8-Port asynchronous adapter - EIA 232

The EIA 232 is an 8-Port asynchronous adapter that provides support for attaching a maximum of eight EIA 232D asynchronous serial devices (such as modems, terminals, plotters, and printers) to a system unit.

The system must be based on a Micro Channel bus or an ISA bus and support up to eight 8-port adapters.

This adapter is fully programmable and supports asynchronous communications only. It can also add and remove start and stop bits and supports even, odd, or no parity on serial data. A programmable baud rate generator allows operation from 50 to 38,400 bps for the Micro Channel bus and 50 to 115,200 bps for the ISA bus. The adapters support 5-, 6-, 7-, or 8-bit characters with 1, 1.5, or 2 stop bits. A priority interrupt system controls transmit, receive, error, line status, and data set interrupts.