I was thinking, there are a lot of these new serial memories and other devices out there. A number of people talk here on designing processors, maybe a 6502 type processor that runs with the modern serial memories would be a nice device for small circuits.

Or -
Adding a Serial bus to a 6502.

A few years ago I started on a 6502 emulator. I have some of the instruction working but that's incomplete.

What works is the machine language monitor with Asm, Disasm, Memory Dump, Register Change, Trace, Go and several other features.

The code is all written in C.
Here it is with the source and ...

I have written a Machine Language Monitor with assemble and dissasemble functions in plain C. It was part of an unfinished 6502 simulator project. If anyone is interested, send me a private message.

Some of the Pet have a built-in Machine Language Monitor. You can access it by going to a BRK instruction, typically the basic command is SYS 1024

A person with a working Commododore Unit can write a simple machine language program in the tape buffer that patches the USR command. Put the byte of ...

I think that a system with a command line interface OS should be used, languages should be left to the individual and loaded from disk or add-on cartridge. One of these modern serial ROM's could be used to load languages into RAM on startup.

Another possibility is to make the CLI operate in a ...