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•
Input
stage
gates data gate value with blink, bold,
and
blank
attribute
inputs
to
provide
biasing
to
composite video output and video output stages.
•
Composite
video
output
stage
develops a composite
video
output
to
be
used by an optional monitor device
connected
to
J3
from input stage biasing and composite
sync (C SYNC L) inputs.
•
Video
output
stage
develops video output to monitor
circuits from input stage biasing inputs.
•
Sync buffers -- buffer sync outputs to monitor circuits.
•
Jl -- provides interconnection between logic board and PS
and monitor board.
NOTE
A complete pin-out for Jl is provided in
the
system
communication
logic
description
presented
in
Chapter
5
(Figure 5-9).
Descriptions
of
the signals shown in Figure 6-27 follow in Table
6-2.
6.3
SIGNAL DESCRIPTIONS
Table
6-2
provides
descriptions
of all the signal identifed in
this
chapter.
These descriptions are provided for reference, and
are
listed
alphabetically
by
mnemonic,
with numeric mnemonics
listed last.
6-31
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