[chbot] 8 bit discrete logic CPU update
markaren1 at xtra.co.nz
Tue Jul 4 18:30:59 BST 2017
Well done William !
On 5/07/2017 12:21 AM, william fleete wrote:
> I have finally received some working memory for my Ben Eater clone 8
> bit CPU and I have a video of it running its first bit of machine code
> which exercises a lot of the LEDs and most of the modules.
> Still a few hardware issues eg switching to halt can corrupt memory
> (writes the switches to a selected location) and when carry isn't on
> long enough the jump on (no) carry doesn't execute right or at all
> The IO card I made for it works, at least the TTL IO, you can input a
> value from user input to memory or the A or B register and the output
> is a duplicate of the output (display) register
> Link to the video https://youtu.be/LhoYCXn8XP4
> Might eventually get it fully 8 bit with 256 bytes memory
> I shall show it off more next meeting
> Sent from my iPad
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