I did have that "power cartridge" (cant remember the exact name) that was plugged on the side in the expansion port of my A500, by pushing the switch button it would halt any running program and give me full debug mode and RAM editing. Used that to cheat in games at first, then crack a few protections, then learn a bit of 68xxx assembly... Of course nowadays you have integrated dev environments that do a lot better (with a lot more comfort !) but i did learn quite a bit with that thingie, and I had a motivation (game cheats !). Today you can find the same tweaking pleasure in fiddling with an RPi and putting it on a remote controlled toy and have fun with hardware level programming. And the tooling is light years ahead..
Action Replay ??
Ahhh yes that was it. Thanks for the reminder
I think we all did...I certainly got my first experience with a hex editor when I had the Amiga 500. The Action replay cartridge was a mustYeah i had one for the C64 too, that was probably that one. Really hardcore stuff when you're a kid, debugging hex codes and assembly breakpoints, but i guess i learned that way