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TRB

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Basic Info
Addressing Mode Opcode Length Speed
Absolute 1C 3 bytes 6 cycles*
Direct Page 14 2 bytes 5 cycles*
Flags Affected
N V M X D I Z C
. . . . . . Z .

TRB (Test and Reset Bits) is a 65c816 instruction that tests and resets bits using the accumulator. For each set bit in the accumulator, the corresponding memory bit is cleared.

TRB performs a logical AND (conjunction) and the zero flag is set or cleared to reflect whether the conjunction is zero.

Syntax

TRB addr
TRB dp
Cycle Penalties

See Also

External Links