BO_VERSION
dprintf("\nboot: V%d /boot interface.\n", BO_VERSION);
bootops.bsys_version = BO_VERSION;
bops->bsys_version = BO_VERSION;
if (boots_version == BO_VERSION)
BO_VERSION, boots_version);
if (boots_version == BO_VERSION)
BO_VERSION, boots_version);