Sinclair ZX80 / ZX81 Forums

Have you just listed 3 2 of these on eBay?

I hooked up a keyboard borrowed from elsewhere and that works fine. Presumably I got the diodes the roght way round! Shortly after taking the photo of boulder crush the screen started jumping a bit - horizontally which is strange. It does this fairly consistently after a while. But only with hi-res ...

Yes. I keep forgetting about the tape scrubber. I originally socketed the new 6.5 MHz crystal so decided to remove the socket and solder it in. Did this and switched it on and got nothing. Arggghhh!!!! So I removed it and soldered in a reclaimed one from a nearly bare board and it worked straight aw...

The ZX81 for sale in this thread is priced at £30.95 (plus postage). Using the exchange rate that Google uses gives a price of $40.11 USD (not including postage). Mark I am happy to get a postage quote for p&p on the linked zeddy if you are interested. It is a nice one with the famous maths bug. Fu...

Having swapped all of the chips and replaced the resonator I figured that the only things left that could be dodgy were the transistors. So I changed them.


And there we go. A K again!

Now I just need to fit a video out without killing it...

Bump. Still here if anyone is interested?

Edit - taken.

I did have one guy on eBay say that the serial numbers were eventually insisted upon by certain retailers such as WHSmiths. I asked him how he knew but he never replied. The only ones I have seen have been green and the serial number printed on the smooth recess to the right of the one shown. But he...

Hello all

I saw this on eBay:-


I have not seen one with a yellow serial number before - just green ones. Close up it looks to be properly printed on.

Anyone any ideas what the story is with this one?

Lardo

Wow. I have absolutely no use whatsoever for a zeddy with 1MB of RAM but I really want one!

I often wondered why nobody built a bus extender with a socket for the zeddy side, a piece of flexible ribbon cable and then another socket. Instant isolation of most things. Certainly overly enthusiastic keyboard mashing anyway.