typedef unsigned char uint8_t;
uint8_t buffer[10];
uint8_t xdata xbuffer[300];
uint8_t code cbuffer[10] = {'A','B','C','D','E','F','G','H','I','J'};
uint8_t index;

void main(void) {
  for (index = 250; index < 255; index++) {
    if (*(buffer+8+index) == 0x47) break;
    if (buffer[index + 8] == 0x47) break;
    if (*(xbuffer+8+index) == 0x47) break;
    if (xbuffer[index + 8] == 0x47) break;
    if (*(cbuffer+8+index) == 0x47) break;
    if (cbuffer[index + 8] == 0x47) break;
  }
}