The CPU board slides out from the back. The ram slot is available through a cutout on the CPU board. The CPU is a 68000 and HP made only 256k and 1M cards for these while other vendors made 2M and 4M versions. I think other card where not available due to ram cost.? Not sure that the system can handle more then 4M but the CPU is able to address up to 16M of address space.?
