CP/M Plus (finally) booted

A project log for Z80 Microcomputer System

A small Z80 computer with composite video, serial and a hard drive with CP/M

256byteram256byteram 07/17/2014 at 11:444 Comments

Okay so it has been quite some time since I've provided an update. I've got good news however. I have at long last got CP/M Plus to boot correctly on my hardware and got it to use bank switched memory.

The disk access speed improvements are significant. That and it's capable of accessing partitions up to 512MB, much more than CP/M 2.2's 8MB limit.

Here are some things I learned about CP/M Plus:

I'll add more as I think of them.

In the meantime, please enjoy this picture:


FloppySoftware wrote 07/01/2017 at 09:17 point

Give a try to my CP/M text editor: te.

It's in my github. More info in

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matseng wrote 03/03/2017 at 02:36 point

Have you found a usable plain text editor for CP/M?  ED is just horrible, but considering its age that's just to be expected. ;-)  I can't get the MIX editor working at all, and while I can use Turbo Pascal 3.0 as a text editor it doesn't feel right - and the arrow keys doesn't work either...

Maybe I need to write my own simple text editor in Z80 asm ^__^

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256byteram wrote 03/03/2017 at 03:15 point

There's WordMaster which is a bit like vi but by the same people who did WordStar.

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matseng wrote 03/03/2017 at 05:14 point

Thanks. I'll give it a go and see if I survive - vi is not really my cup of tea. But it can't be worse than the cp/m ed. ;-)

In currently hacking on a z80 cp/m 2.2 emulator for ESP8266...

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