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Includes the MultiMac driver framework for modern audio chipsets and accelerated VESA video drivers.
If you purely want to experience historical computing, older versions of IBM OS/2 (such as OS/2 Warp 3 or Warp 4) are widely considered abandonware by the vintage community. While still technically copyrighted, older ISOs from the 1990s can be found on digital preservation archives like WinWorld or the Internet Archive. Keep in mind that these original versions will not run on modern PCs and must be installed in emulators like Bochs, QEMU, or older configurations of VirtualBox. Open-Source OS/2 Clones (eComStation and Alternatives) arcaos 51 iso free