How to make a custom HP-41 rom for the rest of us

[Ángel Martin]

If I've been able to do it then anybody else can too. The key is the development environment - several tools exist, some more professional than others and usually the more professional the more background knowledge is required.

For instance I don't use a "proper" compiler/assembler, rather some excel sheets and macros. This is involved; you need to do some manual steps that normally will be handled by the assembler - but the editing capabilities are unbeatable: copy, paste, move, swap, replace, hyperlinks...

Since I have all the source code already in excel templates, the "GeneDream" module could be put together in a couple of hours using this method - although I'd suggest some consolidation of functions into more-capable ones, with prompting options - but this is a personal thing.

I've never tried the ROM MAKER posted at TOS, but it sounds like a good idea for relatively simple modules, without lots of common subroutines or advanced features (say tables, secondary FAT's, bank-switched pages...). Also I think that tool doesn't run on Windoze, is that correct??

'Best,
ÁM

PS. Probably the "couple of hours" estimation is wrong: I didn't notice those Card-Reader functions, which will add substantial time to the project (not so trivial...)