AM79C961A Datasheet, PDF (49/85 Pages) Advanced Micro Devices – PCnet ™-ISA II Jumperless, Full Duplex Single-Chip Ethernet Controller for ISA

PRELIMINARY
Plug and Play Register Map
The following chart and its bit descriptions show the
internal configuration registers associated with the
Plug and Play operation. These registers control the
configuration of the PCnet-ISA II controller.
Plug and
Play Register
0x00
0x01
0x02
Bit 7
0
0x03
0x04
0x05
0
0x06
0x07
0x30
0
0x31
0
Bit 6
0
0
0
0
Bit 5
0
0
Bit 4
Bit 3
READ_DATA
SERIAL ISOLATION
0
0
WAKE [CSN]
RESOURCE_DATA
0
0
Bit 2
RST
CSN
0
CSN
LOGICAL DEVICE NUMBER
0
0
0
0
0
0
0
0
Bit 1
Bit 0
WAIT
KEY
RST
ALL
0
READ
STATUS
0
IORNG
ACTIVATE
IORNG
READ_DATA
SERIAL_ISOLATION
RST_CSN
WAIT_KEY
RST_ALL
WAKE [CSN]
READ_STATUS
RESOURCE_DATA
CSN
ACTIVATE
IORNG
Address of Plug and Play READ_DATA Port.
Used in the Serial Isolation process.
Resets CSN register to zero.
Resets Wait for Key State.
Resets all logical devices.
Will wake up if write data matches CSN Register.
Read Status of RESOURCE DATA.
Next pending byte read from EEPROM.
Plug and Play CSN Value.
Indicates that the PCnet-ISA II device should be activated.
Bits used to enable the I/O Range Check Command.
Am79C961A
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