ReverseMem V1.0 by Chris Hodges
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Introduction
~~~~~~~~~~~~
This command installs a small patch in  exec's  memory  allocation  routine
which  will  set  the  MEMF_REVERSE bit on every memory allocation. Why can
this be a sensible to do? Look at this example:

During boot-up, you're displaying a  nice  boot  picture  in  a  very  high
resolution,  let's  say 800*600 in HAM8. This screen will take about half a
megabyte of chip memory. After your workbench has been loaded,  the  screen
disappears,  but  oh  no,  the  chip memory is fragmented, the largest chip
memory chunk is only about 1 MB large.  This  problem  can  be  avoided  by
telling  exec  to allocate the memory for the screen in the lower region of
the memory, which is done by setting the MEMF_REVERSE flag. By  doing  this
on temporary memory allocations, your memory will stay much less fragmented
than without.
 
Requirements
~~~~~~~~~~~~
ReverseMem needs Kick 2.04 or  higher.  The  use  of  patch  handlers  will
probably cause some problems and should be avoided (not tested, however).

Usage
~~~~~
ReverseMem [OFF] [CHIPONLY] [NOCHIP]

The patch will be installed, if you don't specify the OFF switch.

Optionally, you can give the CHIPONLY or NOCHIP keywords which  will  force
the  patch  to  be  only  applied  on chip memory (CHIPONLY) or fast memory
(NOCHIP).

ReverseMem  should  be  turned  off  directly  after  the  critical  memory
allocation. Example from my startup-sequence:

  ReverseMem >NIL: CHIPONLY
  PicBoot DH1:Grafik/BootLogos/#? FJ FI 2 FO 3 FWB 1 BB DL 125 P D
  ReverseMem >NIL: OFF
 
History
~~~~~~~
V1.0 (30-Jun-96): First release.

Contact address
~~~~~~~~~~~~~~~
Any mails or donations to:

Chris Hodges                    Account: 359 68 63
Kennedystr. 8                   BLZ    : 700 530 70
D-82178 Puchheim                Bank   : Sparkasse Fürstenfeldbruck
Germany
Tel.: +49-89/8005856
Email: chris@sixpack.pfalz.de