Sinclair ZX80 / ZX81 / Z88 Forums

4/0

Mark

Cheers Zsolt

I hope you are fine as well.

Mark

Ahh, I knew I had some information somewhere, I’d completely forgotten about this topic

Mark

Much more information here

Mark

Here are some photos (link).

The software this was used with is called Tasword Two, or Tasword Three.

Mark

The 26 way IDC connector pin-out is either the same, or similar to the Acorn BBC parallel Printer port (pin out here ). The cable for use with a printer is a IDC 26 pin connector to a 36 pin Amphenol connector (see these two Wikipedia articles here and here ). This is known as a Centronics printer i...

Yeah, either the ULA or the solder joints or PCB tracks.

Test on continuity between the ULA pin and the keyboard connector pin.

Mark

I’ll have a look/think...

Mark

Have you tested the existing resistor array (RP3) with a multimeter? With the ULA removed (if its in a socket), test between +5V and then each pin on the five pin keyboard connector. Each should measure 10kΩ. If the ULA is not in a socket, but is soldered in you can still do the test, but the ULA wi...

Don’t know, I just wanted to try it and see if the syntax checker would allow it!

Mark