TRB TRB Test and Reset Bit TRB N V M X D I Z C Operation: /A /\ W -> W . . . . . . / . 4510 Versions: +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Direct Page | TRB $FF | $14 | 2 | 5r | | Absolute | TRB $FFFF | $1C | 3 | 4r | +----------------+-----------------------+---------+---------+----------+ r Add 1 if clock speed is at 40 MHz 65816 Versions: +----------------+-----------------------+---------+---------+----------+ | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles| +----------------+-----------------------+---------+---------+----------+ | Absolute | TRB $FFFF | $1C | 3 | 4 | | Direct Page | TRB $FF | $14 | 2 | 3 | +----------------+-----------------------+---------+---------+----------+ For penalty cycles on the 65816, check the desired addressing mode.