ome MSX-1 computers seem to have only one cartridge slot, on top. On the back there is a so called 50 pin dual row expansion connector, which is in fact a cartridge slot. I know of Toshiba HX-10, Sanyo MPC100, Spectravideo SVI.728,  Deawoo CPC-200, Goldstar FC200 to have such a connector, which can be made … Continue reading Second slot HX10, MPC100, SVI.728, CPC-200, FC-200