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.
(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!
Gigatron - TTL microcomputer
- RetroTechie
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Re: Gigatron - TTL microcomputer
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
regards andy
what's that Smell.... smells like fresh flux and solder fumes...
- 1024MAK
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- Location: Looking forward to summer in Somerset, UK...
Re: Gigatron - TTL microcomputer
Today I received...
Mark
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
Re: Gigatron - TTL microcomputer
you gonna do a "Dave Jones" watch me build it while i prattle on about nonsense
Regards Andy
Regards Andy
what's that Smell.... smells like fresh flux and solder fumes...
- 1024MAK
- Posts: 5165
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Gigatron - TTL microcomputer
Err, no. Currently my work bench only has a ZX81 sized area that is free
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
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
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.