ABA        Add Accumulator B to Accumulator A
Category:  Arithmetic operation (Two operands).
Function:  ACCA <-- (ACCA) + (ACCB)

Effects on the Condition Codes
H = A3&B3|B3&~R3|~R3&A3
I = N/A
N = R7
Z = ~R7&~R6&~R5&~R4&~R3&~R2&~R1&~R0
V = A7&B7&~R7|~A7&~B7&R7
C = A7&B7|B7&~R7|~R7&A7

ADDR    MNEM    OPER        1st     2nd     3rd
MODE    NOIC    FRMT        BYTE    BYTE    BYTE
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IMPL    ABA                 1B