HP-41 Byte Table

[Sylvain Cote]

Small details ...

• there are 15 (2 bytes) GTO's (00 to 14) and matching labels (00 to 14) not 16
• if LBL is out of reach (>112 bytes), the second byte will stay at 0x00 and label scan will be done each time
• LBL search is always going forward until the end of the program, then go to start of the program and forward search again
• you can have multiple LBL XX (00 to 14) and GTO XX (00 to 14) in your program (see example below)
  

Multiple labels example

Code:

program        uncompiled               compiled                 notes
01 LBL "ABC"   C0 00 F4 00 41 42 43     C0 00 F4 00 41 42 43     
02 LBL 00      01                       01                       
03 X<>Y        71                       71                       
04 GTO 00      B1 00                    B1 10                    goto line 06, forward 1 byte (0 register & 1 byte)
05 1/X         60                       60                       
06 LBL 00      01                       01                       
07 SIN         59                       59                       
08 GTO 00      B1 00                    B1 A1                    goto line 02, backward 9 bytes (1 register & 2 bytes)
09 END         C4 02 09                 C4 02 09