HP41 and ProtoCODER on the road again...

[pilou45000]

I have a beginner's question:

To load a word in the ProtoCoder:
1: Put it (HEX) in ALPHA: DD DX XX XX AA AX SS. DDD : data + C00 ; AAA: address where data to be written (000-FFF) ; SS: device select of the ProtoCoder.
2: execute “CODE” for convert in NNN to X
3: execute “SIGN” with the ProtoCODER1 and “ABS” with the ProtoCODER2

What is the difference between “SIGN” and “ABS” ?