with DOS/4GW? - Open Watcom

DOS Programming Guide
5.5.2 Spawning Protected-Mode Applications Under Phar Lap
386|DOS-Extender
In the case of the Phar Lap 386|DOS-Extender, some real-mode memory must be set aside at
link time for spawning the DOS extender, otherwise the spawning application will be assigned
all the system memory at startup. This is done at link time by specifying the runtime minreal
and runtime maxreal options, as demonstrated by the following programs.
/*
SPWNRPLS.C - The following program demonstrates how to
spawn a Phar Lap application.
Compile & Link:
wcl386 /l=pharlap /"runt minr=300K,maxr=400K" spwnrpls
*/
#include
#include
void main()
{
int app2 exit code;
puts( "Spawning a protect-mode application..."
"using spawnlp() with P WAIT" );
puts( "Spawning application #2..." );
app2 exit code = spawnlp( P WAIT, "run386",
"run386", "spwndpls", NULL );
}
/*
printf( "Application #2 returned with exit code %d",
app2 exit code );
SPWNDPLS.C - Will be spawned by the SPWNRPLS program.
Compile & Link: wcl386 /l=pharlap spwndpls
*/
#include
#include
void main()
{
puts( "\nApplication #2 spawned\n" );
/* Exit with error code 59 */
exit( 59 );
}
32 How do I spawn a protected-mode application?