit clocks the shifting internal state
	scan data out 1-bit at a time.
SBPDR...	Sound Blaster Power Down Request : “1” in this bit inhibits further DMA
	requests and have the internal state begin shutdown procedure. “1” in
	SBPDA signals the shutdown procedure completion.

default : 00h

Sound Blaster compatibility Internal State Scan Data (R/W):

Index	D7	D6	D5	D4	D3	D2	D1	D0
11h				SCAN DATA

SCAN DATA... Data port for internal state scan data in/out. default : 00h

Notice)

The Sound Blaster compatibility internal state scan out/in sequence are shown in the following Fig.9-1.

May 21, 1997

-38-