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6502 Computer on a Breadboard!


JeffJetton

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Some of you might be familiar with Ben Eater. He famously posted a series of videos in which he built a basic, 8-bit computer from scratch using TTL components on a bunch of breadboards, clearly explaining the reasoning behind every step. (And when I say "from scratch", I mean he cobbled together the clock, the registers, the ALU... the whole shebang!)

 

Well now he's building a 6502-based computer. Not quite as far down to the bare metal as the previous project, I'd imagine, since he's using a microprocessor chip this time. But I suspect we'll wind up with more useful device when it's all done.

 

The first video in the series came out a few days ago, and it's fantastic:

 

 

(Most of us here will be able to guess why he used $EA for his data input value before he reveals the answer, of course. ? )

 

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  • 1 month later...

It's been a looooong wait, but part II is finally up! ?

 

In this one, he hooks the 6502 up to an EEPROM so it can actually execute a real sequence of instructions, and later adds another chip (a cousin of the Atari's RIOT, in turns out) to latch output data:

 

https://www.youtube.com/watch?v=yl8vPW5hydQ

 

I find this stuff really interesting, and it's giving me more insight on how the 2600 works.

 

Edited by JeffJetton
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