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YMF715E
May 21, 1997
-25-
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