4 ms·

as this runs cp/m, i have to wonder if the atmega itself could run cp/m faster than the z80?

• bpye 3y ago
  It's been done before - but apparently the performance is pretty poor - https://spritesmods.com/?art=avrcpm https://spritesmods.com/?art=avrcpm
  • kragen 3y ago
    plausibly you could write a faster z80 emulator
    • volemo 3y ago
      At this point I think it’d be more fun to port CP/M to AVR.
      • kragen 3y ago
        i thought about that but you also have to port the apps, many of which use self-modifying code, which flash program memory is not enthusiastic about
        • bpye 3y ago
          Someone on the blog post linked suggested implementing the BIOS calls in AVR code with some sort of mode switch, I guess you could go further. Port CP/M keeping syscall compatibility but use a CPU emulator for application code.
          • kragen 3y ago
            sounds sensible
• kragen 3y ago
  the guy you're replying to got linux running on an atmega (but a bigger one)