[Dev-C++] Inline ASM in MinGW

[Anita P. <lis...@bi...>]

Hi folks, I have a problem for any of you inline assembler gurus:

I have been using DJGPP for years, and recently switched to Dev-C++ which I 
instantly loved, but found
that a few functions I relied heavily on for console work don't exist: 
clrscr, gotoxy, readkey and clreol.

I wrote using inline assembler within macros replacement functions which 
compiled and ran fine on a copy of
DJGPP but upon using them in the MinGW compiler I get a weird problem. 
Simply that it compiles without a
hitch (even with the -Wall switch) but upon running crashes after the very 
first macro call.

I have included the clrscr() macro and a short version of my driver program 
as an example hoping someone can point
me in the right direction. (Excuse the VERY primative debugging used, but I 
haven't got the hang of most interactive
debuggers)

#define clrscr() \
         asm("movw $0x0600, %ax \n\t" \
             "movb $7, %bh      \n\t" \
             "movw $0x0000, %cx \n\t" \
             "movw $0x184f, %dx \n\t" \
             "int $0x10"             );


int main(void)
{
     FILE *smegfile;
     int  count;
     char key;

#ifdef DEBUG
     smegfile = fopen("smeg.txt", "wt");
     fprintf(smegfile, "START\n");
     fclose(smegfile);
#endif

     clrscr();

#ifdef DEBUG
     smegfile = fopen("smeg.txt", "wt");
     fprintf(smegfile, "CLRSCR()\n");
     fclose(smegfile);
#endif

     return 0;
}

output in smeg.txt:
START

Cheers

Stuart Downing