OS/2 1.1 build 4.72

4.72
	Build of OS/2 1.1
Architecture	x86 16-bit
Compiled on	1988-03-07
Base build
Works in

OS/2 1.1 build 4.72 is a build of OS/2 1.1 that was included with versions 1.03 and 1.04 of the Microsoft OS/2 SDK. It is the earliest known build to include the Presentation Manager interface. OS/2 Museum posted several screenshots of this build in 2011,^[1] and uploaded floppy images (in both the 3.5" and 5.25" variants) to the Internet Archive on 5 December 2022.^[2]

New features and changes[edit | edit source]

This is the earliest available build of Microsoft OS/2 to have the graphical Presentation Manager, a new GUI for managing and running OS/2 applications.
Updated the boot screen to be colored green on 8514/a display adapters and changed the "Version 1.0" string to "Version 1.1".
An SDK can be installed in this build, which appears to be sample applications primarily ported from Windows 2.x's SDK to run on OS/2.
This is the first build to have a watermark.

Bugs and quirks[edit | edit source]

Shutdown is incomplete and crashes the system, causing the speakers to repeatedly beep.
Help is primarily incomplete.
The system has a large chance of crashing upon exiting an OS/2 command line prompt.
By default, setup will only detect SCSI drives. By replacing the disk01.sys file with either disk01.esd or disk01.506, ESDI hard drives and Model 50/60 hard disks can be used respectively.
After partitioning the disk and restarting the computer, exit setup after restart and format drive C:, as the user is not promted to do so. Then, restart again and continue as usual. If then prompted to format C:, answer "NO".
Double-clicking the window menu to close a window has not been implemented yet, so the user has to select the "Close" command in the window menu.