This is an old thread, but I'd like to add some data...
8 MiB SIMMs do work on the
IIsi, but
not on the SE/30 -- Death Chimes. They seem to be recognized OK by the Quadra 700; but mine are physically
too large and thick (chips on both sides!) so they keep pressing against each other on the Quadra's "slender" sockets, preventing a reliable contact
--
once it managed to boot all the way with them, but testing that configuration made me hear the Death Chimes for the first time ever...
2 MiB SIMMs don't work on the SE/30 either. However, I think the memory controller chip has something to do, because the
IIx (same ROM as the SE/30) is able to boot with the very same SIMMs, although only sees 1 MiB out of the two
The Quadra 700 works fine on 2 MiB SIMMs, as does the
Colour Classic; but on it they were a
tight fit, because of the PAL chip on them -- they have only 4 DRAM chips each.