Cromemco Octart

The card provided eight serial bus channels and a single bi-directional parallel port.

The serial connections were often used to interface eight computer terminals to the host system.

Octart superseded Cromemco's TUART and QUADART and IOP boards.

Unlike earlier boards, which merely formatted and exchanged individual data characters, the Octart featured a sophisticated DUART communications circuit plus an independent Z80A processor with 64 KB bytes of memory.

Each channel could be programmed to automatic wake-up mode for multidrop applications.