Quoting Curt Sampson,

> Yesterday I reported here that under 1.1 I was getting "aha0: DMA
> beyond end of ISA" messages on a machine with an AHA1542CF and only
> 16MB of RAM. I also indicated that this, along with a lot of other
> errors, seemed to go away when I pulled the EIDE/floppy/IO board.

> Well, all the other errors went away, but it appears that this one
> didn't.

Make sure that the BIOS is not remapping any memory. Some BIOSs have a
'memory relocation' option which gains you 384K, but in your case
it might be mapped to >16Mb addresses. There have been reports about
such a problem in the past.

- Frank