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- Newsgroups: comp.arch
- Path: sparky!uunet!ukma!styer
- From: styer@ms.uky.edu (Eugene F. Styer)
- Subject: Re: 600 transistor CPU (was: MINIMUM instruction set)
- References: <1992Nov10.235849.19192@fcom.cc.utah.edu>
- <1992Nov11.144304.10494@news.uiowa.edu>
- <1992Nov12.164510.28248@dartvax.dartmouth.edu>
- Message-ID: <1992Nov13.105238.10552@ms.uky.edu>
- Date: Fri, 13 Nov 1992 15:52:38 GMT
- Organization: University Of Kentucky, Dept. of Math Sciences
- Lines: 30
-
- In article <1992Nov12.164510.28248@dartvax.dartmouth.edu> stevel@coos.dartmouth.edu (Steve Ligett) writes:
- >Somewhere I have a copy of an article (or two) titled
- >
- >"A design for a 16 bit processor using only 600 transistors"
- >
- >from Microelectronics Journal, Vol 15, Nr 3,
- >copyright 1984 Benn Electronics Publications Ltd, London
- >
- >The machine has 4 instructions: three subtracts, and one bit clear.
- >
- >I'll try to find and reread the articles if it would be of interest.
- >--
- >steve.ligett@dartmouth.edu
- >Sign in our Machine Room: Before Leaving Please Lock Door Behind You
-
- I don't have that article any more (at least where I can find it), but I do
- remember it. I decided that if his goal was a small CPU to watch over things,
- he would do better to have (say) 8 instructions and include load, store, etc.
- My conclusion was that the additional size of the processor (I estimated 1000-
- 1200 transistors) would be more than balanced by the smaller programs required
- (1/2 or smaller) for programs as small as a few hundred instructions. If his
- goal was the fewest number of instructions, then other posts have indicated he
- has 3 too many instructions. All in all, it was an attempt to be more practical
- than most of the minimal-instruction systems.
-
- Eugene Styer - 402 Wallace, EKU, Richmond, KY 40475 matstyer@eku.bitnet
- "And to think I had a nice, safe career going for me putting mafiosi in jail"
- --
- Eugene Styer - 402 Wallace, EKU, Richmond, KY 40475 matstyer@eku.bitnet
- "And to think I had a nice, safe career going for me putting mafiosi in jail"
-