The standard 68000 A600 has 1Mb of chip mem on board, which can be expanded to a
maximum of 2Mb by adding the 1Mb A601 trapdoor expansion (with optional clock
battery).
You can address up to 4Mb of extra memory using the PCMCIA slot, but this is
hideously slow, and it's hard to find a compatible card.
If you want to expand to a decent amount of memory and have reasonable speed,
then get an A630 accellerator, most can address up to 32Mb.
