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The YAZ180 is a modern single board computer, built on the tradition rich Z8S180 CPU and the AMD Am9511A-1 APU.
It is my attempt to create a perfect mix of “ancient” and modern computing technology. Specifically, it is an attempt to marry CPU/APU technology from 40 years ago, with modern I2C, USB, and WiFi capabilities, and make an powerful 8-bit computer that can either be embedded into an application, or operate as a stand-alone computer (with some accessories). It won't suit everyone, but it does exactly what I want.
The YAZ180 is supported by the z88dk and it is designed to work with both traditional CP/M v2.2 applications and modern z88dk C compiled programs. The YAZ180 is fully open source. All documentation and design is available from this repository.
There is a build diary, that contains dated information (i.e. potentially incorrect) in two posts.
The first post on what I was thinking about building, and some specification decisions.
The second post on outcomes, and what remains to be done.
Following these two posts I moved most of the documentation effort to github, and now it is all available there.
The concept and current status.
The PCB versions designed in Eagle 6.6, of which v2.4 is the current release.
The CUPL glue logic, supporting flexible memory mapping, and single step hardware with a break-point.
The bios implementation, supporting far calls with RST jumps (supported by z88dk), and supporting FATFS IDE drives.
The CP/M v2.2 implementation, which uses a FATFS formatted IDE drive.
So, is it finished?
Well, yes. The hardware is pretty much finished. Software projects are ongoing.
The perl script for ICP of the Flash is unfinished, because I stopped needing it.
The MP/M implementation is unfinished, because I got distracted.
The FUZIX support is unfinished, because I've not had time.
Enjoy.