Tellab TL801

Discussions about Sinclair ZX80 and ZX81 Hardware
nollkolltroll
Posts: 281
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: Tellab TL801

Post by nollkolltroll » Fri Mar 08, 2019 3:48 pm

neazoi wrote:
Mon Feb 25, 2019 11:12 am
Naked PCBs would be very fine, and useful if someone wants to take his chance to copy it. Just make sure they are good quality scans, these will be very valuable.
I guess you have seen Searle's NMI generator page?
I do not think your clone includes an nmi generator at all, the NMI requires 6 more chips or so. So your only chance with this would be the 8K rom in fast mode.
OK, here is a scan of the naked PCB @1200 DPI jpeg, but I think the post-processing would be quite extensive to make a copy of this. The bottom layer would be OK to copy, but the top layer also has printed text which messes with the track visibility. Also, LOTS of vias!

I've decided to build the kit, so I hope someone shouts quickly before I go too far if they want another scan :)
Attachments
TL801 PCB.zip
(16.17 MiB) Downloaded 37 times
/Adam

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zx81jens
Posts: 190
Joined: Sat May 10, 2008 8:26 am
Location: a Basement in Nienburg / Germany

Re: Tellab TL801

Post by zx81jens » Fri Mar 08, 2019 5:36 pm

Well, you just reminded me to have a look at my TL801 :-)

You can coose between ZX80 or ZX81 Mode with a Jumper (Yellow)... the Jumper on the left side is to change the Backround (black on white or white on black). Without Jumpers the ZX80-Mode is on...

tl8018081.jpg


Greetings
Jens
eyerything will be okay in the end.
if it´s not okay, it´s not the end.

and: uıɐbɐ ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ɹǝʌǝ ɹǝʌǝu ןןıʍ ı

nollkolltroll
Posts: 281
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: Tellab TL801

Post by nollkolltroll » Fri Mar 08, 2019 7:38 pm

The PCB is surprisingly good quality. MUCH better than Sinclair :D
/Adam

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