Yamaha OPL3-SA3 specifications ISA Interface, PnP Auto-Configurationmode, YMF715E

YMF715E

2. ISA Interface

OPL3-SA3 supports ISA Plug and Play (PnP) that frees the users from configuring the I/O address, IRQ and DMA channel. Those system resources are set automatically by the system. However even when used in Non PnP system, the configuration can be changed with software.

2-1. PnP Auto-Configuration mode

OPL3-SA3 has the following I/O port to support the Plug and Play ISA.

Address port:	279h
Write Data Port:	A79h
Relocatable Read Data Port:	203h - 03FFh

The following four Logical Devices are supported by OPL3-SA3.

Logical Device No. 0
Sound Blaster compatible Playback system	(SB Base)
16-bit CODEC	(WSS Base)
MPU401	(MPU Base)
OPL3	(AdLib Base)
OPL3-SA3 control register	(CTRL Base)
Logical Device No. 1
Joy Stick
Logical Device No. 2 (Optional)
MODEM (COM port)
Logical Device No. 3 (Optional)
IDE CD-ROM interface

May 21, 1997

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