BB_ADJUST_OFFSET
j = BB_ADJUST_OFFSET + our_int16s[i];
bb16[BB_ADJUST_OFFSET + 2] = htobe16(SUN_DKMAGIC) - bb16[254];
bb16[BB_ADJUST_OFFSET + 3] = chkdelta >> 1;
bb16[BB_ADJUST_OFFSET + 7] = chkdelta >> 1;
assert(bb16[BB_ADJUST_OFFSET + 6] == 0);
assert(bb16[BB_ADJUST_OFFSET + 012] == 0);
bb16[BB_ADJUST_OFFSET + 6] += 0x8000;
bb16[BB_ADJUST_OFFSET + 012] += 0x8000;