Sinclair ZX80 / ZX81 / Z88 Forums

The link for the telegram channel is in the left-hand panel at https://cambridgez88.jira.com/wiki/spac ... ode=global

https://t.me/cambridgez88

I believe it's under development by Martin Silo(u) who pop up on Telegram from time to time. - Last I heard it was still under development with the promise of the next version being 3x the speed of the first one. I'm hoping we'll hear some more news soon as I'd also like to build an SD card for my m...

I've just upgraded my 2nd Z88 using this forum post as a guide. I now have two Z88s with 512KB/512KB onboard memory. I thought I'd leave a reply on here just so that others know that this post is still the best upgrade documentation to follow, and to say thank you to Jamie for documenting the process.

@Fecn Thanks for updates ! Does your v1.1 design have the updated correct pin spacing? I'm interested in making some EPROM carts in addition to Fecn's flash cart. Unfortunately the design posted by Xavsnap was using 1.27mm spacing, but if you grab it from my github instead you'll get the fixed vers...

There is always the other route to a mechanical keyboard... using the emulator on a PC. Personally I love the Z88's keyboard, but I can understand the need to have a path avaiable for an alternative replacement. One of my Z88 keyboards has gone soft around the enter and cursor keys which causes acci...

I'm delighted to be able to report that revision 2 of the boards has arrived and I've tested all three of the possible configurations successfully. I started out with a 512K SRAM as a test (decoupling caps missing because I was still soldering when I took the pic). The RAM chips I used were about £2...

For V2 of my design, I decided to make my design support either Flash or SRAM chips. It is now possible to use either of the following: * 1 x AM29F080 to get 1MB Flash Configuration * 1 x HY628400A or AS6C4008 for 512KB SRAM (short the 512K solder jumper). * 2 x 512K SRAM chips with a 74139 chip to ...

Just an FYI for any interested parties - I ordered some of my 1M Flash design from JLCPCB and my order arrived yesterday. Only after soldering a chip in place and trying it in my Z88 did I discover that the pitch on the Z88 connector is incorrect. It appears that the correct spacing for the pins is ...