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Groups > alt.folklore.computers > #212363
| From | Bob Eager <news0073@eager.cx> |
|---|---|
| Newsgroups | alt.folklore.computers |
| Subject | Re: Where do byte orders come from |
| Date | 2020-07-25 22:21 +0000 |
| Message-ID | <ho3pjiFmsnaU9@mid.individual.net> (permalink) |
| References | (7 earlier) <87r1t0kcq2.fsf@mothra.home> <7385ab1f-c41d-4f22-8969-7cfbe234b775o@googlegroups.com> <rfh36i$jsc$2@dont-email.me> <6b85ec58-7904-4e20-8e77-88adfec05933o@googlegroups.com> <117289487.617406095.513470.peter_flass-yahoo.com@news.eternal-september.org> |
On Sat, 25 Jul 2020 14:43:37 -0700, Peter Flass wrote: > Quadibloc <jsavard@ecn.ab.ca> wrote: >> On Saturday, July 25, 2020 at 4:57:23 AM UTC-6, Gareth Evans wrote: >>> On 25/07/2020 09:57, Quadibloc wrote: >> >>>> But you _are_ right that it is going too far to say that big-endian >>>> is "the way humans think of numbers". >> >>> The writing of numbers by humans has nothing whatsoever to do with the >>> internal operation of computers. >> >> Computers operate on character strings internally, and those character >> strings get sent to printers to produce text for humans to read. >> >>> But am I right in remembering that the PDP11 had a mix of Big and >>> Little Endian; the basic processor being Little but some of the >>> floating point options being Big? >> >> Yes. I think it was big-endian due to a lack of communication... as the >> PDP-11 was the first attempt to make a computer consistently >> little-endian, this was a novel and unfamiliar concept, and so if the >> team making the floating-point add- on didn't have that concept clearly >> and firmly explained to them, naturally they would just make the >> floating-point processor in the way they would assume to be right and >> natural and the same as every other computer used. > > I thought I read somewhere that FP in the early -11s was originally > software only. (maybe from Bell?) Pretty sure our 11/20 didn't have it. As it happens, I've been doing a disassembler for the PDP-11 over the last couple of days. I identified the EIS floating point (four instructions, very simple) and the FP-11 floating point (lots of instructions, a bit arcane). -- Using UNIX since v6 (1975)... Use the BIG mirror service in the UK: http://www.mirrorservice.org
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Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-24 03:51 -0700
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-24 03:54 -0700
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-24 04:00 -0700
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-24 15:54 +0000
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-24 09:23 -0700
Re: Where do byte orders come from Gareth Evans <headstone255@yahoo.com> - 2020-07-24 17:28 +0100
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-24 09:56 -0700
Re: Where do byte orders come from Radey Shouman <shouman@comcast.net> - 2020-07-24 14:08 -0400
Re: Where do byte orders come from robin.vowels@gmail.com - 2020-07-24 17:54 -0700
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 01:57 -0700
Re: Where do byte orders come from Gareth Evans <headstone255@yahoo.com> - 2020-07-25 11:57 +0100
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-25 17:23 +0000
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 11:39 -0700
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-25 14:43 -0700
Re: Where do byte orders come from Bob Eager <news0073@eager.cx> - 2020-07-25 22:21 +0000
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-25 22:49 +0000
Re: Where does PDP-11 floating point come from John Levine <johnl@taugh.com> - 2020-07-25 22:34 +0000
Re: Where do byte orders come from Radey Shouman <shouman@comcast.net> - 2020-07-25 14:38 -0400
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 11:42 -0700
Re: Where do byte orders come from Radey Shouman <shouman@comcast.net> - 2020-07-26 17:11 -0400
Re: Where do byte orders come from Radey Shouman <shouman@comcast.net> - 2020-07-26 17:13 -0400
Re: Where do byte orders come from Radey Shouman <shouman@comcast.net> - 2020-07-26 17:15 -0400
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-26 16:22 -0700
Re: Where do byte orders come from Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-27 06:35 +0100
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-27 11:42 -0700
Re: Where do byte orders come from JimP <solosam90@gmail.com> - 2020-07-27 13:54 -0500
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-27 00:37 -0700
Re: Where do byte orders come from Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-27 09:05 +0100
Re: Where do byte orders come from "Kerr-Mudd,John" <notsaying@127.0.0.1> - 2020-07-27 11:27 +0000
Re: Where do byte orders come from JimP <solosam90@gmail.com> - 2020-07-27 10:27 -0500
Re: Where do byte orders come from Rich Alderson <news@alderson.users.panix.com> - 2020-07-27 20:45 -0400
Re: Where do byte orders come from JimP <solosam90@gmail.com> - 2020-07-28 09:24 -0500
Re: Where do byte orders come from Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-07-28 17:30 +0000
Re: Where do byte orders come from JimP <chucktheouch@gmail.com> - 2020-07-28 15:56 -0500
Re: Where do byte orders come from Andy Walker <anw@cuboid.co.uk> - 2020-07-27 22:34 +0100
Re: Where do byte orders come from Andreas Eder <a_eder_muc@web.de> - 2020-08-02 12:00 +0200
Re: Where do byte orders come from JimP <chucktheouch@gmail.com> - 2020-08-02 14:02 -0500
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-08-02 15:03 -0700
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-08-02 22:59 +0000
Re: Where do byte orders come from Thomas Koenig <tkoenig@netcologne.de> - 2020-08-03 06:57 +0000
Re: Where do byte orders come from maus <maus@dmaus.org> - 2020-08-08 22:21 +0000
Re: Where do byte orders come from Rich Alderson <news@alderson.users.panix.com> - 2020-08-09 16:50 -0400
Re: Where do byte orders come from maus <maus@dmaus.org> - 2020-08-10 23:07 +0000
Re: Where do byte orders come from J. Clarke <jclarke.873638@gmail.com> - 2020-08-10 19:14 -0400
Re: How did byte order get to horses? Dan Espen <dan1espen@gmail.com> - 2020-08-10 20:39 -0400
Re: How did byte order get to horses? J. Clarke <jclarke.873638@gmail.com> - 2020-08-10 20:51 -0400
Re: How did byte order get to horses? Dan Espen <dan1espen@gmail.com> - 2020-08-10 22:38 -0400
Re: How did byte order get to horses? J. Clarke <jclarke.873638@gmail.com> - 2020-08-10 22:50 -0400
Re: How did byte order get to horses? robin.vowels@gmail.com - 2020-08-10 20:35 -0700
Re: Where do byte orders come from Mike Spencer <mds@bogus.nodomain.nowhere> - 2020-08-11 03:42 -0300
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-08-03 07:45 -0700
Re: Where do byte orders come from JimP <chucktheouch@gmail.com> - 2020-08-03 13:45 -0500
Re: Where do byte orders come from Rich Alderson <news@alderson.users.panix.com> - 2020-08-06 23:47 -0400
Re: Where do byte orders come from Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-08-02 21:58 +0000
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-08-02 15:04 -0700
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-25 14:43 -0700
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-25 22:35 +0000
Re: Where do byte orders come from Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2020-07-25 16:54 -0600
Re: Where do byte orders come from Gareth Evans <headstone255@yahoo.com> - 2020-07-26 09:43 +0100
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-26 05:54 -0700
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 02:03 -0700
Re: Where do byte orders come from Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-25 10:54 +0100
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-25 17:25 +0000
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-24 10:32 -0700
Re: Where do byte orders come from Peter Flass <peter_flass@yahoo.com> - 2020-07-24 11:45 -0700
Re: Where do byte orders come from scott@slp53.sl.home (Scott Lurndal) - 2020-07-24 19:32 +0000
Re: Where do byte orders come from Richard Milward <rsmilward@gmail.com> - 2020-10-07 12:45 -0700
Re: Where do byte orders come from Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-24 20:54 +0100
Re: Where do byte orders come from Quadibloc <jsavard@ecn.ab.ca> - 2020-07-25 01:55 -0700
Re: Where do byte orders come from Dan Espen <dan1espen@gmail.com> - 2020-07-24 16:40 -0400
Re: Where do byte orders come from John Levine <johnl@taugh.com> - 2020-07-24 19:30 +0000
Re: Where do byte orders come from Ahem A Rivet's Shot <steveo@eircom.net> - 2020-07-24 21:06 +0100
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