Sinclair ZX80 / ZX81 / Z88 Forums

Very nice ... What a haul! Do you think the seller had some connection with memotech or was he simply a fanboy or perhaps authorised service agent or somesuch? It is possible, he was a repair agent for other computer systems, he did however also talk about trawling computer fairs in the UK for part...

I finally got a chance to photograph and upload the pics for these interfaces.

https://secure.flickr.com/photos/264960 ... 194989900/

Enjoy!

Its not a major issue for me as my other 5 zeddys work fine.

If you wanted to be completist then I think your in UK so I could always lend you the machine for a couple of weeks!

G

Forum already has picutures and description of the mod. http://www.sinclairzxworld.com/viewtopic.php?t=95 You can load/save/delete/cat as normal, but even the simplest program like 10 PRINT "GRAEME" 20 GOTO 10 Will print the first GRAEME then error with a wierd code. I can get the exact codes at som...

I thought I was going insane as zxpand didn't quite work right on my first zx81 so I always assumed it was me being stupid.

Turns out it doesn't quite work right on Issue 1 boards with the two chip ROM mod on CPU (no idea what this mod is called).

MT06-03 is the Hi-res pack, MT07-02 the Centronics, MT09-02 the 16k rampack. Pity You haven't got MT11-02 the Z80 assembler pack, the most useful of the lot. Moggy EDIT MT11-02 is also the part no for the Memotext word processor, but as the board is identical except for the omission of a chip here ...

This was my plan, some of the interfaces have obviously been modified post manufacturer.

I have got a load of Memotech Interfaces from someones shed outside of their nice cases.

Here are my gueses as to what they are, anyone fill in the blanks or correct?

MT05-XX 32K Ram
MT06-XX Unknown
MT07-XX Centronics
MT08-XX RS232
MT09-XX 16K Ram
MT10-XX Keyboard Buffer

Hi RWAP, I am planning to get your membranes for the machines which have crumbled so much that there is nothing left of the ribbon (there is at least one, it literally disintergrated into flakes). But there is also some joy in repairing using the original parts. Using a combo of Mark and sirmorris m...

Ok, having recently got a load of old zx81s most with cracked membranes, what is the trick for inserting then back into the molex connectors once shortened down?

The pins on those connectors seem far to stiff for the floppiness of the zx81 membrain.