YMF715E Datasheet, PDF (25/54 Pages) YAMAHA CORPORATION – OPL3 Single-chip Audio System 3

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ɹɹ9. Register description
ɹ9-1. SA Sound System
ɹ9-1-1. 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
xxh
IRQ
FT1
FT2
-
D3
D2
D1
D0
-
BUSY
-
BUSY
OPL3 Data Register Array 0 (R/W):
Index
D7
D6
D5
00 - 01h
02h
03h
04h
RST
MT1
MT2
08h
-
NTS
-
20 - 35h AM
VIB
EGT
40 - 55h
KSL
60 - 75h
AR
80 - 95h
SL
A0 - A8h
B0 - B8h
-
-
KON
BDh
DAM
DVB
RHY
C0 - C8h *
*
CHR
E0 - F5h
-
-
-
D4
D3
D2
D1
D0
LSI TEST
TIMER 1
TIMER 2
-
-
-
ST2
ST1
-
-
-
-
-
KSR
MULT
TL
DR
RR
F-NUM (L)
BLOCK
F-NUM (H)
BD
SD
TOM
TC
HH
CHL
FB
CNT
-
-
WS
May 21, 1997
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