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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
Example: RETI
8088 8088
FFF3 F8F1
8088 8088
FFF3 F8F1
R15
xxxx xxxx
7FFFFFF8
7FFFFFFC
80000000
7FFFFFF8
7FFFFFFC
80000000
8000 0000
4000 0000
SSP
4000 0000
USP
PC
FFF3 F8F1
8088 8088
PS
10011
ILM
10000
ILM
110001
SINZVC
CCR
R15
7FFF FFF8
7FFF FFF8
SSP
4000 0000
USP
PC
FFF0 F8D4
FF00 90BC
PS
010100
SINZVC
CCR
Memory Memory
Before execution After execution
xxxx xxxx
Instruction bit pattern : 1001 0111 0011 0000