This computer was made during the winter of 2007/2008 as a hobby project.
Features:
- ZiLOG Z80 CPU @ 4MHz
- 32 kBytes of RAM
- 32 x 32 char B&W alphabetic display adapter
- 1 kBytes of Video RAM
- Full stroke keyboard
- Built-in monitor program
The machine consists of two boards (CPU and video) and a keyboard, just connected to each other via ribbon cables.
The character geneartor and the system ROM was burnt into two 27C256 UV EPROMs. For the character generator, the best way seemed like downloading the C64 character set and burning it into mine. For OS programming, I used the ECAL Z80 assembler.
Unfortunately, the schematic diagram of the video board is still not drawn, but the CPU board plans are downloadable.
News
01-11-2010
New design, separated webpages.
