June 23rd, 2024

Creating New Installation Media for MS-DOS 4.0

Microsoft released MS-DOS 4.00 source code in 2024, prompting the community to develop MS-DOS 4.01 due to missing official media. Challenges arose in recreating installation media, including creating stub executables and addressing missing files. Installation from floppies had mixed results, with various disk downloads provided for users. Feedback is welcomed on fabulous.community.

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Creating New Installation Media for MS-DOS 4.0

Microsoft released the source code of MS-DOS 4.00 in April 2024, leading the community to create MS-DOS 4.01 due to missing official installation media. The focus shifted to creating 720k images for practicality and compatibility. Some program files and the DOSSHELL environment were absent in the open-source release, requiring workarounds. Missing files were addressed by creating stub executables, ensuring installation continuity. Disabling DOSSHELL posed challenges due to its integration in the installation process, requiring modifications in multiple files. The process involved fixing the SELECT executable and creating bootable floppy images for installation. While installing MS-DOS 4.0 on a hard drive was successful, installing from floppies had mixed results. Various installation disk downloads were made available for users. The article invites feedback and discussion on the fabulous.community platform, offering insights into the intricate process of recreating installation media for MS-DOS 4.0.

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