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HP-41 VASM Commented Listings
05-16-2017, 10:31 PM
Post: #1
HP-41 VASM Commented Listings
Hi All.

I've recently been looking into HP-41 VASM listings, and was just wondering if anyone has versions that I don't have. I have seen three different "formats": Scanned pdf, Text pdf, and Text file.

Here is what I have:
41OS Rev GFF: Scanned pdf, Text pdf, Text file
41OS Rev HFF: Scanned pdf
EXT FCN 1C: Scanned pdf
TIME 1C: Scanned pdf
82143A Printer 1E: Text Pdf (from Dave Wilder)
82162A HP-IL Printer 2E: Scanned pdf, Text pdf, Text file
82161A HP-IL Cassette 1H: Scanned pdf Text pdf, Text file

As an exercise, I have written a little C++ utility (not ready for prime time) that is able to read a text file VASM format, and convert from octal addresses to hex, as well as convert between HP mnemonics (2 kinds) and other mnemonics (Jacobs/De Arras, and ZENROM), even generates opcodes and a symbol table. Using this, I've been able to create a commented 41OS HFF text file version.

I know I can disassemble other ROMs, but its the comments (and labels) that are particularly interesting to have.

Would love to have some other commented listings to look at/play with... in particular CX versions (41OS NFL, EXT FCN 2D, TIME 2C, CX EXT FCN, CX TIME), and any MCode ROM listings (ZENROM, HEPAX, CCD, etc). Let me know if you've seen any.

Thanks.
-RobertM
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