The PDP-11 has virtual memory with 8k pages. There are four address spaces of 64k each, one each for supervisor/kernel/user and for each of these text/data. T

The PDP-11 has virtual memory with 8k pages. There are four address spaces of 64k each, one each for supervisor/kernel/user and for each of these text/data. This was extensively used with e.g. 2.11BSD to cram programs into the address space that are way too large for what the PDP-11 can do. And yes, that includes the ability to resume on memory trap. You can read more on the Gunkies site: http://gunkies.org/wiki/PDP-11_Memory_Management http://gunkies.org/wiki/PDP-11_Memory_Management