IMS IMSAI 8080 User Manual page 438

TABLE 2 - Internal Address Selection
Jumpers Inserted
Port
(Pin Number) Numbers
(8,9)
1
6
(3, 14)
1 (8, 9)
8
(1, 16)
3
(6, 11)
6 (3, 14)
3
(6, 11)
8
(1, 16)
2
(7, 10)
5
(4, 13)
4 (5, 12)
5
(4, 13)
2
(7, 10)
7
(2, 15)
4 (5, 12)
7
(2, 15)
Port
Referenced
CRI
0
PIO
1
SIO
2
3 CONT
0 PIO
CRI
1
2 CONT
3 SIO
SIO
0
1 CONT
2 CRI
PIO
3
CONT
0
1 SIO
PIO -
2
3 CRI
0 CRI
1 SIO
2 PIO
3 CONT
0 PIO
1 CONT
2
CRI
3 - SIO
0 SIO
1 CRI
2 CONT
PIO
3
0 CONT
PIO
1
2
SIO
3 CRI
MIO
User Guide
Comments
IMSAI SIO
Processor Tech
3P+S
Altair SIO
Use Parallel port
to be compatible
with IMSAI SIO
Software
Use Parallel port
to be compatible
with Altair SIO
Software