SMC Networks SMC91C95 Product Manual page 39

BANK SELECT REGISTER
OFFSET
E BANK SELECT
HIGH
0
BYTE
0
LOW
BYTE
X
BS2, BS1, BS0 - Determine the bank presently in
use.
The BANK SELECT REGISTER is always
accessible except in PCMCIA powerdown mode
and is used to select the register bank in use.
The upper byte always reads as 33h and can be
used to help determine the I/O location of the
SMC91C95.
NAME
REGISTER
0 1 1
0 1 1
X X X
BS2 BS1
0 0
0 0
0 1
0 1
1 X
39
TYPE
READ/WRITE
0 0
0 0
BS2
X 0
The BANK SELECT REGISTER is always
accessible regardless of the value of BS0-BS2.
The SMC91C95 implements only four banks in
ISA mode, therefore, accesses to non-existing
banks (BS2=1) are ignored.
accessible in PCMCIA mode.
BS0 BANK#
0 0
1 1
0 2
1 3
X None
SYMBOL
BSR
1 1
1 1
BS1 BS0
0 0
All six banks are