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CROAK3.C
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C/C++ Source or Header
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1996-06-17
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936b
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38 lines
// croak3.c
// C source example #3 on using UserDump API function
#include <stdio.h>
#include <i86.h>
char buffer[128];
char *oldstring="This is going away, so it can say anything it wants";
char *newstring="What I really wanted to say is this: Moo!";
void main(void)
{
int i;
union REGS regs;
struct SREGS sregs;
strcpy(buffer,oldstring);
segread(&sregs);
sregs.es=sregs.ds;
regs.x.edi=(int)buffer;
regs.w.cx=128;
regs.h.bl='A'; // ASCII dump
regs.h.bh=1; // preset dump bytes
regs.w.dx='-X'; // -X fill buffer
regs.w.ax=0xff2f;
int386x(0x31,®s,®s,&sregs);
strcpy(buffer,newstring);
croaker();
}
void croaker(void)
{
int i,peekaboo=0x12345678;
printf("%d ",*(int *)peekaboo); // if this one doesn't GPF,
peekaboo=0x87654321; // then
printf("%d\n",*(int *)peekaboo); // this one will
}