Windows 1.0/DR5

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Windows 1 dr5 ms-dos-executive.png
Development Release #5
Kernel version 1.0
CPU architecture x86 (16-bit)
Edition N/A
BIOS date 1st November 1984
Key and TCB link No key required

Development Release #5 is a pre-release version of Microsoft Windows 1.0, shipped to testers in around November 1984. It is the last build from the Development Release line.

Machine requirements

This pre-release version supports IBM and COMPAQ personal computers with a graphical display adapter (either a Hercules or CGA display adapter), one floppy disk drive, and a hard disk drive.

Hercules support

While this version provides support for Hercules display adapters, only the files necessary to provide CGA support are copied by default. In order to copy the Hercules files, you will need to either modify the INSTALL.BAT file to copy the Hercules files by default, or copy the Hercules files later from the floppy disks yourself.

For Windows to copy the Hercules files by default, you will first need to make a backup copy of the first disk, and then make the following changes to INSTALL.BAT:

  • Change the following line:
copy a:ibmcolor.cin %1\windows\test\cursor.exe
copy a:ibmcolor.din %1\windows\test\display.exe
  • To the following:
copy a:hercules.cin %1\windows\test\cursor.exe
copy a:hercules.din %1\windows\test\display.exe

You can also rename or remove the CGA files and copy the Hercules files from the disk to the directory on your hard disk where Windows is installed.