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vertical SYNC Polarity <IC)
The shunt on JC selects the polarity of the vertical SYNC signal to the monitor.
If pins 1 and 2 are shunted, VSYNC has minus polarity; if 2 and 3 are shunted,
V SYNC has plus polari ty.
JC
1
0
2
0
3
0
Horizontal SYNC Polarit
y
(J B)
The shunt on JB selects the polarity of the horizontal SYNC signal.
Pins 1 and
2 shunted indicates minus polarity; if 2 and 3 are shunted, HSYNC has plus
polari ty.
JB
1
0
2
0
3
0
Character Generator Selection 00>
This location indicates the type of EPROM used for character generation.
Normally, the shunts ate set up for a 2716 EPROM (2 Kbytes).
JD
1
0
2716 EPROM --
1-2 shunted
2
0
4-5 shunted
3
0
4
0
2732 EPROM --
1-2 shunted
5
0
3-4 shuflted
SW-1 to SW-4)
The first four switches on the switch package SW1 select the baud rate used when
the system is first powered up.
The baud rate is selected in the following
manner:
J
SWITCH #
~
1-
z...
L
~
19,200
ON
ON
ON
ON
9,600
OFF
ON
ON
ON
4,800
ON
OFF
ON
ON
2,400
OFF
OFF
ON
ON
1,800
ON
ON
OFF
ON
1,200
OFF
ON
OFF
ON
600
ON
OFF
OFF
ON
300
OFF
OFF
OFF
ON
150
ON
ON
ON
OFF
110
OFF
ON
ON
OFF
\
J
IMS Inten:ational
5000 Series Microcomputers/7.0 1.83/page 84
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