20
Rabbit 2000/3000 Microprocessor
Description
Performs a logical AND operation between the byte in the Accumulator and the byte whose address is:
•
in word register HL, or
•
the sum of the data in index register IX and a displacement value d, or
•
the sum of the data in index register IY and a displacement value d.
The relative bits of each byte are compared (i.e., the bit 1 of both bytes are compared, the bit 2 of both bytes
are compared, etc.) and the associated bit in the result byte is set only if both the compared bits are set. The
result is stored in the Accumulator.
Example
If the byte in the Accumulator contains the bits 1011 1100 and the byte at memory location HL contains the
bits 1101 0101, then the execution of the instruction:
AND (HL)
would result in the byte in the Accumulator becoming 1001 0100.
AND (HL)
AND (IX+d)
AND (IY+d)
Opcode
Instruction
Clocks
Operation
A6
AND (HL)
5 (2,1,2)
A = A & (HL)
DD A6 d
AND (IX+d)
9 (2,2,2,1,2)
A = A & (IX+d)
FD A6 d
AND (IY+d)
9 (2,2,2,1,2)
A = A & (IY+d)
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
•
•
L
0
•
•
•
Summary of Contents for 2000
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