This appendix contains these sections:
Each Origin2000 or Onyx 2 system comes with two standard 9-pin serial ports. These ports can support either RS-232 or RS-422 interface devices. Figure B-1 shows the location and pinouts for a serial port. Optional additional serial ports are also available.
This connector departs from traditional Silicon Graphics usage:
Pin 2 (not pin 3) is Receive Data (RD)
Pin 3 (not pin 2) is Transmit Data (TD)
Pin 5 (not pin 7) is signal ground
gender is female (not male)
Table B-1 shows the correspondence between this connector and the SP connector.
Table B-1. Origin2000/Onyx2 and SP Serial Connectors
Origin2000/Onyx2 Serial Connector Pin | SP Connector Pin |
|---|---|
2 | 3 |
3 | 2 |
5 | 7 |
The RS-232 standard recommends the use of cables no longer than 50 feet (15.2 meters). (This standard should also be applied for an RS-422 connector.) Longer runs increases the possibility of line noise which can affect data transmission and cause errors. For cable runs longer than 50 feet (15.2 meters), use an appropriate extender device.
Figure B-2 shows pin numbering for the Origin200 serial port.
Table B-2 shows the connector pin assignments for the serial ports in RS-232 mode.
Table B-2. Origin200 Serial Port Pin Assignments, RS-232 Mode
Pin | Assignment |
|---|---|
1 | Data Carrier Detect (DCD) |
2 | Receive Data (RXD) |
3 | Transmit Data (TXD) |
4 | Data Terminal Ready (DTR) |
5 | Ground (GND) |
6 | Data Set Ready (DSR) |
7 | Request To Send (RTS) |
8 | Clear To Send (CTS) |
9 | (Not Connected) |
The OCTANE workstation serial ports can operate in RS-232 electrical levels with a standard PC pinout; the range of supported baud rates is 300 baud to 460K baud. Figure B-3 shows pin numbering.
Table B-3 shows cable pinout assignments for the serial ports.
Table B-3. OCTANE PC-Compatible Serial Port Pinout
Pin | Assignment | Description |
|---|---|---|
1 | DCD | Data Carrier Detect |
2 | RD | Receive Data |
3 | TD | Transmit Data |
4 | DTR | Data Terminal Ready |
5 | SG | Signal Ground |
6 | DSR | Data Set Ready |
7 | RTS | Request to Send |
8 | CTS | Clear to Send |
9 | RI | Ring Indicator |
For information on operating the serial ports with Macintosh style electrical levels and a Macintosh-compatible pinout or with ANSI/SMPTE 207M electrical levels and pinout, or for information on connecting a dumb terminal, see the OCTANE Workstation Owner's Guide.