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Subtract From Accumulator With Sign Extension Suppressed
SUBS
7-183
Assembly Language Instructions
Cycles for a Repeat (RPT) Execution of an SUBS Instruction
Program
Operand
ROM
DARAM SARAM External
DARAM n n n n+p
SARAM n n n, n+1
†
n+p
External n+nd n+nd n+nd n+1+p+nd
†
If the operand and the code are in the same SARAM block
Example 1 SUBS DAT2 ;(DP = 16, SXM = 1)
Before Instruction After Instruction
Data Memory Data Memory
802h 0F003h 802h 0F003h
ACC X 0F105h ACC 1 102h
CC
Example 2 SUBS * ;(SXM = 1)
Before Instruction After Instruction
ARP 0 ARP 0
AR0 310h AR0 310h
Data Memory Data Memory
310h 0F003h 310h 0F003h
ACC X 0FFFF105h ACC 1 0FFF0102h
CC