Connect HP41 to Apple

[Sylvain Cote]

Hello Henk,

(01-20-2024 12:29 PM)hesc Wrote:  What is the original file format resulting from the HP41 to HPIL transfer and what kind of headers are connected to the raw and bin format?

HP-41 compiled program file formats

Code:

.RAW →                    [compiled code] + [1-byte checksum] + [trailer]
.BIN → [ 2-byte header] + [compiled code] + [1-byte checksum] + [trailer]
.DAT → [ 4-byte header] + [compiled code] + [2-byte checksum]

HP-IL formats

Code:

.LIF → LIF file   - a file with a 32-byte lif header
.DAT → LIF volume - a virtual cassette or floppy disk

Code:

.LIF → [32-byte header] + [file data]
.P41 → same a .LIF
.PAK → same a .LIF
.DAT → [256-byte system record] + [n * 256-byte unused/reserved records] + [n * 256-byte directory records] + [n * 256-byte file data records]

More information can be found here:

• HandHeld Products - 41 User Code Compiler Reference Manual
• Leo Duran - HP41UC (User's Guide & source code)
• Craig A. Finseth - LIF: The Logical Interchange Format
• Joachim Siebold - LIF Utilities (Readme)
• Ansgar Kückes - The HPDir Project
• Dan McDonald - HP-IL Files: Where, What, Why, How, etc.
• Sylvain Côté - Diego Díaz - Clonix & NoV modules HHC/HPCC 2020 Presentations (contains the description of several file formats)
  

(01-20-2024 12:29 PM)hesc Wrote:  Do you have an idea why the transfer is not very stable?
Do you think there is a mismatch in serial? Settings or so?

I have never used HP41UC so I cannot help you here.