(DOS) Windows vs. NT Windows RAM

Sorry if I missed much. I left to teach an A+/Network+ bootcamp on sunday. I
forwarded my email to Earthlink which has been eating 100% of my mail. I had
someone turn the mail server off thursday night so I can go to the ISP
directly and pick up mail til I return...

Anyway....

Wasn't there some "feature" of one(all?) of the Windoze 9x that had an
> upper limit to the usable RAM, this limit being absent from the
NT-based
> phylum?

Yes. Windows 3.x through Me are DOS based. They have 640KB real memory
limits and then use high memory with 64K "swap outs".

NT4/W2K/XP/Win03 are all "protected mode" ram. The memory model is flat....

Tcat