I have a Heath H11A (LSI-11/2 CPU!) with the Heath WH-27 floppy
diskette drives.  It boots and runs HT11 (Heath's crippled version of
RT11) just fine, but when I try to boot a real RT-11 v5 RX01 diskette it
just halts.  I thought that the WH-27 was RX01 compatible.  Am I wrong,
or is there some trick that Heath put in (maybe in the WH-27 boot ROMs?)
to keep it from working?
Thanks much,
Bob Armstrong