Lately z80pack got better support for bare metal systems, like the Pi Pico microcontroller designed at Raspberry Pi. A dev prototype system with a Pi Pico was build on breadboard and used as a research system. While this is good for development, not everyone wants to wire a system on breadboard with breakout boards for the tiny circuits. This also is sensitive for moving around and transportation, so we need something more convenient.
For the Raspberry Pi Pico board a number of extension boards and headers exist, the one used here is this:
Waveshare Evaluation board product page and Waveshare Pico Eval Board Wiki
To install z80pack on this device:
- clone z80pack: git clone https://github.com/udo-munk/z80pack.git
- checkout dev branch: cd z80pack; git checkout dev; cd ..
- clone this: git clone https://github.com/udo-munk/Pico-Eval-Board-80.git
To build the application for a Pi Pico RP2040 board:
cd Pico-Eval-Board-80/srcsim
mkdir build
cd build
cmake -G "Unix Makefiles" ..
make
This device also can be used with a Pi Pico 2 RP2350 board, then build with:
cd Pico-Eval-Board-80/srcsim
mkdir build
cd build
cmake -D PICO_PLATFORM=rp2350-arm-s -G "Unix Makefiles" ..
make
You can also use PICO_PLATFORM=rp2350-riscv if you have the appropriate RISC-V toolchain installed.
Flash picosim.uf2 into the device, and then prepare a MicroSD card.
In the root directory of the card create these directories:
CONF80
CODE80
DISKS80
Into the CODE80 directory copy all the .bin files from src-examples. Into the DISKS80 directory copy the disk images from disks. CONF80 is used to save the configuration, nothing more to do there, the directory must exist though.
Here a few pictures how Z80pack running on the device looks like:
