We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

TRB

From SnesLab
Revision as of 02:00, 26 July 2024 by Xetheria (talk | contribs) (→‎See Also: BIT)
Jump to: navigation, search
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