> programming of OS/2.  I have read that OS/2 creates virtual machines each
> 4GB of memory. One for OS/2 programs and one for Win progs.  That might not

Close.  Each process's maximum address space is 512 megs (64 of which is
shared by all processes.)  Of course you have to allocate it, and complex
stuff goes on behind the scenes to deliver that memory to processes
(virtual memory, physical ram, committed and non-committed pages...  It's
complicated, but it's also automatic.)

> right, so please correct me.  How does OS/2 create each virtual machine?  I 
> understand how one system has 4GB of memory using paging but how could a

OS/2 creates a virtual machine for each app also.  It's a capability of the
386 processor's protected mode.  NT is actually based on the OS/2 1.0
source code.  In fact, if you format a non-system disk with NT 1.0 and
reboot with the disk in the drive, it'll give you the same "OS/2!!!!
SYS????" error message you get when you do that with OS/2.

Rob
 
--- Xblat