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From: paul.winalski@gmail.com (Paul Winalski)
Subject: [TUHS] long lived programs
Date: Thu, 5 Apr 2018 19:23:18 -0400	[thread overview]
Message-ID: <CABH=_VSdcXn=R6GtkXth9yv2=rvYx=piRfS2bPfC+nYqZ5=1tA@mail.gmail.com> (raw)
In-Reply-To: <CAC20D2PfGSsv_EwxOHAmx=LrXwcdxMYSLUQ3mBX6bQ4RgtY20w@mail.gmail.com>

On 4/5/18, Clem Cole <clemc at ccc.com> wrote:
>
> Case folding I find funnier however. Back in the days of 5 and 6 bit codes,
> particularly when file names were stored in things like rad50 it made
> perfect sense.   The basic character code did not handle upper and lower
> well, and many keyboards were only one case anyway.   But by the time of
> the 8 bit byte, CP/M and it's child DOS, blindly follow along.  Instead of
> thinking why it was done and since we have a new file system format and
> thinking -- hmmm maybe we don't need to have the same limitation.
>
Maybe CP/M and DOS stored file names internally in rad50 or some other
compressed form, to save space?  The first PCs didn't have much memory
(64K), and floppies didn't have much capacity.  It was a throwback to
the "every bit counts" design and programming days of the 60s/early
70s.

-Paul W.


  parent reply	other threads:[~2018-04-05 23:23 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-05 21:03 Norman Wilson
2018-04-05 21:23 ` Clem Cole
2018-04-05 21:38   ` Bakul Shah
2018-04-06  2:03     ` Random832
2018-04-06  4:27       ` Warner Losh
2018-04-06  4:31         ` Jon Steinhart
2018-04-06  4:58         ` Steve Nickolas
2018-04-06  5:02           ` Jon Steinhart
2018-04-06  4:29       ` Steve Johnson
2018-04-06  5:57       ` Bakul Shah
2018-04-06 21:52         ` Peter Jeremy
2018-04-05 22:46   ` Arthur Krewat
2018-04-05 23:23   ` Paul Winalski [this message]
2018-04-05 23:33     ` Arthur Krewat
2018-04-06  0:05       ` Toby Thain
2018-04-06  4:51 ` Dave Horsfall
2018-04-06 15:00 ` Tony Finch
2018-04-07 20:41 ` Paul Winalski
  -- strict thread matches above, loose matches on Subject: below --
2018-04-06 22:33 Doug McIlroy
2018-04-07  1:01 ` Paul Winalski
2018-04-07  1:09   ` Larry McVoy
2018-03-23 18:27 [TUHS] long lived programs (was Re: RIP John Backus Bakul Shah
2018-03-23 20:50 ` [TUHS] long lived programs Steve Johnson
2018-03-23 21:07   ` Clem Cole
2018-03-23 15:51 Ron Natalie
2018-03-23 15:57 ` Clem Cole
2018-03-23 16:25   ` Lars Brinkhoff
2018-03-23 16:59     ` Lawrence Stewart
2018-03-23 17:31       ` Steve Nickolas
2018-03-23 16:32   ` Ron Natalie

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