Yamaha OPL3-SA3 specifications YMF715E, OPL3 Status Register RO, OPL3 Data Register Array 0 R/W

YMF715E

9.Register description 9-1. SA Sound System 9-1-1. OPL3

Listed below are the OPL3-L register for AdLib compatibility.

AdLib base	(R)	Status Register port
AdLib base	(W)	Address port for Register Array 0
AdLib base + 1	(R/W)	Data port
AdLib base + 2	(W)	Address port for Register Array 1
AdLib base + 3	(R/W)	Data port

Wavetable upgrade (OPL4-ML/ML2) is available by setting /EXTEN (SEL=3, 4, 7) to “L”. And, additional I/O ports listed below can also be accessed. In case of SB mode, AdLib base + 2, 3 is write

only registers.
	AdLib base + 4				(R)	Status port for Wavetable Register
	AdLib base + 4				(W)	Address port for Wavetable Register
	AdLib base + 5				(R/W)	Data port Wavetable Register
	AdLib base + 6				(R/W)	Command port for MIDI processor
	AdLib base + 7				(R)	Status port for MIDI processor
	AdLib base + 7				(W)	Control port for MIDI processor
OPL3 Status Register (RO):
	Index		D7		D6	D5	D4	D3	D2	D1	D0
	xxh		IRQ		FT1	FT2	-	-	BUSY	-	BUSY
OPL3 Data Register Array 0 (R/W):
	Index		D7		D6	D5	D4	D3	D2	D1	D0
	00	- 01h					LSI TEST
	02h						TIMER 1
	03h						TIMER 2
	04h		RST		MT1	MT2	-	-	-	ST2	ST1
	08h		-		NTS	-	-	-	-	-	-
	20	- 35h	AM		VIB	EGT	KSR		MULT
	40	- 55h		KSL				TL
	60	- 75h			AR				DR
	80	- 95h			SL				RR
	A0	- A8h					F-NUM (L)
	B0	- B8h	-		-	KON		BLOCK		F-NUM (H)
	BDh		DAM		DVB	RHY	BD	SD	TOM	TC	HH
	C0	- C8h	*		*	CHR	CHL		FB		CNT
	E0	- F5h	-		-	-	-	-		WS

May 21, 1997

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