This page describes the following instruction:
- Group: PAIR
- Mnemonic: sf
- Opcode: 238d, EEh
- Encoding: 1_110_1110b (PAIR_SRC_DST)
- Pseudo-code: if r==0 then pc=sir else pc++
- S:SERIAL F:FALSE
- Source is the Serial Input register (SIR).
- If R IS zero, set the Program Counter to source.
The 'S' source is a deserialised byte received over the serial bus. See Device Communication for how this works. The 'F' 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.