Gigatron, TTL computer kit without a CPU

Posted by FullyFunctional on Tuesday October 02, 2018 @09:02PM
from the gigatron.io dept.

( 3 comments | 9 points | on HN )

Re:Gigatron, TTL computer kit without a CPU by FullyFunctional on Tuesday October 02, 2018 @09:21PM (#18126988)

Provenance: There was a recent post about PiDP-11 which is awesome in itself, but the page led to this which is probably more remarkable than is apparent at first; a Single Board Computer which implements all logic in TTL and with a remarkable functionality given the relatively few chips.

There are many SBCs of the era using more chips that this, despite having a Z-80 or 6502 onboard.

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Re:Gigatron, TTL computer kit without a CPU by IWeldMelons on Wednesday October 03, 2018 @04:18PM (#18134439)

I bet these are built with 74HCxx ICs, which are not TTL whatsoever; in fact they are CMOS.

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Re:Gigatron, TTL computer kit without a CPU by ttldude on Wednesday October 03, 2018 @05:27PM (#18134960)

You can build them with 74xx, 74LSxx as well as 74HCTxx, or mix those. Mixing with 74HC is also possible if you're careful, but full 74HC won't work.

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