Minstrel 2 ZX80 Compatible Computer FULL KIT with dual keyboard

This is the full kit to build a Tynemouth Software Minstrel Issue 2 computer, with dual 4K / 8K keyboards.

The Minstrel 2 is a Z80 based 8 bit computer which is a clone of the original ZX80. It sticks to the original design, the only changes being 16K of RAM and a composite video output with a backporch signal that was missing on the ZX80 and early ZX81s. It can run the original ZX80 4K BASIC or the later upgrade 8K BASIC.

Note it follows the ZX80 design, so although it can run ZX81 software with the 8K BASIC, it lacks the fast/slow mode of the ZX81 so cannot run any ZX81 software which requires this (including most games). If you want full ZX81 compatibility, see the Minstrel 3.

The kit includes two keyboard modules, one blue with 4K BASIC keyboards, one green with 8K BASIC keywords. These can easily be unplugged and swapped to match the selected version of BASIC.

This auction is for the full kit of parts. This kit includes the PCB, IC pack, component pack, two keyboard kits and printed instructions. 

This is the updated V2.9 PCB with improved video circuitry, in green. This version can be fitted with either a 7805 switching regulator or a 7805 + heatsink (switching regulator and 7805 included, but no heatsink). 

See other listings for PCB only and a built and tested version.

More information on my blog:

http://blog.tynemouthsoftware.co.uk/2022/09/minstrel-2-pixel-synchronisation-part-1.html

63946_el Build Instructions v2.9B_9106f.pdf [2124.7] KB