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Groups > alt.folklore.computers > #235321 > unrolled thread
| Started by | anthk@not.dev.null |
|---|---|
| First post | 2026-08-17 23:57 +0200 |
| Last post | 2026-09-05 21:11 +0000 |
| Articles | 8 on this page of 88 — 23 participants |
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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
Page 5 of 5 — ← Prev page 1 2 3 4 [5]
| From | "Mr. Chang Man-wai" <toylet.toylet@gmail.com> |
|---|---|
| Date | 2026-08-30 16:47 +0800 |
| Subject | Re: Origin Of ..... Darklands & the Holy Roman Empire? 15th century?? |
| Message-ID | <1170qnu$3tpq6$1@toylet.eternal-september.org> |
| In reply to | #235462 |
On 8/30/2026 4:24 AM, Mr. Chang Man-wai wrote:
>
> Darklands (video game) - Wikipedia
> https://en.wikipedia.org/wiki/Darklands_(video_game)
>
> "The setting for Darklands is medieval Europe. All of the cities that
> one's party may visit in the game are real places that existed in the
> Holy Roman Empire of the 15th century.....
So this video game is to bring back the Dark
Age to Europe by destroying the Holy Roman
Empire before it's established?
Holy Roman Empire - Wikipedia
<https://en.wikipedia.org/wiki/Holy_Roman_Empire>
Discovery of the tomb of Tutankhamun - Wikipedia
<https://en.wikipedia.org/wiki/Discovery_of_the_tomb_of_Tutankhamun>
--
@~@ Simplicity is Beauty! Remain silent! Drink, Blink, Stretch!
/ v \ May the Force and farces be with you! Live long and prosper!!
/( _ )\ https://sites.google.com/site/changmw/
^ ^ https://github.com/changmw/changmw
The game is afoot... Meow...
[toc] | [prev] | [next] | [standalone]
| From | Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> |
|---|---|
| Date | 2026-08-31 17:08 +0800 |
| Subject | Re: Origin Of ..... Darklands the video game? Medieval Europe? |
| Message-ID | <6wblS.187658$e_1.73200@fx18.ams4> |
| In reply to | #235462 |
On 30/08/2026 4:24 AM, Mr. Chang Man-wai wrote: > On 8/29/2026 5:14 PM, Johann 'Myrkraverk' Oskarsson wrote: > >> >> It was a minor annoyance that I had to choose to boot into Windows >> for /office applications/, and not for the Darklands graphical appli- >> cation, but learned to live with the decision at boot time. > Why are you so obsessed with Darklands? > > It's NOT exactly a "graphical application", > but just a game, a role-playing game. > > Seems that you wanna travel back in time > to medieval Europe for some unknown reasons. > Is it because you have some unfinished > business back then? Well, as it turns out, I was never very good at Darklands as a teenager, I guess the complexity of a role playing game got me, and I gave up on playing. I have now re-acquired the game on GOG, and will hopefully go through the story of /Medieval Germany/ all over again sometime in the near future. So my /unfinished business/ is less Germany, and more the game. After all, why have DOS compatible computers if we can't game on them? Have a nice day playing Darklands! -- Johann | email: invalid -> com | http://www.myrkraverk.com/blog/ I'm not from the Internet, I just work there. | via Easynews.com https://bsky.app/profile/myrkraverk.bsky.social | for ( ;; ) _:;
[toc] | [prev] | [next] | [standalone]
| From | "Kerr-Mudd, John" <admin@127.0.0.1> |
|---|---|
| Date | 2026-08-31 16:40 +0100 |
| Subject | Re: Origin Of ..... Darklands the video game? Medieval Europe? |
| Message-ID | <20260831164022.1f895e8875f5a067abce9193@127.0.0.1> |
| In reply to | #235489 |
On Mon, 31 Aug 2026 17:08:17 +0800 Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> wrote: > On 30/08/2026 4:24 AM, Mr. Chang Man-wai wrote: > > On 8/29/2026 5:14 PM, Johann 'Myrkraverk' Oskarsson wrote: > > > >> > >> It was a minor annoyance that I had to choose to boot into Windows > >> for /office applications/, and not for the Darklands graphical appli- > >> cation, but learned to live with the decision at boot time. > > Why are you so obsessed with Darklands? > > > > It's NOT exactly a "graphical application", > > but just a game, a role-playing game. > > > > Seems that you wanna travel back in time > > to medieval Europe for some unknown reasons. > > Is it because you have some unfinished > > business back then? > > Well, as it turns out, I was never very good at Darklands as a teenager, > I guess the complexity of a role playing game got me, and I gave up on > playing. I have now re-acquired the game on GOG, and will hopefully go > through the story of /Medieval Germany/ all over again sometime in the > near future. > > So my /unfinished business/ is less Germany, and more the game. After > all, why have DOS compatible computers if we can't game on them? > > > Have a nice day playing Darklands!too many weird xposts for DOS choose Duke3d. (eduke32 for windows) Fu dropped all but afc -- Bah, and indeed Humbug.
[toc] | [prev] | [next] | [standalone]
| From | Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> |
|---|---|
| Date | 2026-09-03 00:06 +0800 |
| Subject | Re: Origin Of ..... Darklands the video game? Medieval Europe? |
| Message-ID | <eQXlS.86$9H1.56@fx01.ams4> |
| In reply to | #235494 |
On 31/08/2026 11:40 PM, Kerr-Mudd, John wrote: > On Mon, 31 Aug 2026 17:08:17 +0800 > Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> wrote: > >> On 30/08/2026 4:24 AM, Mr. Chang Man-wai wrote: >>> On 8/29/2026 5:14 PM, Johann 'Myrkraverk' Oskarsson wrote: >>> >>>> >>>> It was a minor annoyance that I had to choose to boot into Windows >>>> for /office applications/, and not for the Darklands graphical appli- >>>> cation, but learned to live with the decision at boot time. >>> Why are you so obsessed with Darklands? >>> >>> It's NOT exactly a "graphical application", >>> but just a game, a role-playing game. >>> >>> Seems that you wanna travel back in time >>> to medieval Europe for some unknown reasons. >>> Is it because you have some unfinished >>> business back then? >> >> Well, as it turns out, I was never very good at Darklands as a teenager, >> I guess the complexity of a role playing game got me, and I gave up on >> playing. I have now re-acquired the game on GOG, and will hopefully go >> through the story of /Medieval Germany/ all over again sometime in the >> near future. >> >> So my /unfinished business/ is less Germany, and more the game. After >> all, why have DOS compatible computers if we can't game on them? >> >> >> Have a nice day playing Darklands!too many weird xposts > > for DOS choose Duke3d. (eduke32 for windows) Dear Kerr-Mudd, John, Thank you for the recommendation. I'll add it to my list of first person shooters sometime after playing through what I have of the Hexen series. I never got around to it back in the day, and I'm still in no hurry. After all, good games are good games. > > Fu dropped all but afc > That's fine. We can add more news groups as the discussion digresses. Best wishes, and happy D.O.S. gaming! -- Johann | email: invalid -> com | http://www.myrkraverk.com/blog/ I'm not from the Internet, I just work there. | via Easynews.com https://bsky.app/profile/myrkraverk.bsky.social | for ( ;; ) _:;
[toc] | [prev] | [next] | [standalone]
| From | "Mr. Chang Man-wai" <toylet.toylet@gmail.com> |
|---|---|
| Date | 2026-09-02 23:02 +0800 |
| Subject | Re: Origin Of ..... Darklands the video game? Medieval Europe? |
| Message-ID | <1179dp9$2srgb$3@toylet.eternal-september.org> |
| In reply to | #235489 |
On 8/31/2026 5:08 PM, Johann 'Myrkraverk' Oskarsson wrote:
>
> Well, as it turns out, I was never very good at Darklands as a teenager,
> I guess the complexity of a role playing game got me, and I gave up on
> playing. I have now re-acquired the game on GOG, and will hopefully go
> through the story of /Medieval Germany/ all over again sometime in the
> near future.
>
> So my /unfinished business/ is less Germany, and more the game. After
> all, why have DOS compatible computers if we can't game on them?
>
> Have a nice day playing Darklands!
You can play old DOS games online over
just a browser! IN fact, you can play
ALL old DOS games online.
online dos game darklands - Google 搜尋
<https://www.google.com/search?q=online+dos+game+darklands>
--
@~@ Simplicity is Beauty! Remain silent! Drink, Blink, Stretch!
/ v \ May the Force and farces be with you! Live long and prosper!!
/( _ )\ https://sites.google.com/site/changmw/
^ ^ https://github.com/changmw/changmw
The game is afoot... Meow...
[toc] | [prev] | [next] | [standalone]
| From | Rich Alderson <news@alderson.users.panix.com> |
|---|---|
| Date | 2026-08-25 16:15 -0400 |
| Subject | Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] |
| Message-ID | <mddo6eqyn0w.fsf_-_@panix5.panix.com> |
| In reply to | #235361 |
Newsgroups appropriately trimmed.
Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> writes:
> On 25/08/2026 12:20 PM, Mr. Chang Man-wai wrote:
>> On 8/25/2026 3:28 AM, Johann 'Myrkraverk' Oskarsson wrote:
>>> This one is easy. You put the letter in an envelope, then put a name
>>> one the envelope. Then you put the same name on a credit card sized
>>> /index card/, and put the index card in the drawer that has the same
>>> first letter as the name you put on the envelope in the first place.
>> That's just a library trick
>> But in the naming method,
>> which is the file name?
>> Which is the file name extension? :)
> 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/. And even if FAT doesn't have it, we can still imagine
> a file system that does.
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. File attributes
such as protection, write date, etc., are stored in that first block.
On DECtape, things are a little different.
1. The directory block is block 100(10) = 144(8) on the tape (out of a total of
578(10) blocks).
2. The first 83 words of the directory are broken into 5 bit bytes, with each
byte containing the file number (1 through 22(10)) to which that tape block
belongs.
3. The next 22 words contain the SIXBIT name of the file, up to six characters.
4. The next 22 words contain the SIXBIT extension, up to three characters, in the
left halfword, six 0 bits, and the file creation date (low order 12 bits).
5. The last word contains a tape label, the SIXBIT name of the tape.
The date format led to the DATE75 problem, because only 11 years (from the epoch
date of 1 January 1964) could be represented. A revised date model stored 3 high
order bits of date in the unused bits 35 of the first 83 words, interleaved by 22
(that is, file 1's high order bits were in words 0, 22, and 44, and so on).
The 83 words can represent more blocks than exist in 22 files. Blocks are
reserved to a boot program, and get a "file number" of 36(8); blocks beyond 577 in
word 83 get a file number of 37(8).
--
Rich Alderson news@alderson.users.panix.com
Audendum est, et veritas investiganda; quam etiamsi non assequamur,
omnino tamen proprius, quam nunc sumus, ad eam perveniemus.
--Galen
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| From | Kragen Javier Sitaker <kragen@canonical.org> |
|---|---|
| Date | 2026-09-05 10:14 -0300 |
| Subject | Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] |
| Message-ID | <87ik4j6dt2.fsf@debian> |
| In reply to | #235375 |
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
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| From | Lawrence D’Oliveiro <ldo@nz.invalid> |
|---|---|
| Date | 2026-09-05 21:11 +0000 |
| Subject | Re: Tops-10 filename/extension representation [was Re: Origin Of Filename Extension Dot Separator] |
| Message-ID | <117i0hh$1rin0$2@dont-email.me> |
| In reply to | #235533 |
On Sat, 05 Sep 2026 10:14:01 -0300, Kragen Javier Sitaker wrote: > 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. I think RSX-11 allowed 9.3 names. I think the PDP-8 had an earlier operating system called OS/8 that only allowed 2 characters for the extension. > Was CP/M the system responsible for extending that to 8.3? Unix was already doing 14-character names before that.
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