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Re: Windows 32-bit

From Tim Slattery <TimSlattery@utexas.edu>
Newsgroups comp.os.ms-windows.misc, alt.comp.os.windows-xp, alt.windows7.general, microsoft.public.windowsxp.general
Subject Re: Windows 32-bit
Date 2023-12-29 11:31 -0500
Organization A noiseless patient Spider
Message-ID <7bstoitikvu7ki2891onhr2r5pdlrmd7dg@4ax.com> (permalink)
References <p9oelitcsv7st4g42edsd6ac7rreeilrud@4ax.com> <uj8760.gr8.1@ID-201911.user.individual.net> <qj4jlilucaviemtconeh4qis7jh585q917@4ax.com> <ujdrgd.b4k.1@ID-201911.user.individual.net> <f2usoi10fo0tv1v1npe4v2lijp8g2vqe9a@4ax.com>

Cross-posted to 4 groups.

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Steve Hayes <hayesstw@telkomsa.net> wrote:


>I think early programs running on IBM PC DOS or MS DOS were 8-bit,
>running on 8088 processors. The 286 and 386 ones were 16-bit. 

Not so. The original IBM-PCs were 16-bit machines. They used a kludge
to implement a 20-bit address space, allowing access to one megabyte
of RAM. You may remember that 340KB of that was reserved for the
operating system, leaving 640KB for user program.

1970's vintage machines, such as Cromemco, Zylog, etc, etc, were 8
bits. I'm a bit foggy on their addressing schemes, but at least some
of them could switch between banks of 64KB each.

The 80286 was basically 16-bits, but implemented "protected mode"
which allowed access to 16MB. Windows programers (if they're old
enough) may remember using "GlobalAlloc" and "GlobalFree" calls. Those
manipulated the Global Allocation Table, a 80286 protected mode
hardware kludge that kept track of all that RAM. 

The 80386 was Intel's first true 32-bit machine. Windows 3.0 386
version ran in 16-bit 80286 protected mode though. It took a while for
Windows to catch up with 32-bit processors.

-- 
Tim Slattery
timslattery <at> utexas <dot> edu

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Thread

Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-17 15:02 +0200
  Re: Windows 32-bit Marco Moock <mm+usenet-es@dorfdsl.de> - 2023-11-17 14:06 +0100
    Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-11-17 11:37 -0600
      Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-17 18:04 +0000
        Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-18 19:28 +1100
          Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-18 10:13 +0000
            Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-18 22:49 +1100
            Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-18 13:28 -0600
              Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-19 08:55 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-19 23:01 +1100
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-19 12:58 +0000
                Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-11-19 10:44 -0600
                Re: Windows 32-bit Bob F <bobnospam@gmail.com> - 2023-11-19 11:32 -0800
                Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-19 21:38 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-20 20:40 +1100
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-20 10:07 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-21 00:26 +1100
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-20 14:11 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-21 20:20 +1100
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-21 10:08 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-21 23:15 +1100
                Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-20 18:23 +0000
                Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-20 23:00 -0600
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-21 10:12 +0000
                Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-21 20:59 -0600
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-22 05:02 +0000
                Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-22 02:38 -0600
                Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-22 10:11 +0000
                Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-22 23:08 -0600
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-22 10:28 +0000
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-22 10:12 -0500
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-21 20:22 +1100
                Re: Windows 32-bit Char Jackson <none@none.invalid> - 2023-11-20 14:45 -0600
        Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-11-18 11:37 -0600
          Re: Windows 32-bit Zaidy036 <Zaidy036@air.isp.spam> - 2023-11-18 15:00 -0500
            Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2023-11-18 20:38 +0000
              Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-19 08:57 +0000
            Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-11-19 20:00 +1100
            Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-11-19 10:47 -0600
        Re: Windows 32-bit Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-11-18 13:10 -0800
          Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-19 09:00 +0000
            Re: Windows 32-bit Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-11-19 13:45 -0800
              Re: Windows 32-bit John Hall <john_nospam@jhall.co.uk> - 2023-11-20 08:46 +0000
      Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-19 06:12 +0200
        Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-11-19 10:54 -0600
  Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-17 13:36 +0000
    Re: Windows 32-bit GlowingBlueMist <zapbot@truely.invalid> - 2023-11-17 09:05 -0600
    Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-19 06:43 +0200
      Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 11:28 -0500
  Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2023-11-17 16:16 +0000
    Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-19 07:01 +0200
      Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2023-11-19 19:34 +0000
        Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-12-29 09:49 +0200
          Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2023-12-29 15:27 +0000
            Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-29 19:07 +0000
              Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2023-12-29 19:56 +0000
              Re: Windows 32-bit Tim Slattery <TimSlattery@utexas.edu> - 2023-12-30 12:10 -0500
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-30 20:27 +0000
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-12-30 23:14 -0500
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-31 05:12 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2023-12-31 23:17 +1100
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-31 12:37 +0000
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-12-31 11:35 -0500
                Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-31 19:15 +0000
                Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-12-31 14:43 -0600
                Re: Windows 32-bit Frank Slootweg <this@ddress.is.invalid> - 2024-01-01 11:25 +0000
                Re: Windows 32-bit Daniel65 <daniel47@nomail.afraid.org> - 2024-01-01 21:04 +1100
                Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-12-31 14:39 -0600
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-12-31 22:11 -0500
          Re: Windows 32-bit Tim Slattery <TimSlattery@utexas.edu> - 2023-12-29 11:31 -0500
            Re: Windows 32-bit "Kerr-Mudd, John" <admin@127.0.0.1> - 2024-01-02 13:22 +0000
  Re: Windows 32-bit Ralph Fox <-rf-nz-@-.invalid> - 2023-11-18 06:56 +1300
    Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-19 07:07 +0200
      Re: Windows 32-bit Ralph Fox <-rf-nz-@-.invalid> - 2023-11-19 21:07 +1300
      Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 13:52 -0500
        Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-12-29 09:54 +0200
  Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-18 06:53 -0500
    Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-11-19 07:41 +0200
      Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 03:17 -0500
        Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-19 16:57 +0000
          Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 13:57 -0500
          Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 14:21 -0500
            Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-19 21:22 +0000
              Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-11-19 17:56 -0500
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-19 23:59 +0000
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-20 12:45 +0000
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-20 15:19 +0000
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2024-06-07 00:39 +0100
                Re: Windows 32-bit "Auric__" <not.my.real@email.address> - 2024-06-07 14:50 +0000
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2024-06-07 11:33 -0400
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2024-06-07 16:50 +0100
                Re: Windows 32-bit "Auric__" <not.my.real@email.address> - 2024-06-08 16:34 +0000
                Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2024-06-08 18:09 +0100
                Re: Windows 32-bit Paul <nospam@needed.invalid> - 2024-06-09 19:03 -0400
                Re: Windows 32-bit "Auric__" <not.my.real@email.address> - 2024-06-11 06:16 +0000
        Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-12-29 09:59 +0200
      Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-11-19 13:32 +0000
  Re: Windows 32-bit Java Jive <java@evij.com.invalid> - 2023-11-19 13:59 +0000
    Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2023-12-29 10:07 +0200
      Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-12-29 04:21 -0500
        Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-29 11:56 +0000
          Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-12-29 12:26 -0600
            Re: Windows 32-bit Paul <nospam@needed.invalid> - 2023-12-29 22:38 -0500
              Re: Windows 32-bit "J. P. Gilliver" <G6JPG@255soft.uk> - 2023-12-30 08:30 +0000
                Re: Windows 32-bit Mark Lloyd <not.email@all.invalid> - 2023-12-30 15:26 -0600
        Re: Windows 32-bit Steve Hayes <hayesstw@telkomsa.net> - 2024-01-04 17:48 +0200

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