Okay, I just checked… my XP SP2 Pro system has PAE enabled (comes automatically with DEP). So for shits and giggles I enabled memory remapping in the BIOS and rebooted Windows. I know from MemTest that 2 out of my 4 gigs will now appear in the 4-6 GB range.
Yet Windows tells me that it has only 2 GB total! Total available memory, according to Task Manager: 6 GB = 2 GB RAM + 4 GB page file.
Exactly where is that magical PAE memory supposed to appear?