Thanks to all (two) who responded.

I went to ftp://bseis.eis.cs.tu-bs.de/pub/hannken

and got copies of all of the isadma patches.

It appears that patch 95.12.30 thru 96.02.16 are 1.1

Where all latter patches are for current.

I have a AHA-1542CF and thought, how wonderful, now I can
use all 32Megs and remove that hardcoded 16Meg limit I put
in i386/machdep.c

After rebooting a patch kernel, the 154x driver will not 
detect my drives (I'm compiling right now and can't get back
to the error). Trying all the patches didn't work either.

Who maintains these patches?  And what 154x did they/you use?

jam