Byte I/O Module - RCA COSMAC Operator's Manual

BYTE I/O MODULE
This card has independent output and input ports for
latching of a byte of data for external use, or gating
an input byte to RAM. Both ports are available for
user devices.
I/O STROB
OUTPUT
DEVICE
SELECT
DATA OUT
(8)
GATE
8 BYTE
BIT OUT (8)
LATCH
USER
DEVICE
A TA
TRANS- B
TE
~_D_,
,-:--I_N_.....
N
ISS ION
..--Y_~
(8)
GATE
(&)
IN
(8)
I/O SYNC
INPUT
DEVICE
SELECT
USER
DEVICE
Fig.13: Block Diagram - Byte I/O Module
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