segmented memory models

[Eric J Korpela]

On Thu, Aug 7, 2008 at 12:54 PM, Chuck Guzis <cclist at sydex.com> wrote:
> ISTR Windows 3.0 "standard mode" on a 386 could be considerably
> faster than using the 386 "enhanced" mode--if you had enough memory
> installed.

It was for Windows apps, but the penalty was a single non-multitasked
DOS box.  In "enhanced mode" windows apps were living in a shared v86
machine, rather than under 286 protected mode.  It took a lot of
fiddling with page tables to keep them happy without really enforcing
a 640K shared address space.

Pardon me, I'm having flashbacks about locking and unlocking memory handles.

Eric