So, it's decided. With the inspiration of Reddit, I will use the 40x4 display instead of the 20x4. 
For the last weeks, I've been working on my monitor program. Not everything is implemented, but a lot of the functionality is working. Some optimization is needed... eventually.


  • Basic is yet to come. This feels like a big chore. Any suggestions? 
  • Convert converts between decimal, hexadecimal and binary (not yet implemented)
  • Diagnose tests the RAM. (working)
  • Execute a program in RAM (working)
  • Fill a region of memory with a byte (working)
  • Help... duh... (working)
  • Load a program from the computer via XMODEM (not yet implemented)
  • Memory map (working)
  • Processor status (sort of working)
  • Read, or memory dump of a region of memory (working)
  • Save a portion of memory (not yet implemented)
  • Time, set, or read time from RTC (working)
  • Write a byte or series of bytes to memory (working)



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