The Stack Overflow podcast is back! Listen to an interview with our new CEO.

New answers tagged


I asked Bob Supnik (J-11 CPU project lead, SIMH creator) about this, and this is his response. The answer is no. If the MMU is not operating, the MT/FPI/D instructions operate on physical addresses and are limited to 16bit addresses. The PSW mode bits (in particular, previous mode) are operative for choosing which stack pointer is used if the ...

Top 50 recent answers are included