Zilog Z80380 Manuel d'utilisateur Page 211

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Z380
USER'S MANUAL
ZILOG
DC-8297-03
TST
TEST (BYTE)
TST src src = R, IM, IR
Operation: A AND src
A logical AND operation is performed between the corresponding bits of the source operand
and the accumulator. The contents of both the accumulator and the source are unaffected;
only the flags are modified as a result of this instruction.
Flags: S: Set if the most significant bit of the result is set; cleared otherwise
Z: Set if all bits of the result are zero; cleared otherwise
H: Set
P: Set if the parity is even; cleared otherwise
N: Cleared
C: Cleared
Addressing Execute
Mode Syntax Instruction Format Time Note
R: TST R 11101101 00-r-100 2
IM: TST n 11101101 01100100 ——n— 2
IR: TST (HL) 11101101 00110100 2+r
Field Encodings: r: per convention
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