Apple III Serial Port: Pinouts (6/94)

Apple III Serial Port: Pinouts (6/94)

This article provides the pinouts and signal descriptions for the Apple /// serial port.
DB 25
Connector     Signal Name
 
 1  ...... Frame Ground
 2  ...... Transmit Data            (Tx)
 3  ...... Receive Data             (Rx)
 4  ...... Request to send          (RTS)
 5  ...... Clear To Send            (CTS)
 6  ...... Data Set Ready           (DSR)
 7  ...... Signal Ground
 8  ...... Data Carrier Detect      (DCD)
 19 ...... Secondary Clear To Send  (SCTS)
 20 ...... Data Terminal Ready      (DTR)

Article Change History:
27 Jun 1994 - Revised formatting, revised title.

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