What is it?

z80ctrl is an AVR-based bootloader, debugger, and I/O device for a Z80 retrocomputer with the following features:

• Plug-in module for RC2014 retrocomputer replaces the clock, serial, ROM, and CF boards
• Runs CP/M-based software including WordStar, Zork, Ladder, Turbo Pascal and more!
• Loads HEX files, binaries, and CP/M disk images from a FAT32-formatted SD Card
• Provides Altair-compatible serial ports and disk controller
• Full compatibility with unmodified Altair disk images from the SIMH emulator project
• Monitor with memory inspector and built-in Z80 disassembler
• Single-step debugging, breakpoints, and watchpoints to trace Z80 bus activity in real-time
• Allows bridging other SPI peripherals to the Z80 using the optional I/O expander card
• Flexible MIT-licensed firmware can be the basis of your own SBC or breadboard computer

Why did you make it?

I put together this kit based on J.B. Langston's design (and with his blessing) because I wanted to make this card more accessible to those not willing or able to source the parts themselves.

What makes it special?

This board allows you to take your RC2014 to a higher level of convenience and capabilities. For example, using this board makes it easy to play games of legacy gaming systems.

This kit comes with all the part necessary to build the z80ctrl board.

Kit Materials

If you order the complete kit, you will get the following:

The ATMEGA1284P that is part of this kit comes pre-loaded with the MightyCore boot loader.

If you order the PCB only, you will get exactly that, the z80ctrl PCB only.