DOSPARTOFF
memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts));
memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts));
dp = (void *)(sec + DOSPARTOFF);
bcopy(buf + DOSPARTOFF, &od->od_slicetab,
dp1 = (struct dos_partition *)(&buf[DOSPARTOFF]);
memcpy(&dpcopy[0], cp + DOSPARTOFF, sizeof(dpcopy));
memcpy(&dpcopy[0], cp + DOSPARTOFF, sizeof(dpcopy));
part = (struct dos_partition *)(mbr + DOSPARTOFF);