Add memory to Accumulator With Carry
Memonic	Mode	Opcode	Cycles	Bytes
ADCA	Immediate	89	2	2
	Direct	99	3	2
	Indexed	A9	5	2
	Extended	B9	4	3
ADCB	Immediate	C9	2	2
	Direct	D9	3	2
	Indexed	E9	5	2
	Extended	F9	4	3

A := A + M + C
B := B + M + C

Results:
H set on carry from bit 3
N set if bit 7 is 1
Z set if all bits are 0
V set on 2's complement overflow
C set on carry from bit 7