Hi, Joe.
Correct me if I'm wrong, but I think that all old Macintoshes (compacts, IIs, LCs, etc.) use 30-pin SIMM modules. The difference between them are the speed requeriments, but I bet that the LC's memory is fast enough for any compact Mac (except, perhaps, the SE/30, the Classic II and the CC/CCII).
All of them use 30-pin SIMMS, except for one, the mighty 40 Mhz IIfx which uses special 64-pin SIMMS.
I think that most compact Macs need the memory modules to be placed in couples. That is because 30-pin SIMMS have an 8-bit bus, and the 68000's data bus has 16 bits (thus 2x8=16 bits ;-) ). Exceptions to this are the 68030-based compacts (the same listed above: SE/30, Classic II and CC/CCII). The 68030 processor has a 32-bit data bus, and thus it needs that the SIMMs are placed in groups (banks) of four.
The Classic II and the CC share more or less the same mobo as the LCII, which combined a 68030 processor with a 16 bit data bus (they were crippled by Apple to protect their high end market). You'll find that the SE/30 is a much more powerfull machine than a Classic II or a Color Classic.
Marten
-- Vintage Macs list nanny
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