From: Robert A Duff <bobduff@world.std.com>
Subject: Re: Streams in Ada
Date: Fri, 13 Apr 2001 23:21:59 GMT
Date: 2001-04-13T23:21:59+00:00 [thread overview]
Message-ID: <wcc7l0ocrmw.fsf@world.std.com> (raw)
In-Reply-To: 5FW3+dkM46AZ@eisner.encompasserve.org
Kilgallen@eisner.decus.org.nospam (Larry Kilgallen) writes:
> In article <wccg0frw5se.fsf@world.std.com>, Robert A Duff <bobduff@world.std.com> writes:
> > "Marin David Condic" <marin.condic.auntie.spam@pacemicro.com> writes:
> >
> >> The PDP-10 was more closely oriented to "Sixbit" characters. (Or
> >> "Half-ASCII" - basically ASCII with the lower case & some other stuff gone.)
> >> IIRC, the Tops-10 OS had the 6x3 file name restrictions basically because it
> >> would make filenames fit with Sixbit & into even multiples of machine words.
> >
> > This is more a property of Tops-10 than the PDP-10 hardware.
> >
> > The hardware supported "bytes", which could be from 1 to 36 bits each --
> > there's nothing special about 6-bit bytes.
>
> 6-bit bytes were adequate to meet the needs of the time.
> As I recall, ITS (Incompatible Timesharing System), which
> predated Tops-10, used 6x6 filenames.
You seem to be implying that "bytes" are always used to represent
"characters". On the PDP-10, 6-bit bytes were used to represent 6-bit
characters, and 7-bit bytes were used to represent 7-bit ASCII, and
1-bit bytes were used to represent booleans, and 3-bit bytes were used
to represent enumeration types with 8 values, and so on.
- Bob
next prev parent reply other threads:[~2001-04-13 23:21 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-31 14:49 Streams in Ada chris.danx
2001-03-31 15:22 ` chris.danx
2001-03-31 21:37 ` Jeff Creem
2001-03-31 21:49 ` chris.danx
2001-03-31 22:21 ` Robert A Duff
2001-03-31 22:33 ` chris.danx
2001-04-02 13:47 ` Ted Dennison
2001-04-02 14:03 ` Florian Weimer
2001-04-02 14:29 ` Ted Dennison
2001-04-02 14:54 ` Robert A Duff
2001-04-02 14:47 ` Marin David Condic
2001-04-02 15:10 ` Florian Weimer
2001-04-02 15:49 ` Ted Dennison
2001-04-02 16:57 ` Marin David Condic
2001-04-02 17:43 ` PDP-10, was " tmoran
2001-04-02 17:49 ` Robert A Duff
2001-04-02 22:09 ` 6-bit characters (was: Re: Streams in Ada) Jeffrey Carter
2001-04-02 23:29 ` Robert A Duff
2001-04-03 16:41 ` Jeffrey Carter
2001-04-03 17:57 ` Florian Weimer
2001-04-03 18:19 ` Marin David Condic
2001-04-05 18:37 ` Tucker Taft
2001-04-03 18:04 ` Marin David Condic
2001-04-06 22:40 ` Robert A Duff
2001-04-03 14:10 ` Marin David Condic
2001-04-03 1:57 ` Streams in Ada Larry Kilgallen
2001-04-03 14:13 ` Marin David Condic
2001-04-13 23:21 ` Robert A Duff [this message]
2001-04-02 17:41 ` Florian Weimer
2001-04-02 18:17 ` Robert A Duff
2001-04-02 19:36 ` Marin David Condic
2001-04-02 20:54 ` Robert A Duff
2001-04-03 10:10 ` Florian Weimer
2001-04-03 14:21 ` Marin David Condic
2001-04-03 18:15 ` Florian Weimer
2001-04-03 23:21 ` Robert A Duff
2001-04-02 21:13 ` Florian Weimer
2001-04-02 21:22 ` Robert A Duff
2001-04-03 10:02 ` Florian Weimer
2001-04-02 16:42 ` Marin David Condic
2001-04-13 5:00 ` David Thompson
2001-03-31 20:48 ` James Rogers
2001-03-31 21:20 ` chris.danx
2001-03-31 21:22 ` chris.danx
2001-03-31 23:10 ` David C. Hoos, Sr.
2001-04-01 11:27 ` chris.danx
2001-04-02 14:12 ` Ted Dennison
2001-04-02 14:00 ` Ted Dennison
-- strict thread matches above, loose matches on Subject: below --
2001-04-05 14:24 Brian Gaffney
2001-04-06 22:54 ` Robert A Duff
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox