Sinclair ZX80 / ZX81 / Z88 Forums

Count me in for a ZX80NMIX board!

Got mine yesterday. Thank you!

If anyone want just the PCB, I still have some.

No, its corrected.

Looks like one of the first Grant's versions. I did a different silkscreen and never shipped anything to Bulgaria.

Just PCB and JED would be also fine, if available.

Martin

All the guide instruccions have been very useful and clear and all is fine. I have to say the same. Congratulations to the very nice guide! Not many people today can do such easy to understand guide for beginners. Good job! Btw. I placed Louis Seidelman's RAM test for download to my blog http://www...

This is a good idea. I put it on the top of the board on mine ZX80 CORE. One pin to the hole for unused R31 and the other one to the R96. http://www.8bity.cz/wp-content/uploads/2013/09/ZX80Core_Martin_EPROM_pin1_pulldown.jpg The othe 10k pulldown I put on the bottom between pin 27 of EPROM and the u...

But the EPROM type 27C512 fits into this socket and is supported as well. Of course does this EPROM need a pull down resistor in same way as for the 28C256. For the 27C512 to work you have to also disconnect the WR signal by removing R97, otherwise it pulls it up to 1 always. Thanks for that great ...

I managed to build the ZX80 Core this weekend. It is nice machine and works perfect. Thank you PokeMon! Great work! You can find photos at http://www.8bity.cz/2013/dalsi-klon-sinclair-zx80-zx80-core/ . There is actually also some text :) but sorry for the language. You can try translate in upper rig...