CTheEscape/c/Input

#include <stdio.h>
#include "swis.h"
#include <kernel.h>

// SWI Registers
extern _kernel_swi_regs inreg;
extern _kernel_swi_regs outreg;

int input_readkey(int key)
{
    inreg.r[0] = 129;
    inreg.r[1] = key ^ 255;
    inreg.r[2] = 255;
    _kernel_swi(OS_Byte,&inreg,&outreg);
    
    if(outreg.r[1] == 255)
      return 1;
      
    return 0;
}