This page describes the following instruction:
- Group: PAIR
- Mnemonic: pr
- Opcode: 244d, F4h
- Encoding: 1_111_0100b (PAIR_SRC_DST)
- Pseudo-code: r=pir; pc++
- P:PARALLEL R:RESULT
- Source is the Parallel Input register (PIR).
- Destination is the R register.
The 'P' source is a data byte received on the parallel bus. See Device Communication for how this works.