I've finished the first draft of numeric constant assignment in my HP-75 BASIC program lister. I'm sure I'm missing some corner cases, but decoding of positive and negative mantissas and exponents, as well as integers works for the small set of test cases I've coded up. Reverse engineering this stuff by looking at the file dumps is interesting, but slow.
I'd like to renew my plea for the HP-75 NOMAS material. It contains the token table, among other stuff. The "other stuff" no doubt includes things like nibble or bit packed field decoding where appropriate. I can figure that stuff out by hand, but I'd like to finish this project in the current decade. 8) I'm willing to pay a reasonable amount, if that's necessary. But what I'd really like to do is scan the material and add it back into the public corpus of literature on the 75C, which is where it belongs.
The project? It's my SWAPDEX effort to catalogue all the existing "swap disk" images. I want to be able to describe all the software to the extent possible. For the 41 and the 71, there are emulators into which I can load the software plus any ROM images required. No such emultor exists that is public at this time for the 75C/D. But the first several BASIC programs I tried to load on to real 75 hardware resulted in errors trying to list them. It seems that won't work if a ROM the program relies on is missing. That got me off on decoding the BASIC file format, which led to the current effort.
Thanks for any help you can offer.