MCODE: Card_Reader 1G ROM

[Jake Schwartz]

(05-13-2019 07:22 AM)Ángel Martin Wrote:  Yep, so I'm now looking for the "HP-67 Byte Table"- if such a thing ever existed?
I seem to remember an article on PPC dealing with the HP-67 instruction codes, but again, it might be just a figment of my imagination...

My guess is that there must be a look-up table mapping 67-instruction codes to 41-byte_table values. Time for another wading session...

The initial HP-67 8-Bit Program Codes table appeared at the end of Louis Cargile's article, HP-67 Internal Codes and Quasi-Alphanumerics, from HP65 Notes Volume 4, Number 1, pages 5 - 8 (1977). Some of us remember Lou as the inventor of the HP-67 "Black Box", first described in 65 Notes V4N5 in his amazing article "Zen and the Art of HP-67 Maintenance", starting on page 4. Building that box was my very first soldering adventure :-)

Jake