DR805x Instructions set details
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2.2. INSTRUCTION SET BRIEF – FUNCTIONAL ORDER
2.2.1. ARITHMETIC OPERATIONS
Mnemonic
ADD A,Rn
Description
Add register to accumulator
Code
0x28-0x2F
0x25
0x26-0x27
0x24
0x38-0x3F
0x35
0x36-0x37
0x34
0x98-0x9F
0x95
0x96-0x97
0x94
0x04
0x08-0x0F
0x05
Bytes Cycles
1
2
1
2
1
2
1
2
1
2
1
2
1
1
2
1
1
1
1
2
1
1
1
1
2
3
3
2
2
3
3
2
2
3
3
2
2
3
4
4
2
3
4
4
1
4
5
4
ADD A,direct
ADD A,@Ri
ADD A,#data
ADDC A,Rn
ADDC A,direct
ADDC A,@Ri
ADDC A,#data
SUBB A,Rn
SUBB A,direct
SUBB A,@Ri
SUBB A,#data
INC A
INC Rn
INC direct
INC @Ri
DEC A
DEC Rn
Add direct byte to accumulator
Add indirect RAM to accumulator
Add immediate data to accumulator
Add register to accumulator with carry flag
Add direct byte to A with carry flag
Add indirect RAM to A with carry flag
Add immediate data to A with carry flag
Subtract register from A with borrow
Subtract direct byte from A with borrow
Subtract indirect RAM from A with borrow
Subtract immediate data from A with borrow
Increment accumulator
Increment register
Increment direct byte
Increment indirect RAM
Decrement accumulator
Decrement register
Decrement direct byte
Decrement indirect RAM
Increment data pointer
0x06-0x07
0x14
0x18-0x1F
0x15
0x16-0x17
0xA3
DEC direct
DEC @Ri
INC DPTR
MUL A,B
DIV A,B
DA A
Multiply A and B
Divide A by B
Decimal adjust accumulator
0xA4
0x84
0xD4
Table 3. Arithmetic operations
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