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

[Didier Lachieze]

There is a tool for that: look for romnut in asmnut under utilities on TOS.

Form the documentation :

Quote: 3. The ROM maker

The aim of this tool is to provide the 'easiest way' to simply build and create its own ROM.

The context is that we have access to a lot of module image, embedding a lot of instructions. But several ROM give the same functions. Also, two ROM may be uncompatible due to the XROM number choosen, or the number of pages needed. Also you may have to load a ROM for only a couple of functions.

Starting from this, I decided to split several ROM into simple fonction or group of functions. And after, I wrote the ROM maker driver romnut to create a source file, and call the assembler and so create my own ROM from parts of others ROM.