kodzik--klawa

#include <REGX52.H>

unsigned char code Tab[]={0xFE,0xFD,0xFB,0xF7};
unsigned char code koder[]={0xED,0xDE,0xdd,0xdb,
0xbe,0xbd,0xbb,0x7d,
0x7b};
unsigned char code Cyfry[]={0x3f,0x06,0x5b,0x4f,
0x66,0x4d,0x7d,0x07,
0x7f,0x6f};

unsigned char data index =0;
unsigned char bdata buf;
unsigned char xdata CyfraJ _at_ 0xFD00;
unsigned char data  cyfra2=0xed;

sbit K1 = buf^4;
sbit K2 = buf^5;
sbit K3 = buf^6;
sbit K4 = buf^7;

void main(void)
{
  P1 = Tab[index];
  for(;;)
  {
    buf = P1;
    if ((K1&K2&K3&K4)==0)
    {
      cyfra1=cyfra2;
      cyfra2=buf;
      while((K1&K2&K3&K4)==0)
      {
        cyfraJ = koder(cyfra2);
        cyfraD = koder(cyfra1);
        buf = P1;
      }
    }
    else
  }
}