The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson

Arithmetic Operations

the instruction set of 8051

appendix f

Mnemonic Description Bytes Cycles

ADD A,Rn Add register to A 1 1

ADD A,direct Add direct byte to A 2 1

ADD A,@Ri Add indirect RAM to A 1 1

ADD A,#data Add immediate data to A 2 1

ADDC A,Rn Add register to A with Carry 1 1

ADDC A,direct Add direct byte to A with Carry 2 1

ADDC A,@Ri Add indirect RAM to A with Carry 1 1

ADDC A,#data Add immediate data to A with Carry 2 1

SUBB A,Rn Subtract register from A with Borrow 1 1

SUBB A,direct Subtract direct byte from A with Borrow 2 1

SUBB A,@Ri Subtract indirect RAM from A with

Borrow

1 1

SUBB A,#data Subtract immediate data from A with

Borrow

2 1

INC A Increment ...