HP-41 Byte Table

[JurgenRo]

(12-28-2018 04:43 PM)Sylvain Cote Wrote:  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

Thank you very much, Sylvain! This is important, valuable information really! Appreciate it indeed! Still so much to find out after so many years!