Search found 8 matches

by Fecn
Wed May 17, 2023 9:53 am
Forum: Z88
Topic: SD card cartridge?
Replies: 3
Views: 5888

Re: SD card cartridge?

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
by Fecn
Mon May 15, 2023 4:36 pm
Forum: Z88
Topic: SD card cartridge?
Replies: 3
Views: 5888

Re: SD card cartridge?

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...
by Fecn
Tue May 02, 2023 3:50 pm
Forum: Z88
Topic: 512K flash memory internal upgrade - no traces cut
Replies: 18
Views: 20933

Re: 512K flash memory internal upgrade - no traces cut

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.
by Fecn
Tue Apr 25, 2023 10:01 am
Forum: Z88
Topic: Diagram for making your own cartridges?
Replies: 15
Views: 16507

Re: Diagram for making your own cartridges?

@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...
by Fecn
Mon Apr 24, 2023 5:09 pm
Forum: Z88
Topic: Mechanical keyboard?
Replies: 6
Views: 6235

Re: Mechanical keyboard?

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...
by Fecn
Sat Apr 08, 2023 1:21 am
Forum: Z88
Topic: Diagram for making your own cartridges?
Replies: 15
Views: 16507

Re: Diagram for making your own cartridges?

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...
by Fecn
Sat Mar 25, 2023 3:46 pm
Forum: Z88
Topic: Diagram for making your own cartridges?
Replies: 15
Views: 16507

Re: Diagram for making your own cartridges?

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 ...
by Fecn
Fri Mar 17, 2023 8:33 am
Forum: Z88
Topic: Diagram for making your own cartridges?
Replies: 15
Views: 16507

Re: Diagram for making your own cartridges?

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 ...