Changes made after release 1.5:
priam.c: added UNISOFT define which allows access to the boot blocks
of the disk - when it is not defined the results are the same
as for release 1.5 - it is not defined now

conf.c: changed the tt_addr field of co_ttptr[0] to 1 from 0 - otherwise
pstat thinks there is no co_ttptr[0]

config.c: changed oemmsg