Yamaha OPL3-SA3 PnP ISA Configuration Register, YMF715E, Card Control Registers, May

YMF715E

2-2. PnP ISA Configuration Register

OPL3-SA3 has the following Registers defined in the PnP ISA software.

0x00

0x22

0x30

0x75

Card Control

LDN=0, SA3 Sound System

LDN=1, Joy Stick

LDN=2, MODEM

LDN=3, CDROM

Listed below is the register map of card control register and logical device registers. For the detailed description of each register, please refer to the Plug and Play ISA Specification 1.0a

Card Control Registers

Index	R/W	D7	D6	D5		D4		D3	D2	D1	D0
00h	W					Set RD_DATA
01h	R					Serial Isolation
02h	W					Config Control
03h	W					Wake [CSN]
04h	R					Resource Data
05h	R						Status
06h	R/W				Card Select Number
07h	R/W				Logical Device Number
20h	W				Resource Data Write
21h	W									IKD	RDWE

RDWE : Resource Data Write Enable

Setting “1” to this bit means the host can download the resources data to EEPROM and internal SRAM via 20h.

IKD : Initiation Key Disable

Setting “1” to this bit means OPL3-SA3 should not detect the initiation key in the Wait for Key state.

May 21, 1997

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