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Re: Windows 32-bit

From "Kerr-Mudd, John" <admin@127.0.0.1>
Newsgroups comp.os.ms-windows.misc, alt.comp.os.windows-xp, alt.windows7.general, microsoft.public.windowsxp.general
Subject Re: Windows 32-bit
Date 2024-01-02 13:22 +0000
Organization Dis
Message-ID <20240102132218.3083d470dfb04d10607a4c2c@127.0.0.1> (permalink)
References (1 earlier) <uj8760.gr8.1@ID-201911.user.individual.net> <qj4jlilucaviemtconeh4qis7jh585q917@4ax.com> <ujdrgd.b4k.1@ID-201911.user.individual.net> <f2usoi10fo0tv1v1npe4v2lijp8g2vqe9a@4ax.com> <7bstoitikvu7ki2891onhr2r5pdlrmd7dg@4ax.com>

Cross-posted to 4 groups.

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On Fri, 29 Dec 2023 11:31:31 -0500
Tim Slattery <TimSlattery@utexas.edu> wrote:

> 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.

No to that 2nd sentence; the upper address space was used for direct
addressing the screen buffer (0xB000 for mono, 0xB800 for text/CGA, 0xA000+
for higher modes)), extension card interfaces, and ROM (E000 & F000) - I
suppose you could argue that a ROM BASIC is an operating system, but I
wouldn't accept that. Certainly user programs were only allowed a max
memory footprint of 640k - in practice much less due to DOS overhead.

> 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


-- 
Bah, and indeed Humbug.

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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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