Sinclair ZX80 / ZX81 / Z88 Forums

Hello all! I'm trying to bring back to life a ZX81 Issue 1. Symptoms: No picture on TV, no matter if I use the modulator signal or composite video mod. Measurements: 5 Volts on all Vcc pins of chips (OK) RESET (Pin 26 of Z80): 0V at power-off. It goes to 4.20V at powering on. CERAM OSC (Pin 36 of UL...

I can remember this line

IF USR 16514 THEN REM

Greetings

Good idea!
We´ll be waiting for this nice job!

I have no words...

Another bunch of ULAs:

http://www.ebay.es/itm/261260524813?ssP ... 1497.l2649

Good luck!

Hola, Miguel Ángel. Sólo unas palabras en español para darte la bienvenida a este, tu foro. Muchas gracias por compartir tus programas y experiencias. He descargado tu programa, y lo probaré en cuanto tenga un momento. Hi, Miguel Ángel. Only a few words in Spanish: Welcome aboard. Thanks for this fa...

Good job!
I like it!

Thanks for the info

Pokemon wrote:There are solutions for the ZX81 to connect a keyboard via slot edge connector to ZX81.

Pokemon: What are theese solutions like?

thanks in advance.

I like it!
Good job.