S1000 = 4 memory slots ( require hardware mod to install more memory) - 2 meg stock (EXM005) - can be updated to 32meg via four 8 meg expanders boards (EXM008) - You can mix any combination of EXM005 and EXM008.

S1100 = 4 memory slot ( requires dip switch to be changed to install more memory) - 2 meg stock (EXM005) - can be updated to 32meg via four 8 meg expanders boards (EXM008) - You can mix any combination of EXM005 and EXM008.

S2800 = 2 memory slots - 2 meg stock (EXM3008) - can be updated to 16 meg via two 8 meg expander boards (EXM3008) - You can mix EXM3002 and EXM3008

S3000= 4 memory slots - 8 meg stock (EXM3008) - can be updated to 32 meg via four 8 meg expander boards (EXM3008) - You can mix EXM3002 and EXM3008

S3200 = 4 memory slots - 8 meg stock (EXM3008) - can be updated to 32 meg via four 8 meg expander boards (EXM3008) - You can mix EXM3002 and EXM3008

CD 3000 = 2 memory slots - 2 meg stock (EXM3002) - can be updated to 16 meg via two 8 meg expander boards (EXM3008) - You can mix EXM3002 and EXM3008

MPC3000 = 1 memory slot - 2 meg stock (EXM3002) - Can be updated to 16 meg via 1 8 meg expander board (EXM3008) and two SIMM 470. The EXM3008 has slots for SIMMS