Table of Contents Previous topic Next topic
MICROPROCESSOR INSTRUCTION REFERENCE->ST (8 bit)
ST Store Accumulator in Memory
STA
STB
M <- A or M <- B
Condition Code Register:
H Not affected
N Set if result Negative, else cleared
Z Set if result Zero, else cleared
V Always cleared
C Not affected
Addressing mode | No of cycles | No of bytes |
Direct: | 4 | 2 |
Extended: | 5 | 3 |
Index/Indirect: | 4+ | 2+ |