PP Presentation

• The 6850 is an ACIA (asynchronous Communicatinos Unterface Adapter. D0..D7 are bidirectional data lines (just like RAM). CS0..2 are chip selects, RS is a register select (two read-only, two write only). Thre is one enable line (E) one R?W line and seven data and data control lines (RXC TXC DCD RTS RxD TxD and CTS.

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