The following paragraph applies only to OS/2 1.30.1 and OS/2 1.30.2, not the original OS/2 1.3 release. Let’s start from the easier to install versions and work our way back in time. In general, the difficulty of installing OS/2 increases with decreasing version number of OS/2-older versions are more picky. Any virtualization mode should work-software, VT-x, or AMD-V.The minimum (4MB) is enough, and 16-bit OS/2 cannot use more than 16 MB RAM. The memory size assigned to the VM generally does not matter.There are no ATAPI CD-ROM drivers for 16-bit OS/2, and some versions of OS/2 take noticeably longer to boot when a CD-ROM is present. The emulated CD-ROM should be removed.A floppy drive must be added to the VM-obviously, since the installation media are floppies.Sizes greater than approximately 504 MB require geometry translation, which OS/2 1.x does not support. Sizes of 500 MB or less are usable (and 500 MB is still huge for 16-bit OS/2). The hard disk must be smaller than 512 MB.The following settings must or should be modified: When creating a VM for OS/2 1.x, the chosen OS type does not matter much. Version 4.0.8 fixed problems with floppy emulation which were making installation difficult, but plenty of hurdles still remain. Most of those have little to do with virtualization and are simply a consequence of OS/2’s age-the PCs of the late 1980s were not quite like today’s PCs. In VirtualBox 4.0.8, things have moved further away from “impossible” and closer towards merely “tricky”. Installing 16-bit OS/2 in a virtual machine ranges between “tricky” and “impossible”, depending on the version of OS/2 and virtualization software used.
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