TTL Serial Input/Output Port Package Cosmonics Platform(s): TS 1000 Date: 1983 Price: $26 Software and plans for building input and output ports which fit inside a ZX81 or TS1000. When used with an RS232/TTL level converter, can connect to most RS232C peripherals. Media Related Content Articles Advertisements Image Gallery Tags RS232 Cosmonics TS 1000 RS232 People No people associated with this content.
