Redesigned motherboard with 2 MB of RAM, respectively, in a much improved "pizza box" case with a detached keyboard. All MEGA mainboard have a PLCC socket for the Blitter chip and some early models did not include the BLiTTER chip. Included a real-time clock and internal expansion connector. Some early MEGA 2 had a MEGA 4 mainboard with half of the mem chip places unpopulated and these MEGA 2 can be upgraded by adding the additional DRAM chips and some resistors for the control lines.