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ADD A,r     Add Without Carry     Rabbit 4000/5000 Instruction

Opcode	Instruction	Operation
----	ADD A,r	A = A + r
7F 87	ADD A,A	A = A + A
7F 80	ADD A,B	A = A + B
7F 81	ADD A,C	A = A + C
7F 82	ADD A,D	A = A + D
7F 83	ADD A,E	A = A + E
7F 84	ADD A,H	A = A + H
7F 85	ADD A,L	A = A + L

Clocks	8-Bit Access	16-Bit Unaligned	16-Bit Aligned
Rabbit 4000	4	n/a	n/a
Rabbit 5000	2	2	2

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
·	·	V	·	·	·

Description

A is summed with r (any of the registers A, B, C, D, E, H, or L). The result is stored in A.The Rabbit 4000/5000 assemblers view "ADD A,r" and "ADD r" as equivalent instructions. In the latter case, A is used even though it is not explicitly stated.

The opcodes for these instructions are different than the same instructions in the Rabbit 2000, 3000 and 3000A.