Instruction List
B-3
ET 200S Interface Module IM 151/CPU
A5E00058783-01
B.2 Abbreviations
The following abbreviations and mnemonics are used in the Instruction List:
Abbre-
viation
Stands for Example
k8 8-bit constant 32
k16 16-bit constant 62 531
k32 32-bit constant 127 624
i8 8-bit integer –155
i16 16-bit integer +6523
i32 32-bit integer –2 222 222
m P#x.y (pointer) P#240.3
n Binary constant 1001 1100
p Hexadecimal constant EA12
LABEL Symbolic jump address (max. 4 cha-
racters)
DEST
B.3 Tab
ACCU1 and ACCU2 (32 Bits)
The accumulators are registers for processing bytes, words or double words. The
address IDs are loaded into the accumulators, where they are logically gated. The
result of the logic operation (RLO) is always in ACCU1.
The accumulators are 32 bits long.
Accumulator designations:
ACCU Bit
ACCU1 ACCU2 Bits 0 to 31
ACCU1-L ACCU2-L Bits 0 to 15
ACCU1-H ACCU2-H Bits 16 to 31
ACCU1-LL ACCU2-LL Bits 0 to 7
ACCU1-LH ACCU2-LH Bits 8 to 15
ACCU1-HL ACCU2-HL Bits 16 to 23
ACCU1-HH ACCU2-HH Bits 24 to 31
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