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Timer Clock Option (Location IH)
JH
1
0
0
4
Shunt JH 1-4
=
Enable External 2Mhz Clock (75 to 9600 baud rate)
2
0
0
3
Shunt JH 2-3
=
Enable on-board 1.2288 Mhz Clock (75 to 19200
baud rate)
Interrupt Options (Locations II, IK. IL. 1M. IN)
The installation of a horizontal shunt will select the interrupt level for the functions
listed below.
JJ
- IN
VI7
1
0
0
16
JJ=
Relative Time Clock (RTC) Interrupt
VI6
2
0
0
15
JK =
Line 0 Transmit/Receive Interrupt
VI'
3
0
0
14
JL =
Line 1 Transmit/Receive Interrupt
VI4
4
0
0
13
JM =
Parallel Port B Interrupt
VB
5
0
0
12
IN =
Parallel Port A Interrupt
VI2
6
0
0
11
VIl
7
0
0
10
VIO
8
0
0
9
1;0 Device Address Selection (Location IP)
JP
A7
1
00----00
8
A6
2
0
0
7
AS
3
0
0
6
A4
4
0
0
5
Example:
Shunt OFF
=
1
Shunt ON
=
0
All Shunts OFF
=
I/O Addresses FOH
FFH
All Shunts ON
=
I/O Addresses OOH - OFH
Shunt A7, A6, A5 =
I/O Address of 10 hex (Standard)
Shunt A7, A6, A4
=
I/O Address of 20 hex
Shunt A7. A5. A4
=
I/O Address of 40 hex
IMS International
5000 Series Microcomputers/7.01.83jPage 47
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