[Emacs-diffs] emacs/msdos INSTALL

[Eli Zaretskii]

CVSROOT:        /cvsroot/emacs
Module name:    emacs
Changes by:     Eli Zaretskii <eliz>    08/12/19 11:02:27

Modified files:
        msdos          : INSTALL 

Log message:
        Document the problems on Windows Vista and the --with-system-malloc 
option
        to config.bat.

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/emacs/msdos/INSTALL?cvsroot=emacs&r1=1.4&r2=1.5

Patches:
Index: INSTALL
===================================================================
RCS file: /cvsroot/emacs/emacs/msdos/INSTALL,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -b -r1.4 -r1.5
--- INSTALL     15 Nov 2008 15:41:36 -0000      1.4
+++ INSTALL     19 Dec 2008 11:02:27 -0000      1.5
@@ -99,6 +99,25 @@
 which is used by config.bat.  To resolve this, move the DJGPP's `bin'
 subdirectory to the front of your PATH environment variable.
 
+Windows Vista has several bugs in its DPMI server related to memory
+allocation: it fails DPMI resize memory block function, and it
+arbitrarily limits the default amount of DPMI memory to 32MB.  To work
+around these bugs, first configure Emacs to use the `malloc' function
+from the DJGPP library.  To this end, run CONFIG.BAT with the
+"--with-system-malloc" option:
+
+    config --with-system-malloc msdos
+    make install
+
+In addition, you'll need to install Service Pack 1 (SP1) or later to
+Windows Vista and enlarge its DPMI memory limit by setting the value
+of this Registry key:
+
+  HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Wow\DpmiLimit
+
+Create this key if it does not exist.  The value is a DWORD; setting
+it to 536870912 should let Emacs use up to 512MB of memory.
+
 To install the international fonts, chdir to the intlfonts-X.Y
 directory created when you unpacked the intlfonts distribution (X.Y is
 the version number of the fonts' distribution), and type the following