Page
2.16
Installation,
Configuration,
and
Initia.l
Tests
Detailed Configuration
• Jumpers J6 and J7 are used
to
"size" the
RAM
chips
on
the Z-329
Card. The card is shipped with 2K x 8 static
RAM
ICs installed.
It
is
possible to install 8K x 8 static RAM ICs. When this is done, these
jumpers must be moved
to
the 8K position.
• Jumper J5 is used
to
"size" the
ROM
chips on the Z-329 Card. The
card is shipped with a 4K x 8 ROM
IC
installed.
It
is possible
to
install 8K x 8 or 16K x 8 ROM
ICs.
When this
is
done, J5 must
be
moved to the position corresponding
to
the size of the
ROM
in-
stalled.
• Jumper J3 controls the polarity of the video data. When this jumper
is
in
the POS position, + 5 VDC
is
used
to
light a pixel and ground
drives dark pixels. When this jumper
is
in
the
NEG
position, ground
is supplied
to
the monitor for all lighted pixels and + 5 VDC
is
used
for dark pixels.
• Jumper J2 controls the polarity of the intensity signal.
In
the POS
position, an intensified character is signified by a logic high and a
standard display by a ground.
In
the
NEG
position, logic high
is
used
for the standard display and intensified characters are created by a
ground.
• Jumper J4 controls the polarity of the horizontal sync.
In
the POS
position the sync pulses are positive-going.
In
the
NEG
position the
pulses are negative-going.
• Jumper
J1
controls the polarity of the vertical sync.
In
the pas position
the sync pulses are positive-going.
In
the NEG position the pulses
are negative-going.
System Board Switch Settings
Sections 5 and 6 of switch 1 on the system board control which video
format is used.
In
order for the Z-329 Card to operate, these switch sec-
tions must be
in
the proper position.
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