Groups > alt.folklore.computers > #235533

Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator]

From	Kragen Javier Sitaker <kragen@canonical.org>
Newsgroups	alt.folklore.computers
Subject	Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator]
Date	2026-09-05 10:14 -0300
Organization	Primarily biological and memetic
Message-ID	<87ik4j6dt2.fsf@debian> (permalink)
References	(4 earlier) <116hu7n$32c3b$2@toylet.eternal-september.org> <%X0jS.2$XsQ3.0@fx01.ams4> <116j56b$3eghm$1@toylet.eternal-september.org> <Cp9jS.718071$DOD1.590862@fx17.ams4> <mddo6eqyn0w.fsf_-_@panix5.panix.com>

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Rich Alderson <news@alderson.users.panix.com> writes:
> Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> writes:
>> Yes, we have to wonder what's in a name.  If I remember correctly, the
>> FAT [1] file system has separate entries for the /filename part/ and the
>> /extension part/.  
>
> On disk, user file directories are made up of pairs of 36 bit words.
> The first word contains the SIXBIT (ASCII values reduced by 40(8))
> name, up to 6 characters, and the second word contains the SIXBIT
> extension in the left halfword and a pointer to the first block of the
> file in the right halfword.

I have this vague memory suggesting that RT-11 and RSX-11 suffered from
the same 6.3 FILNAM.EXT limitation, though using RADIX-50 instead of
SIXBIT.  Was CP/M the system responsible for extending that to 8.3?

I don’t think anybody ever shipped a filesystem that tried to use
Baudot-Murray code for filenames...

Kragen

Thread

Re: Origin Of Filename Extension Dot Separator anthk@not.dev.null - 2026-08-17 23:57 +0200
  Re: Origin Of Filename Extension Dot Separator John Levine <johnl@taugh.com> - 2026-08-18 00:07 +0000
    Re: Origin Of Filename Extension Dot Separator Bob Eager <throwaway0008@eager.cx> - 2026-08-18 11:51 +0000
      Re: Origin Of Filename Extension Dot Separator Rich Alderson <news@alderson.users.panix.com> - 2026-08-18 22:15 -0400
    Re: Origin Of Filename Extension Dot Separator Rich Alderson <news@alderson.users.panix.com> - 2026-08-18 22:13 -0400
  Re: Origin Of Filename Extension Dot Separator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-23 07:32 +0000
    Re: Origin Of Filename Extension Dot Separator Peter Flass <Peter@Iron-Spring.com> - 2026-08-23 07:40 -0700
      Re: Origin Of Filename Extension Dot Separator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-23 22:07 +0000
        Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-24 07:27 +0800
          Re: Origin Of Filename Extension Dot Separator vallor <vallor@vallor.earth> - 2026-08-24 01:31 +0000
            Re: Origin Of Filename Extension Dot Separator Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-08-25 15:02 -0400
    Re: Origin Of Filename Extension Dot Separator Rich Alderson <news@alderson.users.panix.com> - 2026-08-23 23:36 -0400
  Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-23 23:13 +0800
    Re: Origin Of Filename Extension Dot Separator Lars Poulsen <lars@beagle-ears.com> - 2026-08-23 11:20 -0700
      Re: Origin Of Filename Extension Dot Separator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-23 22:11 +0000
        Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-24 07:28 +0800
        Re: Origin Of Filename Extension Dot Separator Rich Alderson <news@alderson.users.panix.com> - 2026-08-23 23:39 -0400
      Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-25 01:15 +0800
        Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-25 03:28 +0800
          Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-25 12:20 +0800
            Re: Origin Of Filename Extension Dot Separator John Levine <johnl@taugh.com> - 2026-08-25 15:34 +0000
              Re: Origin Of Filename Extension Dot Separator John Ames <commodorejohn@gmail.com> - 2026-08-25 09:35 -0700
                Re: Origin Of Filename Extension Dot Separator scott@slp53.sl.home (Scott Lurndal) - 2026-08-25 17:00 +0000
                Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-28 20:07 +0800
                Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-29 16:59 +0800
                Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 04:13 +0800
              Re: Origin Of Filename Extension Dot Separator Snidely <snidely.too@gmail.com> - 2026-08-25 11:22 -0700
                Re: Origin Of Filename Extension Dot Separator Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-08-25 21:43 +0000
                Re: Origin Of Filename Extension Dot Separator scott@slp53.sl.home (Scott Lurndal) - 2026-08-26 15:34 +0000
                Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-29 17:08 +0800
              Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-28 20:12 +0800
                Re: Origin Of Filename Extension Dot Separator John Levine <johnl@taugh.com> - 2026-08-28 18:14 +0000
                Re: Origin Of Filename Extension Dot Separator Rich Alderson <news@alderson.users.panix.com> - 2026-08-28 21:02 -0400
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-29 10:15 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-29 11:55 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-29 17:38 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 04:09 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? Rich Alderson <news@alderson.users.panix.com> - 2026-08-29 18:31 -0400
                Re: Origin Of Filename ... text and civilization? doomsday? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-30 11:33 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? John Ames <commodorejohn@gmail.com> - 2026-08-31 09:34 -0700
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-09-02 22:59 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? John Ames <commodorejohn@gmail.com> - 2026-09-02 08:29 -0700
                Re: Origin Of Filename ... text and civilization? doomsday? Peter Flass <Peter@Iron-Spring.com> - 2026-09-02 12:36 -0700
                Re: Origin Of Filename ... text and civilization? doomsday? John Ames <commodorejohn@gmail.com> - 2026-09-02 13:00 -0700
                Re: Origin Of Filename ... Babylon cuneiforms etched on bread? Exorcism? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-09-04 12:24 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-02 21:55 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-03 04:44 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-03 04:57 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-03 05:29 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-03 06:57 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-03 10:06 +0000
                The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-03 18:29 +0800
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) John Ames <commodorejohn@gmail.com> - 2026-09-03 08:02 -0700
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) athel.cb@gmail.com <user12588@newsgrouper.org.invalid> - 2026-09-03 15:49 +0000
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) Tony Cooper <tonycooper214@gmail.com> - 2026-09-03 14:08 -0400
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) John Ames <commodorejohn@gmail.com> - 2026-09-03 11:34 -0700
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) Tony Cooper <tonycooper214@gmail.com> - 2026-09-03 18:01 -0400
                Re: The Amarna Letters, Hebrew -- wait, which brew? Peter Flass <Peter@Iron-Spring.com> - 2026-09-03 15:26 -0700
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) Steve Hayes <hayesstw@telkomsa.net> - 2026-09-04 04:51 +0200
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-04 04:27 +0000
                Re: The Amarna Letters, Hebrew -- wait, which brew? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-04 12:52 +0800
                Re: The Amarna Letters, Hebrew -- wait, which brew? John Ames <commodorejohn@gmail.com> - 2026-09-04 08:15 -0700
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) Steve Hayes <hayesstw@telkomsa.net> - 2026-09-05 06:05 +0200
                Re: The Amarna Letters, Hebrew -- wait, which brew? (was: Re: Origin Of Filename ... text and civilization? doomsday?) James Dow Allen <user4353@newsgrouper.org.invalid> - 2026-09-05 09:13 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-05 21:09 +0000
                Re: The Amarna Letters, Hebrew -- wait, which brew? Malcolm Purvis <malcolm@purvis.id.au> - 2026-09-04 06:49 +1000
                Re: The Amarna Letters, Hebrew -- wait, which brew? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-03 21:27 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? Peter Flass <Peter@Iron-Spring.com> - 2026-09-03 08:28 -0700
                Re: Origin Of Filename ... text and civilization? doomsday? Rich Alderson <news@alderson.users.panix.com> - 2026-09-02 15:37 -0400
                Re: Origin Of Filename ... text and civilization? doomsday? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-29 05:25 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-29 13:35 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-29 17:35 +0000
                Re: Origin Of Filename ... text and civilization? doomsday? Chris Ahlstrom <OFeem1987@teleworm.us> - 2026-08-29 15:42 -0400
                Re: Origin Of Filename ... text and civilization? doomsday? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-29 21:07 +0000
                Re: Origin Of .... "say what?" "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 18:00 +0800
                Re: Origin Of Filename ... text and civilization? doomsday? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 04:17 +0800
                Re: Origin Of Filename Extension Dot Separator Charles Hope <clh@candehope.me.uk> - 2026-08-29 09:45 +0000
                Re: Origin Of Filename Extension Dot Separator Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-29 17:14 +0800
                Re: Origin Of Filename Extension Dot Separator "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 03:52 +0800
                Re: Origin Of ..... Darklands the video game? Medieval Europe? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 04:24 +0800
                Re: Origin Of ..... Darklands & the Holy Roman Empire? 15th century?? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-08-30 16:47 +0800
                Re: Origin Of ..... Darklands the video game? Medieval Europe? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-08-31 17:08 +0800
                Re: Origin Of ..... Darklands the video game? Medieval Europe? "Kerr-Mudd, John" <admin@127.0.0.1> - 2026-08-31 16:40 +0100
                Re: Origin Of ..... Darklands the video game? Medieval Europe? Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-09-03 00:06 +0800
                Re: Origin Of ..... Darklands the video game? Medieval Europe? "Mr. Chang Man-wai" <toylet.toylet@gmail.com> - 2026-09-02 23:02 +0800
             Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] Rich Alderson <news@alderson.users.panix.com> - 2026-08-25 16:15 -0400
              Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] Kragen Javier Sitaker <kragen@canonical.org> - 2026-09-05 10:14 -0300
                Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-05 21:11 +0000

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