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5-3
Section
I/O Allocation for CPM2C PCs
326
•
Bits in the output words that are not used as output bits can be used as work
bits.
•
Bits in the input words that are not used as input bits can be used as work bits.
Expansion I/O Unit with 8 Inputs
CPM2C-8EDC
CPM2C-8EDM
Inputs
m+1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Do not use
8 inputs
Word (m+1), bit 00
to
Word (m+1), bit 07
No outputs
Bits
Expansion I/O Unit with 16 Inputs
CPM2C-16EDC
CPM2C-16EDM
Inputs
m+1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
16 inputs
Word (m+1), bit 00
to
Word (m+1), bit 15
No outputs
Bits
Expansion I/O Units with 8 Outputs
CPM2C-8ER
CPM2C-8ETC
CPM2C-8ET1C
CPM2C-8ETM
CPM2C-8ET1M
Outputs
n+1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
No inputs
8 outputs
Word (n+1), bit 00
to
Word (n+1), bit 07
Bits
Expansion I/O Units with 16 Outputs
CPM2C-16ETC
CPM2C-16ET1C
CPM2C-16ETM
CPM2C-16ET1M
Outputs
n+1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
No inputs
16 outputs
Word (n+1), bit 00
to
Word (n+1), bit 15
Bits