Sinclair ZX80 / ZX81 / Z88 Forums

The Harlequin uses the AD724R circuit to create a composite video signal and I wonder why the signals Chroma und Luma are not used as it offers a S-Video (Y/C video) output for free which give a better color signal than the composite video. Actually Ingo suggested me to add a S-Video output too, by...

Moggy wrote:For Those who missed it the boards on ebay sold for £210

Last couple years I sold it for $119.50 for one PCB.
I remember someone ask me to scan both sides, he said he would send to Grant and I did.

Coould it be so you could use a different length cable and put this board inside of a display case where it isnt visible, that way, if it is a demo program, you could have the computer running the demo and the only thing showing is the cable?

YES.

It is demo board for TS1000.
Plug into TS1000 it will auto start program that show challenger space.

count me too!!

@ Andy, On board I have 3.3V regulator and ltc1799 chip for generate 6.5MHz.
@ Phill, I will order 9572 64pin soon , I can ship 1 to you.

Here is layout for 95108, have not include oscillator circuit and pin for programming yet. And need to add copper pour fro ground plan.

@Phill
I see Digi-Key has 64 pin 9572 in stock, 95108 is a little bit bigger, not sure it can be fit.

@ Sirmoris
Thanks!!

Here is what I layout, fit xc9572 into 600 mil space.

Thank you for detail.

Hi,

Sorry I don't have that magazine any more, I sold on ebay after I scan it.
I don't know who bought it, may be you can ask around.