SGI Monitor Digital Video Port

This pin out is used with the Silicon Graphics Inc [SGI] Digital Video Monitor Port with a DB-9 pin Connector.
This video interface is obsolete and out-dated.
DB-9 connectors are also in decline; D-Sub Connector Manufacturers, or D-Sub Mechanical Drawing
The serial port pinout is included here as a related interface. However this link covers the RS-232 port.

9-Pin D as used with a SGI Video Monitor

SGI Video Port

GPI stands for General Purpose Interface.

SGI Digital Video Pinout, DB-9
Pin Signal Assignment
1 Analog Video Genlock In
2 Analog Video Genlock Gnd
3 GPI In
4 GPI In Gnd
5 NC [No Connect]
6 Analog Video Genlock loop-through
7 Analog Video Genlock Gnd
8 GPI Out
9 GPI Out Gnd

SGI Serial Port

Serial Port Pinout Assignments
Pin # Signal name Signal Description
1 CD Carrier Detect
2 RXD Receive Data
3 TXD 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

SGI Serial Port Cable

Unlike a serial port which can have only one pin assignment.
A cable may have a different pin assignment on both sides of the cable.
This example is for a SGI Dialbox to O2/Octane connector.
A Dialbox is an obsolete 3D rendering tool, a peripheral component used with computers.

Serial Port Pinout Assignments
Female End
Dial Box
Female End
1 (DCD) Carrier Detect 8 (DCD)
2 (RD) Receive Data3 (RD)
3 (TD) Transmit Data 2 (TD)
5 (SG) Ground 7 (GND)
7 (RTS) Request To Send 4 (RTS)
8 (CTS) Clear To Send 5 (CTS)
9-Pin Db male connector

Silicon Graphics makes Servers and Workstations, among other things.
Related topic; SGI DB-15 Video Interface [also out-dated].

Back to the main PC Video Monitor Bus page, or to the main PC Interface Bus page.
Use the Buses icon at the bottom of the page to reach the top level index for all bus types.
Use the Equipment icon at the bottom of the page to reach manufacturers of PC Monitors.
For other product vendors; Listing of Component Manufacturers [alphabetic listing].

This product is obsolete or past Phase 6 of the Life Cycle Stages [End-of-Life Definition].
The editor's recommendation is use at your own risk.

Editor Note; The information listed is accurate but the actual interface is obsolete and should not be used for new designs. However; it is possible that there may be legacy systems [fielded systems] which needs to be repaired, reworked, or interfaced to, but other than that it's old technology. As an electrical engineer I would not even use a Dsub connector in a new design. Of course it's understandable that some companies may use a computer until it fails, or that a military system might be fielded for decades.

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Modified 12/23/11
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