When I originally raised concerns about not being able to run Dev65, I thoughtlessly added it to a thread about assembler macros. Even though Dev65 had been mentioned earlier in the thread, my posting didn't really belong there, and I should have created a new, separate topic. Apologies.

Thanks to ...

Oh my goodness, that's terrible. I had no idea. I've benefitted considerably from his work in both hardware and software, which he gave to the public so generously.

My condolences to his family and friends. A really sad loss to all of those who interacted with him here.

I've downloaded Andrew Jacob's Dev65 assembler, mentioned here. Despite the name, it copes with several 8-bit CPU families, which is what I need, and I really like the look of the structured programming aids. But I can't figure out how to run it!

I know very little about Java, but my understanding ...

A quick update, which may help any others who want to try out this project.

I read the GitHub code for em-retro into MPLAB X, v5.30. When I built the project, I got a few warnings, which suggested that 'config…' at the start of a few lines should be '#pragma config…'. I made the changes and then ...

The USB to serial adapters I use all have the CH340 chip. They all work fine for connecting to Arduino Pro Mini boards, and to the SBCs that I've built.

Good idea about getting a hex display of the transmitted character, and thanks for the link. I'll do a bit more digging and see what I can find.

First post after my 'introduction', so please be nice.

Encouraged by two successful builds of Andrew Jacobs' "3-chip 6502" boards (6502 and 65C02), I decided to check out another project of his, "em-retro" – see links below. This squeezes 8 different 8-bit CPU emulations onto a PIC24 chip. The Z80 ...

Time to say hello, and get more involved.

I first encountered the 6502 at the very end of the 1970's, with a second-hand KIM-1. An Acorn Atom, then a BBC Micro soon followed. I learned a lot from all of them, but they are all sadly gone, and whatever proficiency I had with 6502 assembler is now ...