roelhThe Isetta made it to the front page !
The Computer We All Wish We’d Had In The 8-Bit Era by Jenny List.
We take all kind of pills
That give us all kind of thrills
But only one thrill is gonna stay
Thats the thrill that you'll get when you find your project
On the cover of the hack a day
(Hack a Day) Wanna see my project on the cover
(Day) Made a big printout just for my mother (yeah)
(Day) Wanna see my smilin' face
When my project is on Hack a Day
Thank you, Jenny !
Understand a little Dutch ? We've got you covered. There is a nice cover of the cover....
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Dr Matt Regan on YouTube had a Z80 TTL computer before you.
https://youtube.com/@drmattregan?si=3HBWGR9niP8KzCvZ
In fact he has a full TTL Sinclair Spectrum clone in his channel.
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Hi Paul, in his video https://www.youtube.com/watch?v=y04AH5Q3Z3I he shows his Z80 TTL system working. But he only implemented a (small?) part of the instruction set. It's not clear which instructions he implemented and which he left out. But his demo can only show the copyright message at the start of a ZX81.
His Sinclair Spectrum clone uses a regular Z80 cpu (https://www.youtube.com/watch?v=N36iWYcXBAE) and not a Z80 built from TTL.
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Congratulations! This looks like an amazing project.
Don't be discouraged by all the ZXSpectrum nostalgia in the comments, there. They're the loud ones, the quieter ones are busy actually reading your logs, rather'n commenting there.
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Having read it through, I've gotta say I really dig this concept. Over the past several years I've been noticing similarities between 8-bitters and contemplating a sort of universal approach to teaching/using them. The idea basically boils down to recognizing a core set of instructions/registers/flags in all devices and only focussing on using those. It's basically like treating all 8bitters as though they're RISC, at the lowest common-denominator.
Your project seems to suggest darn-near exactly this idea: break bigger instructions down into smaller ones... But, you've essentially created a very fast core processor, and translation-layers to make it look like others, as opposed to my idea of slowing down already-slow monolithic processors by only using their shared/core features.
I'm having a hard time wording it, but seeing your reverse approach to what seems like the same concept has set the gears turning.
I can tell a lot of work went into this project. Nicely done.
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Thank you Eric !
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