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.
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.