Simtel MSDOS 1992 June/SIMTEL_0692.cdr/msdos/sysutl/switchar.arc/SWITCHAR.C

C/C++ Source or Header | 1988-07-10 | 512 b | 26 lines

#include <stdio.h>
#include <dos.h>

#define dos_function 0x37
#define read_switch_character 0
#define write_switch_character 1

main(int argc,char *argv[])
{
    union REGS in_regs,out_regs;

    in_regs.h.ah = dos_function;
    if (argc == 2)
    {
        in_regs.h.al = write_switch_character;
        in_regs.h.dl = *argv[1];
    }
    else
        in_regs.h.al = read_switch_character;
    intdos(&in_regs,&out_regs);
    fputs("switch character: ",stderr);
    fputc(out_regs.h.dl,stderr);
    fputc('\n',stderr);
}