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INS
(SP) + $0001 ⇒ SP
Operation:
Description:
Add one to the SP. This instruction is assembled to LEAS 1,SP. The
LEAS instruction does not affect condition codes as an INX or INY in-
struction would.
Condition Codes and Boolean Formulas:
S
–
None affected.
Addressing Modes, Machine Code, and Execution Times:
Source Form
INS translates to...
LEAS 1,SP
Notes:
1. Due to internal CPU requirements, the program word fetch is performed twice to the same address during this
instruction.
CPU12
REFERENCE MANUAL
Increment Stack Pointer
X
H
I
N
Z
–
–
–
–
–
Address Mode
IDX
1B 81
INSTRUCTION GLOSSARY
V
C
–
–
Object Code
INS
Cycles
Access Detail
2
1
PP
MOTOROLA
6-99
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