Apple Macintosh XL Serial A connector

#Computer#Serial Interfaces#Apple
25 pin D-SUB MALE connector pin-out & layout

25 pin D-SUB MALE connector

PinNameDescription
1GNDGround
2TxDTransmit Data line
3RxDReceive Data line
4RTSRequest To Send
5CTSClear To Send
6DSRData Set Ready
7GNDGround
8DCDData Carrier Detect
9n/cNot connected
10n/cNot connected
11n/cNot connected
12n/cNot connected
13n/cNot connected
14n/cNot connected
15TxCConnected to TRxCA
16n/cNot connected
17RxCConnected to RTxCA
18n/cNot connected
19n/cNot connected
20n/cNot connected
21n/cNot connected
22n/cNot connected
23n/cNot connected
24TEXTConnected to TRxCA
25n/cNot connected

Apple Macintosh Serial connector

Apple Macintosh XL Serial B connector