Projects for Sinclair computers (ZX80, ZX81, TS1000, TS1500, TS2068, Spectrum and clones such as the Minstrel 2 & 3).
Note!
These projects maybe work-in-progress and thus not completed or fully tested!
Check out the ZX81 bus extender here - should do the job!
The cursor keys on a ZX80/ZX81 are the 5/6/7/8 numeric keys along the top row. My simple brain can't readily adapt to this in games like ZX80 KONG or PACMAN so this is just a ZX80/ZX81 compatible keyboard with additional cursor keys. Designed initially for use with the Minstrel 2 computer (ZX80), but can also be used with the ZX80, Minstrel 3/ZX81 and Minstrel 4th/Jupiter Ace.
- Minstrel 2 (Sinclair ZX80 Clone): Part 3 (Gaming Keyboard)
- Gaming Keyboard for ZX80/ZX81/Minstrel/Jupiter Ace: Part 1 (Minstrel 2 Test)
Small daughterboard to fix the ZX80's pixel synchronisation issue on the Minstrel 2 computer v2.8 or earlier. I have a v2.6 board.
Minstrel 2 (Sinclair ZX80 Clone): Part 2 (Pixel Synch. Issue)
Recreating a DIY centronics interface from German computer magazine c't.
Yes, yes, it's been done many times before.
I'm finally getting my hands on a Cambridge Computers Z88. I realised that the Universal Backpack Drive (UBPD) I have for the NEC-PC8201A will also work on the Z88 but requires a converter board. It's possible to order one from Soigeneris when you order a UBPD and there is an existing design available on Github, but I thought I'd also have a crack at it.
Cambridge Computer Z88: Part 2 (Backpack Drive - First Attempt)
Simple board to convert Z88 DE9 serial port to standard DE9 to use with Serial-to-USB converter, for example.
The original keyboard on my Z88 seems a bit flaky - let's try designing a nice, modern replacement.
Serial interface converter for the Z88 to use a VDrive.
My attempt at a ZX81 clone using the vLA81.