Research Stream: DOS 2.x: Difference between revisions

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Created page with "Category:ProjectsCategory:StreamsCategory:OS/2 Recap of OS/2 1.0 Research Stream {{Infobox | title = Research Stream | image = OS2_Research_Stream_Thumbnail.png | header1 = DOS 2.x Exploration | title2 = VoD Link | value2 = [https://www.youtube.com/watch?v=tPwyWu3QYXU RESEARCH STREAM: The First Version of OS/2 ...] | title3 = Streamed On | value3 = June 7th, 2025 | title4 = Streamed by | value4 = NCommander | title5 = Stream type | value5..."
 
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{{Infobox
{{Infobox
| title = Research Stream
| title = Research Stream
| image = OS2_Research_Stream_Thumbnail.png
| header1 = DOS 2.x/MT-DOS 4 Initial Exploration
| header1 = DOS 2.x Exploration
| title2 = VoD Link
| title2 = VoD Link
| value2 = [https://www.youtube.com/watch?v=tPwyWu3QYXU RESEARCH STREAM: The First Version of OS/2 ...]
| value2 = [https://www.youtube.com/watch?v=tPwyWu3QYXU RESEARCH STREAM: The First Version of OS/2 ...]
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== Things Done ==
== Things Done ==
* Setup 86Box to emulate a IBM PC XT with two 10 MiB HDDs
=== DOS 2.x ===
* Installed DOS 2.x to the HDD
* Configured IBM XT CGA card with green monoscreen display
* Setup WordStar as one of the few apps that would run on this version
* Had some trouble getting stuff going but eventually got things started
* Rebuilt Microsoft DOS 2.x from source code, taking at least an hour (if not longer), and noting differences between the IBM version and the Microsoft version
* Formatted and installed DOS 2 with FDISK and copy
** This provides a baseline on how differences go between the two, but there are both technical and user differences between the two
* Tried out WordStar for a bit
* Decided to rebuild DOS 2 on DOS 2
** Seemed like a good benchmark to see how things did/didn’t change
** Had a false start due to forgetting exe2bin from disk 2
** Looked at DOS 2.0 source code while at it
** Took about 70 minutes to builds
** Turns out this source distro is not complete, doesn’t build IO.SYS which meansa  bootable system isn’t possible
** There was another DOS 2 src distro from OS2Museum, but it needs DOS 4 to build …
** Two versions of DOS
*** IBM features/standard features
*** Essentially customizations made to DOS to suit IBMs needs
*** Most notably, the default prompt, being A> vs A:\>
** 6:13PM started building
=== Multitasking DOS 4 (1985) ===
* Multiple versions, none of them appear to be final
* Microsoft released a beta version with MS-DOS 4’s source code
* There was also a later build known as Build 6.7
* Very broken
* Multitasking MS-DOS 4.00 internal work 2.06
** Used a full screen SM command, which could map commands back and forth
** Then use a keybind to switch to a session back and forth
** Very awkward UI, and the disk didn’t have tools like format and such
** SM was a command line utility that was loaded and then used to switch between sessions
* Build 6.7
** Somewhat better, uses double tapping Alt to switch sessions back and forth
** However, had weird behavior, and format crashed

Latest revision as of 18:30, 7 June 2025

Recap of OS/2 1.0 Research Stream

Research Stream
DOS 2.x/MT-DOS 4 Initial Exploration
VoD LinkRESEARCH STREAM: The First Version of OS/2 ...
Streamed OnJune 7th, 2025
Streamed byNCommander
Stream typeEmulated on 86Box

Description

So, in this stream, we establish a baseline by the common ancestor between the single user versions of DOS, and what would go on to become OS/2 1.x.

Things Done

DOS 2.x

  • Configured IBM XT CGA card with green monoscreen display
  • Had some trouble getting stuff going but eventually got things started
  • Formatted and installed DOS 2 with FDISK and copy
  • Tried out WordStar for a bit
  • Decided to rebuild DOS 2 on DOS 2
    • Seemed like a good benchmark to see how things did/didn’t change
    • Had a false start due to forgetting exe2bin from disk 2
    • Looked at DOS 2.0 source code while at it
    • Took about 70 minutes to builds
    • Turns out this source distro is not complete, doesn’t build IO.SYS which meansa bootable system isn’t possible
    • There was another DOS 2 src distro from OS2Museum, but it needs DOS 4 to build …
    • Two versions of DOS
      • IBM features/standard features
      • Essentially customizations made to DOS to suit IBMs needs
      • Most notably, the default prompt, being A> vs A:\>
    • 6:13PM started building

Multitasking DOS 4 (1985)

  • Multiple versions, none of them appear to be final
  • Microsoft released a beta version with MS-DOS 4’s source code
  • There was also a later build known as Build 6.7
  • Very broken
  • Multitasking MS-DOS 4.00 internal work 2.06
    • Used a full screen SM command, which could map commands back and forth
    • Then use a keybind to switch to a session back and forth
    • Very awkward UI, and the disk didn’t have tools like format and such
    • SM was a command line utility that was loaded and then used to switch between sessions
  • Build 6.7
    • Somewhat better, uses double tapping Alt to switch sessions back and forth
    • However, had weird behavior, and format crashed