Sinclair ZX80 / ZX81 / Z88 Forums

Kiwisek wrote:Does anyone have Eagle library with ZX80 or ZX81 edge connector? I would like to use it in my ZX80 3k RAM Pack reproduction and it would save me some work.

Yep, will upload when I get home.

Cheers.

Phill.

Both PCBs are now in the prototype production and should be ready by the end of the week. I will build both the next week and will make final correction and produce a small PCB batch of both. I will release the Eagle and PDF files, so anyone can make the PCB. Martin would it be possible to have the...

A big "thank you" for these developments. Hardware is nothing without software. ;) *waiting for digital samples playback* Hi Bruno, i guess that sample tracker playback would be possible, of course there would be no option to keep a active display on ZX81 during playback, it would just not be possi...

Though to be fair I will be visiting Maplins this evening as they have the 2x18 pin sockets I need for the Zx80 I'm building....

Cheers.

Phill.

angus wrote:Just a quick note about Rapid, we buy from them at work and their service is *excellent*.

Seconded, I have bought loads from them personally and never had a problem.

Cheers.

Phill.

Hi Phil, yes they are 8 bytes per character row, top row first, first 8 bytes char 0 , next 8 char 1, next 8 char 2 and so on. Phill :) :) but yeah assci text will do, i can manipulate them and compile it to a binary that i can then load on the zeddy. Here you go Andy, the complete Dragon Alpha and...

Further to my last post and the excitment of the weekend, i've been spurred on to actually work on a little something, i have something working, kind of and will post some pistures soon, but now i want to know where i can download some alternate character sets for the zeddy. it's a little tedious p...

sirmorris wrote: @Prime - The 8912/13 aren't pin-compatible - you'd have to build an adapter.

Yeah but I suppose with some fancy routing you could put the socket holes on for both.....
See AY-adapter on the DB folder.....

Cheers,

Phill.

Good point Rich - that's correct. I'm using the internal clock divider. If an AY is used then there'll have to be an additional chip. I might put a place for that as an SMD component on the rear of the board for the more adventurous ;) Additional chip ? Is this as a clock generator, or just a divid...

I stumbled across THIS schematic (and I just so happen to have a CDM6264 sitting here), but I'm struggling to see why the three NAND gates have to be there. What would happen if I connected everything else as shown but eliminated the three gates and connected A13 to /ROMCS on the ROM? Wouldn't it g...