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| Subject | Re: What is the absolute smallest instruction set do you need to make a working computer? |
|---|---|
| Newsgroups | alt.comp.os.windows-10, alt.windows7.general, comp.sys.ibm.pc.hardware.chips, comp.sys.intel, alt.comp.hardware.amd.x86-64 |
| References | <O5KdnQkk04pyOhvAnZ2dnUU7-efNnZ2d@giganews.com> <20190921202740@news.eternal-september.org> <qm6ibe$pnm$1@news.mixmin.net> |
| From | Yousuf Khan <bbbl67@spammenot.yahoo.com> |
| Date | 2019-09-22 00:46 -0400 |
| Message-ID | <ap-dnUOrRe8QYRvAnZ2dnUU7-QfNnZ2d@giganews.com> (permalink) |
Cross-posted to 5 groups.
On 9/21/2019 9:21 PM, Arlen Holder wrote: > On Sun, 22 Sep 2019 00:49:48 -0000 (UTC), Roger Blake wrote: > >> Interesting. In terms of commercially-successful CPUs the most minimal >> I've worked with was the DEC PDP-8, which had 8 instructions (3-bit opcode). > > A nand gate can implement all Boolean operations, can't it? > :) And so the answer is, the only instruction you need is a Subtract instruction! A special subtract instruction that branches only when the result is less than or equal to zero. The video explains how that works. Yousuf Khan
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What is the absolute smallest instruction set do you need to make a working computer? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2019-09-21 18:45 -0400
Re: What is the absolute smallest instruction set do you need to make a working computer? Roger Blake <rogblake@iname.invalid> - 2019-09-22 00:49 +0000
Re: What is the absolute smallest instruction set do you need to make a working computer? Arlen Holder <arlen_h0ldr@arlinghlder.edu> - 2019-09-22 01:21 +0000
Re: What is the absolute smallest instruction set do you need to make a working computer? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2019-09-22 00:46 -0400
Re: What is the absolute smallest instruction set do you need to make a working computer? Jeff Barnett <jbb@notatt.com> - 2019-09-21 22:04 -0600
Re: What is the absolute smallest instruction set do you need to make a working computer? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2019-09-22 01:00 -0400
Re: What is the absolute smallest instruction set do you need to make a working computer? Jeff Barnett <jbb@notatt.com> - 2019-09-21 23:47 -0600
Re: What is the absolute smallest instruction set do you need to make a working computer? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2019-09-22 08:59 -0400
Re: What is the absolute smallest instruction set do you need to make a working computer? Jeff Barnett <jbb@notatt.com> - 2019-09-22 10:52 -0600
Re: What is the absolute smallest instruction set do you need to make a working computer? "J. P. Gilliver (John)" <G6JPG@255soft.uk> - 2019-09-22 21:07 +0100
Re: What is the absolute smallest instruction set do you need to make a working computer? VanguardLH <V@nguard.LH> - 2019-09-22 01:26 -0500
Re: What is the absolute smallest instruction set do you need to make a working computer? Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2019-09-22 10:25 -0400
Re: What is the absolute smallest instruction set do you need to make a working computer? pyotr filipivich <phamp@mindspring.com> - 2019-09-22 08:25 -0700
Re: What is the absolute smallest instruction set do you need to make a working computer? "J. P. Gilliver (John)" <G6JPG@255soft.uk> - 2019-09-22 21:15 +0100
Re: What is the absolute smallest instruction set do you need to make a working computer? pyotr filipivich <phamp@mindspring.com> - 2019-09-22 18:36 -0700
Re: What is the absolute smallest instruction set do you need to make a working computer? Rene Lamontagne <rlamont@shaw.ca> - 2019-09-22 22:31 -0500
Re: What is the absolute smallest instruction set do you need to make a working computer? pyotr filipivich <phamp@mindspring.com> - 2019-09-23 09:12 -0700
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