I haven’t been able to find a picture of this model of Nimbus yet, but it was the successor to the Nimbus 1, and was based around the IBM Microchannel Architecture (MCA) of the newly introduced IBM Personal System/2 or PS/2 as it became known. Sadly VESA Local Bus and PCI architecture quickly outstripped MCA as a contender, and the technology went to that great recycling bin in the sky.
Superficially it resembled the later models of the PC-186, but of course had a PC-286 label on it instead.
This was the first RM Nimbus to be properly PC compatible without the need for emulators, and in the early incarnations used DOS 4.00 and Windows 2.0. It still supported “legacy” RM applications and screen resolutions from the PC-186 by using a program called “XMODE” to change between “IBM” and “RM” modes of operation, with “XMODE IBM” and “XMODE RM” commands, thus not requiring the use of the IBM Emulator used on the older PC-186.
It came equipped with a standard VGA display.
Latter versions used RM’s adapted Windows 3.00 which included special versions of Program Manager including a tweaked restricted version (progmanr.exe) which prevented end users from moving icons and program groups about on the Windows desktop.