FORTH & HP: where to start?

[rprosperi]

(05-18-2023 10:53 AM)mfleming Wrote:  Does anyone have the details behind the C71 ROM? It is a third party 64KB ROM with (I believe) Forth embedded in the code rather than as a separate 32KB hard ROM. C71 emulates all the Voyager models- I'd love to have the two keyboard overlays that went with it.

C71 was built using Soft Forth from CMT - the best resources about Soft Forth are on JFG's site here:

http://www.jeffcalc.hp41.eu/emu71/index.html#sforth

The full manual is available. After years of searching, it was finally found in a predictable place, Richard Nelson's collection, rescued when he dissolved that. Here's the PDF:

https://literature.hpcalc.org/items/1248

Fairly high quality images of the 2 overlays can be found in the Emu71/Win overlay pkg here:

https://hp.giesselink.com/Emu71/Kmlpc/EMU71_Overlays.7z

I have only seen 2 original sets of C71 overlays in all the years I've looked for them, and they're not for sale...

A well-known eBay seller for HP stuff has mentioned possibly making some to sell, but he wasn't sure how much interest there would be, so maybe he should find out? But someone please start a new thread for that, no need to further Hijack this one more than we already have...