__nvram_read_byte
*p = __nvram_read_byte(i);
contents[i] = __nvram_read_byte(i);
sum += __nvram_read_byte(i);
return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff)) &&
(__nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
sum += __nvram_read_byte(i);
sum += __nvram_read_byte(i);
expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
__nvram_read_byte(PC_CKS_LOC+1);
sum += __nvram_read_byte(i);
*p = __nvram_read_byte(i);
contents[i] = __nvram_read_byte(i);
c = __nvram_read_byte(i);