How hard is to build a processor?
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From: Joe Pfeiffer on 25 Feb 2010 18:43 Cool! Over on alt.folklore.computers there was a recent thread about projects implementing old CPUs with an FPGA. Very neat stuff out there for the retrocomputing world. -- As we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours; and this we should do freely and generously. (Benjamin Franklin)
From: James Harris on 26 Feb 2010 05:52 On 25 Feb, 22:24, Jon Kirwan <j...(a)infinitefactors.org> wrote: > On Fri, 26 Feb 2010 08:57:31 +1100, Don McKenzie <5...(a)2.5A> > wrote: > > > > >It seems that Google engineer Bill Buzbee isn t interested in > >microprocessors that can be purchased in marked. There is more fun to > >build own. .... > Thanks, Don. I absolutely LOVE doing this kind of thing. It > should be required work for anyone in embedded programming, > at least. That reminds me that there are some excellent course videos by David Culler of Berkeley showing how to build a CPU from logic gates. A bit of searching for his webcasts for course 61CL Fall 2009 in H.264 video should bring them up. I had no idea until working through the lectures that *I* could build a CPU using components I already knew about. As part of the course he shows how to do so by working up from logic gates. James
From: Ian Bell on 26 Feb 2010 06:16 petrus bitbyter wrote: > "Don McKenzie" <5V(a)2.5A> schreef in bericht > news:7uoa2jF5dnU1(a)mid.individual.net... >> It seems that �Google� engineer Bill Buzbee isn�t interested in >> microprocessors that can be purchased in marked. There is more fun to >> build own. Several years ago he built first �Magic-1� processors >> , but now he makes its documentations widely available in his project >> website. >> >> http://www.embedds.com/how-hard-is-to-build-a-processor/ >> >> >> Cheers Don... >> >> >> -- >> Don McKenzie >> >> Site Map: http://www.dontronics.com/sitemap >> E-Mail Contact Page: http://www.dontronics.com/email >> Web Camera Page: http://www.dontronics.com/webcam >> No More Damn Spam: http://www.dontronics.com/spam >> >> Product Sellout: 15% OFF 4DSystems OLED Displays & modules. >> http://www.dontronics-shop.com/micro-oled.html > > > Back in '74 Elektor published a design of a computer built with TTL-logic. > They really made it work though I doubt any subscriber built it too. > > petrus bitbyter > > Back in '73 I worked on a 16 bit mini computer built entirely out of TTL, complete with a row of toggle switches on the front panel so you could enter machine code by hand. It had a paper tape reader and along with a paper tape punch you could use the two pass assembler - that's a lot of paper. Cheers ian
From: Mark Harriss on 26 Feb 2010 07:25 >Tim Watts wrote: > > I knew a chap (York University Computing Services) who claimed to have a > mate who built an elementary CPU from fruit machine relays[1]. Occupied a > bit of board about one square yard. He lost interest in building RAM from > more relays, so wedged a 1k RAM chip with suitable interfacing on the side. > Ran at about 1 IPS apparently... > > [1] he got a box load from a surplus store, old stripped out ones. Had an > unusual contact configuration that made them quite suitable. > Here's one built by a guy named Harry Porter: http://www.youtube.com/watch?v=n3wPBcmSb2U
From: Walter Banks on 26 Feb 2010 10:10
Don McKenzie wrote: > It seems that �Google� engineer Bill Buzbee isn�t interested in > microprocessors that can be purchased in marked. There is more fun to > build own. Several years ago he built first �Magic-1� processors > , but now he makes its documentations widely available in his project > website. > > http://www.embedds.com/how-hard-is-to-build-a-processor/ It is a lost art. In the 70's I taught a course that students built a small computer out of lab modules of TTL chip's. My first personal computer was micro coded PDP-8 hand built. Ram was 1K (bits) parts on a wirewrap board. Walter.. |