> 
> I just tried the official kcadpt12.fs on my EISA machine with
> 1742 and 7740 scsi devices.  The kernel boot died when it
> scanned what it thought was a broken 1542.
> 

You should configure the 1740 for "enhanced mode", and it won't emulate
a 1542 anymore. (the 7740 might be similar?)

-Andrew