Sinclair ZX80 / ZX81 / Z88 Forums

Many thanks for the information Gentlemen,very grateful.

Yup concur with that ring bound issue one, proper binding issue three onwards. Not forgetting there was also a slimmed down smaller sized version of same manual which I'm sure I possess somewhere or other. Also my ZX80 power supply and cables are for sale £5000 each, no euros,dollars or Venusian loo...

@Mark. 2 questions. 1) What is the value of missing resistor? 2) Seeing that the US model has a different modulator will a UK board with added resistor work as NTSC or do I need the modulator? The reason I ask is that if it works I might just burn an EPROM with the NTSC version of H4th. (Pluri Forth...

@ Retro Techie. Great information there as always many thanks for that. :D @ Lardo keep sparking, it helps to increase this idiots knowledge :lol: @Mark Thanks for spoiling my bloody fun,I was going to dedicate the next 10 years to finding that sodding logo!! :lol: No seriously,concise and well expl...

Like I said Fwapp ignore me.

What I am going to do though is trawl the world find that bloody logo and report back!!!

Thanks from me too Karl great info as always.

Do you know Fwapp I'm beginning to doubt myself now!!! :oops: For some strange reason Plessey is running around my brain and I'm sure they kicked out a few chips for Ferranti with the "nice" writing on them but then again I was sure about my last post. Ah knackers to it ignore me I'm spouting bolloc...

On speccies that normally means it's manufactured in the UK, rather than in the Philippines. Hmm could be, I suppose but I,m 99% sure it donates an NTSC ULA rather than a pal item which as far as I'm aware will work in a pal system. Note the ULA pictured on this zx81 USA chip and the one for sale o...

I would add that was with the first issue of replacement membrane so not sure if say the newer Xpand compatible type has a thinner top layer, which I believe was mooted at some point,than the original which in MY experience made key board entry worse than Sinclair's' effort regardless of nice they ...

The wealth of knowledge found at this site is immense and would be a good place to start....

https://www.worldofspectrum.org/forums/

The ULA looks interesting insomuch that it bears the fancy little "diode" logo found on NTSC ULA's.