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BLOCK DIAGRAM
Bus Interface Unit
IREQ
A14–0 or
LA23–17, SA16–0
D7–0
PCMCIA
ISA Control Signals
CLKIN
4
P R E L I M I N A R Y
System
Interrupt
Generator
Address Buffer
Data Buffer
SIR0
SIR1
...
SIR7
Slave
Control
PCMCIA
or
and ISA
Memory
and I/O
PCMCIA
Config Registers
Plug and Play
Control Module
ISA Memory Base
ISA I/O Base
Am79C930
MD[7:0]
MA[16:0]
Latch
Bus
Multi-
plexer
MIR0
MIR1
...
MIR15
Slave
Control
and
Arbitration
for
Memory
Interface
Bus
80188
Interrupt
Generator
CA16
ALE
CA15–8
CAD7–0
MOE
MWE
UCS
LCS
SRDY
XCE
FCE
TAICE
SCE
INT1
RESET
20183B-2
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