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This Z50Bus compatible card houses a 68B50 ACIA (single-channel serial input/output) device and a baud rate generator.
The documentation can be found at www.smallcomputercentral.com
The kit contains everything you need to build the card (as shown in the first picture), except solder, tools, and cleaning materials. To use the completed card you require a backplane (eg. SC501), a power/reset card (eg. SC502), a processor card (eg. SC516), a USB to serial adapter (5-volt power and 5-volt signals), a computer, and a terminal program, such as Tera Term.
Documentation (smallcomputercentral.com)
Products usually ship within 3 days