Key Codes in Program Listings (70's/80's calculators)

[vassilisprevelakis]

(04-15-2024 01:44 AM)Garth Wilson Wrote:  When I used the TI-58c and 59 in the early- to mid-1980's which showed only numbers in the display, and I programmed lots, all the key codes were ingrained in my mind and very automatic [...]

Same here, I started with a TI-59 and knew the op codes by heart, but still it was a pain to check a long program for correct entry. So when I upgraded to an HP-41C (which BTW I still have) I was extremely happy not to have to worry about key codes.

Recently I was given a TI-56 which even though it can connect to the PC100A print cradle (like the TI-58 and 59) it just prints the line number and op codes. No mnemonics.

So I wrote a small spreadsheet that will convert keycodes to mnemonics and thus produce a listing similar to what you would get with a TI-59 and PC100 printer.

The approach can, of course, be carried over to most calculators of the era with similar encodings.

Vassilis
http://www.series80.org