Sinclair ZX80 / ZX81 / Z88 Forums

David G., No. The board is big and won't fit inside the cased computer. However, it is possible to put some demo. program on the EPROMs/ EEPROMs and run it. Expect something coming from me pretty soon. Hopefully, a short video with a computer with its case in use. :) I still have 4 “fixed” long boar...

My apology about a very long delay! :oops: However, I finally found a bad PCB fabricator work on the Issue 2.2 board! :o The U6 donut pad #10 spread onto a trace coming from the hole #19. The U6 is a 27C64/28C64. The problem is the pin #10 hole and the #19 trace tied together on the Issue 2.2. It is...

msknight,

Which ULA version does your computer have?

How is the video signal ULA pin #16 coming out of your computer with your oscilloscope?

Thank you.
Dessony

wilco2009,

Do I have a chance to receive the product from you at this point? I am in the USA. How much is it?

DesSony

Welcome to the forum!

Cheers,
DesSony

Still exact same old problem as above-mentioned! No change. I am still scratching my scalp.

DesSony

XavSnap and the rest of you,

I tried to load the Vb81_XuR emulator. The dialog box showed, "Vb81_XuR [return] Run - time error '380' [return] Invalid property value".

Now what?

Thanks,
DesSony

XavSnap and the rest of you, I received a T S Demo board yesterday (11/7/'22) from a carrier. T S Demo board V 2_2.JPG Direct connection. All components miss the computer's case. Go! :) Edge card connector hole size. Go! :) Edge card connector row spacing. Go! :) I can use a triangle piece as a key ...

Hi,

I am waiting for my PCB order to come to me from the overworld PCB Fab. Then we can see a result.

Cheers,
DesSony

All of you,

I placed a PCB fab order today. (11/1/'22)

Cheers,
DesSony