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Appendix B. Block Diagram
PCI BUS

ADDRESS, CONTROL AND DATA BUS

PCI INTERFACE
32-BIT MULTI-MODE
UP/DOWN COUNTER
32-BIT MULTI-MODE
UP/DOWN COUNTER

CONTROL UNIT

32-BIT MULTI-MODE
UP/DOWN COUNTER
32-BIT
UP/DOWN
COUNTER
COUNTER
MODE
CONTROL
DIGITAL
FILTER
PROGRAMMABLE
TIME-BASE
GENERATOR

DIFF/SE ISOL A TION INPUT C IRCUIT

DO/I CH.0
DO/I CH.1
DO/I CH.2
DO/I CH.3
INTERRUPT CONTROLLER
CH.0 INDE X
CH.0 PHASE A
CH.0 PHASE B
CH.1 INDE X
CH.1 PHASE A
CH.1 PHASE B
CH.2 INDE X
CH.2 PHASE A
CH.2 PHASE B
CH.3 INDE X
CH.3 PHASE A
CH.3 PHASE B