IMS 5000 Series Manual page 52

Parallel Port C Bit Direction Selection (Location IB)
The direction of each bit in port C can be individually sdected.
JB
PC7 1
0 0
32
2
0 0
31
PC6 3
0 0
30
4
0 0
29 Bit unused -- no shunts.
PC5 5
0 0
28
6
0 0
27 Input -- pair of horizontal shunts
PC4 7
0 0
26
8
0 0
25
PC3 9
0 0
24
Output -- palr of vertical shunts
10
0
0
23
PC2
11
0 0
22
12
0 0
21
PC1 13
0
0
20
14
0 0
19
PCO
15
0 0
18
16
0 0
17
Port C
prj
verlRecei ver Selection (Location l1C)
74LS240
=
Inverting
74LS244
=
Non Inverting
Port C Termination Options (Location
9M
PCx
PCx
0--0
0--0
Open
lK Pull Up
220/330 Pull Up/Pull Down
=
No Termination
=
Beckman 899-1-R1.0K
=
Beckman 899-5-R220/330
Parallel Port A Mode Selection (Location IC)
Shunt location JC indicates the direction of paralld port
A.
Je
1
0 0
6
2
0 0
5
3
0 0
4
NO SHUNTS
SHUNT JC 1-6
SHUNT JC 2-5
SHUNT JC 3-4
=
Output mode
=
Bidirectional mode controlled by PC7
=
Bidirectional mode controlled by PC6
= Input mode
Port A
Pri
ver lRecei ver Selection (Location 9 B)
8303
=
Inverting
8304
=
Non-Inverting
IMS International
5000 Series MicrocomputeIS/7.0 1.83/page 50