ASM Programming with HP50g

[hth]

Not that it answers your questions, but just some random notes.

With JTAG you connect to some debug port on the chip, there are different connectors and it may or may not be exposed on a production device.

On the computer side, you will need some cross development tools. They are mainly for C/C++ and connects to the JTAG device, usually with USB. Many debuggers can do assembly level debugging, allowing you to see registers and stepping in assembly source code, but that is not always the case, or the experience may be somewhat less than ideal in the user interface. As I said, they are usually targeted to C/C++ level debugging.

The HP50G is not what I would think of as my first choice when it comes to playing around with at this level. (I base this on my experiences with the HP48, the HP50G may be a different story.)

For example, you can get the Pinetime smart watch for small money if you want to play with ARM and do something fun. You could go to the Swissmicros DM43 if you want to do some new development on ARM.

If you want to mess around with assembly level programming on an HP, the HP41 could be an alternative as we have so much in depth information on it. I develop at assembly level with the HP41 and can step around and see what is going on internally. Basically all information is around, fully documented source code and several tools to choose from.