This page describes the following instruction:
- Group: PAIR
- Mnemonic: pt
- Opcode: 253d, FDh
- Encoding: 1_111_1101b (PAIR_SRC_DST)
- Pseudo-code: if r!=0 then pc=pir else pc++
- P:PARALLEL T:TRUE
- Source is the Parallel Input register (PIR).
- If R is NOT zero, set the Program Counter to source.
The 'P' source is a data byte received on the parallel bus. See Device Communication for how this works. The 'T' destination takes the source value as the target offset of a conditional jump (R!=0) to within the current code page. See In-Page Branching for more on this.