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YMF715E
May 21, 1997
-15-
2-2. PnP ISA Configuration Register
OPL3-SA3 has the following Registers defined in the PnP ISA software.
LDN=3, CDROM
LDN=1, Jo
y
Stick
LDN=0, SA3 Sound S
y
stem
Card Control
0x75
0x30
0x22
0x00
LDN=2, MODEM
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.