Gigatron - TTL microcomputer

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RetroTechie
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Gigatron - TTL microcomputer

Post by RetroTechie » Sun May 13, 2018 12:13 am

Hi, anyone stumble across this already?

A simple 8 bit micro, with an EPROM and SRAM chip as main memory, but using only TTL chips for the CPU. 8-) :ugeek:
(74HCT actually, for those of you playing along at home ;) ).

Homepage: https://gigatron.io/
Aussie electronics boffin Dave Jones just did a review on it: EEVblog #1080 – Gigatron TTL RISC Kit Computer Review (direct YouTube link). Also interesting (and funny) is his next video where he cuts out bypass capacitors one by one, and -unsurprisingly- the thing keeps working.

Generates VGA color video in a similar fashion as a ZX81 generates composite. And comes in a very nice housing to boot. Designers from the NL.
Quite the bobby dazzler! :lol:

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Andy Rea
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Re: Gigatron - TTL microcomputer

Post by Andy Rea » Wed May 16, 2018 9:51 pm

ah i watched the Dave Jones video, he makes me laugh. very interesting little project, i doubt very much i would buy one, i was thinking that it must be a eprom based state machine of sorts. i can see how with so few other ttl chips it would be posiible otherwise.

regards andy
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum

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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: Gigatron - TTL microcomputer

Post by 1024MAK » Sat May 19, 2018 12:12 am

Today I received...

IMG_7106.JPG
gigatron kit
IMG_7107.JPG
gigatron IC's
IMG_7108.JPG
gigatron PCB
Mark

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Andy Rea
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Location: notts UK

Re: Gigatron - TTL microcomputer

Post by Andy Rea » Sat May 19, 2018 9:29 pm

you gonna do a "Dave Jones" watch me build it while i prattle on about nonsense :mrgreen:

Regards Andy
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum

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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: Gigatron - TTL microcomputer

Post by 1024MAK » Sat May 19, 2018 10:28 pm

Err, no. Currently my work bench only has a ZX81 sized area that is free :shock:
Really need to tidy it up, but have various jobs in the garden that need doing...

When I do build it, I will take a series of photos though.

Mark

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