TV Typewriter is just a stepping stone and by now we also have a small monitor program. To stay in retro style, this time we didn’t invent our own but we faithfully ported the Apple-1 built-in monitor program to the TTL architecture: the infamous Woz Monitor!
Now you can directly inspect memory locations, write to them and execute code on the hardware itself.
Steve Wozniak’s original is 254 bytes, our version is $254 bytes. About half of that is for terminal output, or character printing. The Apple-1 had dedicated hardware for that, something we’d consider cheating of course [tongue in cheek].