Regardless of the warning, I tried the non-FPU MRG kernel
on the IIsi. It put up a bunch of gray bars (all?) and hung at
'adb: bus subsystem'.
 It also seems to display a bogus amount of real memory
(83881984) when I set the memory to 16mb and turn auto-detection
off. The available memory (13563952) seems about correct for 16mb
of real memory.
-- 
'Good-bye and hello, as always'