UMB_HEAP.DOC
                  Documentation for UMB_HEAP.TPU
         (C) Copyright 1992, Brian D. Webb & P-Machinery
                 Release 1.1, January 18, 1992


UMB_HEAP is a programing tool for extending the Turbo Pascal 6.0
dynamic heap into Upper Memory Blocks (UMB).  By using UMB_HEAP,
you can give your programs up to 200K more RAM to work with.

Making the UMB's available for heap space allows your programs more
conventional memory to work with.  For each kilobyte of heap space
you move into upper memory, you increase the memory available for
code and overlays by the same amount.

To use UMB_HEAP, just include the unit UMB_HEAP in the USES clause
of your main program and call the procedure EXTEND_HEAP.  Assuming
that your system has an upper memory manager like QEMM386 or
EMM386, all available UMB's will be added to the TP6 heap.

When using debuggers, the UMB may not have a chance to be deallocated
properly.  To address this problem, I have include a Boolean variable
called UMB_HEAP_DEBUG forces UMB_HEAP to deallocate UMB's immediately
after allocating them while still retaining their address and size.
As long as your program does not manipulate upper memory, this
strategy works.  Set UMB_HEAP_DEBUG to TRUE while debugging, overwise
set it to FALSE.  It's default value is FALSE.

The only reason this release doesn't contain the source code to
UMB_HEAP is because I'm waiting to see if anyone is really
interested in it.  If so, then I will prepare some decent
documentation and include the complete source code.

UMB_HEAP is shareware.  If you like it, please send $10 to the
address below.  This will register you for non-commercial use of
this tool and entitle you to ALL future versions of it.


Please forward comments and suggestions to:

     Brian D. Webb
     CompuServe [76436,1131]


Send registration fees to: (including your name and address)

     Brian D. Webb
     3700 Garth Road #1408
     Baytown, TX 77521