Last visit was: Tue May 17, 2022 1:38 pm
It is currently Tue May 17, 2022 1:38 pm

 [ 1 post ] 
 4-bit machine made from discretes 
Author Message

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1690
The computer is perpetually half done (it could be more it could be less, I only design the logic for the chunk I'm working on) but currently consists of about 300 transistors. I'm pretty sure that the computer follows 'Harvard architecture' (corrections welcome) as the RAM and ROM are strictly segregated. 4 bit is used loosely data width is 4 bits but instruction width is 8 bits as some instructions include 4 bit values.

some stats:
RAM: 16 nybbles (dictated by address register width)
ROM: 16 bytes (dictated by program counter width)
clock speed: more than one (the computer is currently not clocked as much of the sequential logic has yet to be built)

See the website at ... ransistors

via ... ransistors

From the comments, here's a video series about building an 8bit machine on a breadboard using TTL: ... Tfp0DV1z5H

Mon Nov 24, 2014 3:22 pm
 [ 1 post ] 

Who is online

Users browsing this forum: Bing [Bot], CCBot and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software