Detailed Configuration - Zenith Data Systems Z-100 Series Installation Manual

Page
2.6
Installation, Configuration, and Initial 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 8K x 8 ROM IC installed. It is possible to
install 4K 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
pas
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
pas
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
pas
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.