Fujitsu CM71-00101-5E User Manual
177
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.81
STB (Store Byte Data in Register to Memory)
Stores the byte data in "Ri" to memory address "(R14 + o8)".
The value "o8" is a signed calculation.
The value "o8" is a signed calculation.
■
STB (Store Byte Data in Register to Memory)
Assembler format:
STB Ri, @ (R14, disp8)
Operation:
Ri
→
(R14 + o8)
Flag change:
N, Z, V, and C: Unchanged
Execution cycles:
a cycle(s)
Instruction format:
Example:
STB R3, @(R14, 1)
N
Z
V
C
–
–
–
–
MSB
LSB
0
1
1
1
Ri
o8
12345678
R3
R3
0 0 0 0
0 0 2 1
2 1
12345678
12345679
12345679
1 2 3 4
5 6 7 8
0 0 0 0
0 0 2 1
R14
1 2 3 4
5 6 7 8
R14
Instruction bit pattern :
0111 0000 0001 0011
x x
Memory
Memory
Before execution
After execution