A: I have no experience (yet?) on this subject myself, but I can
give you a list of references: Michael Tischer (1990), Turbo Pascal
Internals, Abacus, Chapter 9; Michael Tischer (1992), PC Intern
System Programming, Chapter 12; Stephen O'Brien (1988), Turbo
Pascal, Advanced Programmer's Guide, Borland-Osborne, Chapter 4;
Chris Ohlsen & Gary Stoker (1989), Turbo Pascal Advanced Techniques,
Que, Chapter 11, Robert Jourdain (1992), Programmer's Problem
Solver, 2nd ed., Brady Publishing, pp. 68-87, and, maybe most
importantly, Dorfman & Neuberger, Turbo Pascal Memory Management
Techniques (with lots of code).
   Furthermore, Turbo Pascal delivery disks (at least 5.0) contain a
demos.arc archive which includes an ems.pas file.