Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.linux.misc > #32914

Re: HA - Found a CP/M-86 image and C compiler for VBox

From Charlie Gibbs <cgibbs@kltpzyxm.invalid>
Newsgroups comp.os.linux.misc
Subject Re: HA - Found a CP/M-86 image and C compiler for VBox
Date 2021-08-27 02:01 +0000
Organization NewsGuy.com
Message-ID <sg9h1r012bn@news4.newsguy.com> (permalink)
References <1vGdnQotD_JChLr8nZ2dnUU7-L3NnZ2d@earthlink.com>

Show all headers | View raw

On 2021-08-26, SixOverFive <hae274b.net> wrote:

> Drifting around today I found a few interesting antiques
> on the net. One was DOS-6.22 ... and a Turbo Pascal 6
> compiler that ran on it. Also got the MS Fortran/Pascal/COBOL
> and BASCOM for it. Even more interesting, remember when the
> IBM-PCs first came out ? They came with TWO floppies -
> IBM-DOS and CP/M-86. The originals had CP/M 1.0 while the
> closely-following PC-XTs came with CP/M 1.10 ...
> got BOTH to run inside VirtualBox. Even found an ancient
> Aztec 'C' compiler that'll make CP/M executables AND
> the (rather extensive) manual.

Hmm, I have an unopened copy of CP/M-86 version 2.
I'll get it uploaded to Bitsavers someday.

> Note, CP/M was rather CRAPPY. It wasn't even usually
> safe to try and append to files because the OS didn't
> keep track of how many bytes were in play.

CP/M stored file sizes in 128-byte sectors.  That's why
that control-Z byte was introduced: so you could tell
when you've hit the exact end of a text file.  Most
CP/M software was smart enough to overwrite the 0x1A
character when appending data.

MS-DOS stores the size of a file as an exact number of
bytes.  Unfortunately, it retained the control-Z character,
even though it was now unnecessary.  This has caused all
sorts of pain; for instance, if a byte in a text file gets
corrupted to 0x1A, the remainder of the file is lost.

I never had trouble appending to a CP/M file, but I did
encounter problems with MS-DOS version 3, which contained
a bug: when COMMAND.COM appended data to a text file
(e.g. "dir >>file.txt"), and the existing file ended
with a hex 1A, the hex 1A wasn't overwritten.  This meant
that all appended text, although physically present in
the file, would be inaccessible to any program reading it.

Although this bug was fixed in the next release, it was part
of my early introduction to Microsoft's quality standards -
"sort of works, most of the time" - which formed the philosophy 
of the most famous producer of crappy software in history.

-- 
/~\  Charlie Gibbs                  |  They don't understand Microsoft
\ /  <cgibbs@kltpzyxm.invalid>      |  has stolen their car and parked
 X   I'm really at ac.dekanfrus     |  a taxi in their driveway.
/ \  if you read it the right way.  |    -- Mayayana

Back to comp.os.linux.misc | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274b.net> - 2021-08-26 00:34 -0400
  Re: HA - Found a CP/M-86 image and C compiler for VBox Eli the Bearded <*@eli.users.panix.com> - 2021-08-26 05:05 +0000
    Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274b.net> - 2021-08-26 20:57 -0400
      Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-27 02:12 +0100
        Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-31 02:43 -0400
          Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-31 09:28 +0100
            Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-01 00:13 -0400
              Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-01 08:52 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 20:29 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-06 08:49 +0100
          Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-01 04:21 +0000
      Re: HA - Found a CP/M-86 image and C compiler for VBox jak <nospam@please.ty> - 2021-09-09 21:56 +0200
  Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-26 10:03 +0100
    Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274b.net> - 2021-08-26 20:36 -0400
      Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-27 02:08 +0100
        Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-29 01:32 -0400
  Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-26 12:26 -0400
    Re: HA - Found a CP/M-86 image and C compiler for VBox Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2021-08-26 19:49 +0300
      Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274b.net> - 2021-08-26 21:06 -0400
        Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-27 02:58 +0100
          Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-27 13:22 -0400
            Re: HA - Found a CP/M-86 image and C compiler for VBox Bobbie Sellers <bliss@mouse-potato.com> - 2021-08-27 11:26 -0700
              Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-28 01:22 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-28 09:53 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-29 02:08 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-28 12:11 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-29 01:08 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-29 04:01 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-29 23:32 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-08-30 00:51 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-30 00:06 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-08-30 14:03 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-31 01:25 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-01 04:21 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-04 01:37 -0400
            Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-28 09:40 +0100
              Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-28 12:20 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Allodoxaphobia <trepidation@example.net> - 2021-08-29 00:55 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-31 01:58 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-08-31 06:16 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-31 23:47 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-01 07:52 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Roger Blake <rogblake@iname.invalid> - 2021-09-02 01:49 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox pH <wNOSPAMp@gmail.org> - 2021-09-02 02:39 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-02 01:29 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-02 01:10 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-02 14:51 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Bobbie Sellers <bliss@mouse-potato.com> - 2021-09-02 13:25 -0700
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-02 21:24 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-03 03:38 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-03 09:14 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-04 01:01 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-03 12:13 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-04 01:16 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-03 03:19 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox scott@slp53.sl.home (Scott Lurndal) - 2021-09-03 14:00 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox Ahem A Rivet's Shot <steveo@eircom.net> - 2021-09-03 17:44 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox J. Clarke <jclarke.873638@gmail.com> - 2021-09-03 14:11 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Ahem A Rivet's Shot <steveo@eircom.net> - 2021-09-03 19:53 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Peter Flass <peter_flass@yahoo.com> - 2021-09-03 13:59 -0700
                Re: HA - Found a CP/M-86 image and C compiler for VBox J. Clarke <jclarke.873638@gmail.com> - 2021-09-03 20:18 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 02:14 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-05 09:47 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox drb@ihatespam.msu.edu (Dennis Boone) - 2021-09-05 10:00 -0500
                Re: real programmers, was HA - Found a CP/M-86 image and C compiler for VBox John Levine <johnl@taugh.com> - 2021-09-05 22:16 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-09-05 12:05 -0400
                Re: fine old languages, HA - Found a CP/M-86 image and C compiler for VBox John Levine <johnl@taugh.com> - 2021-09-05 22:20 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 23:00 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-07 20:12 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox Dan Espen <dan1espen@gmail.com> - 2021-09-07 16:27 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox J. Clarke <jclarke.873638@gmail.com> - 2021-09-07 18:30 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-08 00:17 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-06 08:50 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-09-06 11:16 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Rich Alderson <news@alderson.users.panix.com> - 2021-09-06 15:04 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Jerry Peters <jerry@example.invalid> - 2021-09-09 02:04 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 01:40 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-05 09:38 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Ahem A Rivet's Shot <steveo@eircom.net> - 2021-09-05 10:49 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-05 11:22 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox gareth evans <headstone255@yahoo.com> - 2021-09-05 11:31 +0100
                OT : Re: HA - Found a CP/M-86 image and C compiler for VBox gareth evans <headstone255@yahoo.com> - 2021-09-05 11:38 +0100
                Re: OT : Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-05 12:15 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-07 20:12 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox Ahem A Rivet's Shot <steveo@eircom.net> - 2021-09-07 22:05 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Stéphane CARPENTIER <sc@fiat-linux.fr> - 2021-09-05 10:13 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox J. Clarke <jclarke.873638@gmail.com> - 2021-09-05 09:50 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 20:18 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox J. Clarke <jclarke.873638@gmail.com> - 2021-09-05 22:38 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Ahem A Rivet's Shot <steveo@eircom.net> - 2021-09-06 08:53 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-05 12:22 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox usenet@only.tnx (Questor) - 2021-09-03 19:34 +0000
                Re: HA - Found a CP/M-86 image and C compiler for VBox Andreas Kohlbach <ank@spamfence.net> - 2021-09-03 19:57 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Anssi Saari <as@sci.fi> - 2021-09-03 08:27 +0300
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 01:03 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox Anssi Saari <as@sci.fi> - 2021-09-05 15:25 +0300
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-05 14:03 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2021-09-05 19:27 +0300
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-05 20:14 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-06 00:53 -0400
                Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-09-06 08:58 +0100
                Re: HA - Found a CP/M-86 image and C compiler for VBox Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2021-09-06 12:36 +0300
          Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-28 00:44 -0400
    Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-26 17:51 +0100
      Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-28 01:48 -0400
        Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-28 10:16 +0100
          Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-08-29 00:21 -0400
  Re: HA - Found a CP/M-86 image and C compiler for VBox Aragorn <thorongil@telenet.be> - 2021-08-26 19:53 +0200
    Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274b.net> - 2021-08-26 20:33 -0400
  Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-08-27 02:01 +0000
    Re: HA - Found a CP/M-86 image and C compiler for VBox The Natural Philosopher <tnp@invalid.invalid> - 2021-08-27 04:40 +0100
    Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-02 00:15 -0400
      Re: HA - Found a CP/M-86 image and C compiler for VBox Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-09-02 06:02 +0000
        Re: HA - Found a CP/M-86 image and C compiler for VBox SixOverFive <hae274c.net> - 2021-09-03 02:37 -0400

csiph-web