Instruction List
B-45
ET 200S Interface Module IM 151/CPU
A5E00058783-01
B.33 ACCU Transfer Instructions, Incrementing, Decrementing
Status Word
The status word is not affected.
In-
struc-
tion
Address
ID
Description
Length
in
Words
Typical Execution Time in
s
CAW Reverse the order of the bytes in
ACCU1–L
LL, LH becomes LH, LL.
1 0.3
CAD Reverse the order of the bytes in ACCU1
LL, LH, HL, HH becomes HH, HL, LH, LL.
1 0.6
TAK Swap the contents of ACCU1 and ACCU2 1 0.8
PUSH The contents of ACCU1 are transferred to
ACCU2
1 0.3
POP The contents of ACCU2 are transferred to
ACCU1
1 0.3
INC 0 to 255 Increment ACCU1-LL 1 0.3
DEC 0 to 255 Decrement ACCU1-LL 1 0.3
B.34 Program Display and Null Operation Instructions
Status Word
The status word is not affected.
In-
struc-
tion
Ad-
dress
ID
Description
Length
in
Words
Typical Execution Time in
s
BLD 0 to 255 Program display instruction;
Is treated by the CPU like a null operation
instruction.
The indicators are not affected.
1 0.3
NOP 0
1
Null operation instruction:
The indicators are not affected.
1 0.3
0.3
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