Comments on: Looking back at MS-DOS 4.00M, or in the beginning before there was OS/2 https://virtuallyfun.com/2023/01/17/looking-back-at-ms-dos-4-00m-or-in-the-beginning-before-there-was-os-2/ Fun with Virtualization Wed, 19 Apr 2023 23:29:37 +0000 hourly 1 https://wordpress.org/?v=7.0 By: Stu https://virtuallyfun.com/2023/01/17/looking-back-at-ms-dos-4-00m-or-in-the-beginning-before-there-was-os-2/comment-page-1/#comment-328785 Wed, 19 Apr 2023 23:29:37 +0000 https://virtuallyfun.com/?p=12223#comment-328785 Interesting, and it has the square bracketed command prompt already, that would be in cmd.exe in all the later OS/2s.

I wonder if the multitasking / freezing code has anything in common with the much late dosshell.exe in DOS 5, or did they write that completely from scratch ?

]]> By: JRD https://virtuallyfun.com/2023/01/17/looking-back-at-ms-dos-4-00m-or-in-the-beginning-before-there-was-os-2/comment-page-1/#comment-319757 Sun, 22 Jan 2023 03:30:28 +0000 https://virtuallyfun.com/?p=12223#comment-319757 I’m surprised when you say that “the memory manager for DOS 4.00M & Windows is fundamentally different.” I thought that Microsoft insiders like Larry Osterman have said that Windows 1’s Kernal basically used the Multitasking DOS memory manager unchanged. What differences did you notice between Windows’ and DOS 4M’s?

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