Chapter 4. Onyx2 Deskside I/O Interfaces and Cabling

The Silicon Graphics Onyx2 deskside system is designed to be a fully functional standalone workstation. When your deskside system is initially set up in the work area, a trained system support engineering (SSE) technician should configure and connect it. Any standard or optional interconnect technologies ordered from SGI may be connected at this time.

System interface connectors and cabling options are covered in the following sections in this chapter.

Graphics Interface Panels

This section describes the DG5 main display board, VIO5H video option connector panel board, and the Serial Digital Video Output from Graphics (GVO) option board. The information is mainly concerned with the DG5 board and options.

Table 4-1 summarizes DG5 configurations.

Table 4-1. DG5 Configurations

DG5

VIO5H

GVO

Description

DG5-2

Not required

Not required

Basic configuration: two high-resolution video outputs

DG5-8

Required

Not required

Eight high-resolution video outputs

DG5-2

Not required

Required

Two high-resolution video outputs with two CCIR601 outputs

Figure 4-1 shows connectors on the DG5-8 option board with the VIO5H daughterboard.

Figure 4-1. DG5-8 Board Location

Figure 4-1 DG5-8 Board Location

Note that the DG5-8 option requires the VIO5H board. Notice also that the DG5 board always goes in the rightmost graphics board slot in the Onyx2 deskside graphics system, next to the graphics BaseIO board assembly.

DG5 Board Operation

The display generator subsystem requests and receives digital frame buffer pixel data from the RM/TM board. The DG5 board processes the pixel data and streams it onto the video packet bus. The DG5 board also handles all pixel clocking and genlocking and cursor display functions, and performs the role of the functional manager.

From the packet bus, processed video can be sent to one of the video output channels, or to the NTSC or PAL encoder (VTR channel). The video output controller supplies data to a 3-DAC array that feeds the analog RGB signals out. NTSC or PAL circuitry signals come from the VOC through encoder and field buffer RAMs.

The default monitor resolution supported by the InfiniteReality2 board set and SuperWide monitor is 1920 x 1200 at 66 Hz. The maximum output bandwidth is about 300 Mpix/sec. With two monitors, each 1920 x 1200 at 66 Hz, speed is about 188 Mpix/sec. If you connect more than two monitors, you must use a combination of lower and higher resolution monitors that is within the limit of 300 Mpix/sec.

Table 4-2 summarizes DG5-8/VIO5H connectors.

Table 4-2. DG5-8/VIO5H Connectors

Label

Type

Function

Monitor 0 through 7

13W3

Variable high-resolution monitor outputs

S-Video

4-pin mini-DIN

Interface to SVHS VCR or monitor

CMPST 1

RCA jack; BNC

Interface to composite monitor or VCR

StereoView

9-pin sub-D

Interface to stereoview device

Genlock In

BNC

Interface to video mixer

Genlock Out

BNC

Loopthrough connection

Swap Ready

BNC

Interface to other graphics systems


Connectors on the DG5 Board

The DG5 board always goes in the rightmost graphics board slot in the Onyx2 deskside graphics system. Figure 4-2 shows the DG5 board without options (DG5-2).

Figure 4-2. DG5 Graphics Panel Connections (Without Options)

Figure 4-2 DG5 Graphics Panel Connections (Without Options)

The VIO5H video option connector panel board mounts on the DG5-8 and outputs five high-resolution video channels. Figure 4-3 shows connectors on the panel for the DG5-8 option board with the VIO5H daughterboard.

Figure 4-3. DG5-8 Board With Optional VIO5H

Figure 4-3 DG5-8 Board With Optional VIO5H

Figure 4-4 shows the 13W3 pinouts for the monitor connectors on the DG5/VIO2 I/O panel. Each 13W3 uses the same pinout pattern.

Figure 4-4. DG5/VIO5H 13W3 Connector Pinout

Figure 4-4 DG5/VIO5H 13W3 Connector Pinout

In the A1, A2, and A3 connectors, the center conductor carries the video signals. The outer conductors of the A1, A2, and A3 connectors are their video returns, which are tied to the monitor's grounded chassis.

Connectors on the Optional GVO Daughterboard

The graphics-to-video option (GVO) daughterboard comes assembled with the DG5 and is designed to provide direct output from graphics to video in real time.

The GVO daughter board has two CCIR601 connectors implemented as BNCs. Figure 4-5 shows connectors on the panel for the DG5-2 board with an optional GVO daughterboard combination.

Figure 4-5. DG5 and Optional GVO Connectors

Figure 4-5 DG5 and Optional GVO Connectors

Cabling Options for the DG5 Board

Three cable options are offered for the DG5:

  • 13W3-13W3: For use with the Silicon Graphics 24-inch (SuperWide) monitor and other compatible monitors; see Figure 4-6.

  • 13W3-five BNCs: Separate connectors for R, G, B, horizontal sync, and vertical sync (for monitors that require these separate connectors).

  • 13W3-13W3HV: Separate connectors for horizontal and vertical sync; for example, for synchronizing video out (genlocking).

    Figure 4-6. SuperWide Monitor

    Figure 4-6 SuperWide Monitor

Figure 4-7 shows the standard cable and adapters.

Figure 4-7. 13W3 Cable Options

Figure 4-7 13W3 Cable Options

Graphics BaseIO Interface Panel

The graphics BaseIO assembly (IO6G) is a graphics-oriented set of interface connectors that comes standard with each Onyx2 deskside system. The connectors on the BaseIO include support for Ethernet, two keyboards, analog and digital audio, serial and parallel connectors, and others. The following sections provide location and pinout information for these connectors.

Figure 4-8 identifies all the connectors on the graphics BaseIO panel.

Figure 4-8. BaseIO (IO6G) Panel and Connectors

Figure 4-8 BaseIO (IO6G) Panel and Connectors

10/100 Base-T Ethernet Port

A single 10/100 Base-T Ethernet connection is provided on the BaseIO panel. Figure 4-9 shows the location and pinouts of the connector.

Use of additional 10/100 Base-T Ethernet connectors is possible with an optional XIO board.

There are two LEDs on the RJ-45 Ethernet; the top (green) LED lights only when the system is transmitting. The bottom (yellow) LED lights whenever it sees any packet on the wire. This includes packets not destined for your system.

Just above the RJ-45 Ethernet connector is a set of four LEDs. They have the following functions:

  • The yellow LED on the far left (LED 1) lights to indicate SCSI activity on the BaseIO single-ended SCSI connector.

  • The green LED (LED 2) lights to indicate 100 Mb-per-second packet activity.

  • The yellow LED on the right (LED 3) indicates when the Ethernet is operating at full duplex rates of transfer or receive.

  • The rightmost green LED (LED 4) shows the Ethernet link test. It lights when linkstate is valid.

    Figure 4-9. 10/100 Base-T Ethernet Connector

    Figure 4-9 10/100 Base-T Ethernet Connector

Table 4-3 shows the cable pinout assignments for the Ethernet 100 Base-T Ethernet port.

Table 4-3. Ethernet 100 Base-T Ethernet Port Pin assignments

Pin

Assignment

1

TRANSMIT+

2

TRANSMIT–

3

RECEIVE+

4

(Reserved)

5

(Reserved)

6

RECEIVE–

7

(Reserved)

8

(Reserved)


Parallel Port Connector

The BaseIO board supports one IEEE 1284-C 36-pin parallel port connector. The location of this connector is shown in Figure 4-10. Pinouts for the parallel port connector are listed in Table 4-4.

Suitable cables for use with this port should be marked “IEEE 1284-compliant.” For most parallel printers, you can use a cable with an IEEE 1284-C connector at the Onyx2 end and an IEEE 1284-B connector (also known as a Centronics style) at the printer end.

Figure 4-10. Parallel Printer Port Location

Figure 4-10 Parallel Printer Port Location


Table 4-4.   Pinouts for the 36-Pin Parallel Port Connector

Pin

Signal

Source

1

Busy

Printer

2

Select

Printer

3

nAck

Printer

4

nFault

Printer

5

PError

Printer

6

Data 1 (LSB)

Bi-directional

7

Data 2

Bi-directional

8

Data 3

Bi-directional

9

Data 4

Bi-directional

10

Data 5

Bi-directional

11

Data 6

Bi-directional

12

Data 7

Bi-directional

13

Data 8 (MSB)

Bi-directional

14

nInit

Host

15

nStrobe

Host

16

nSelectIn

Host

17

nAutoFd

Host

18

Host Logic High

N/A

19

Signal ground (Busy)

N/A

20

Signal ground (Select)

N/A

21

Signal ground (nAck)

N/A

22

Signal ground (nFault)

N/A

23

Signal ground (pError)

N/A

24

Signal ground (Data 1)

N/A

25

Signal ground (Data 2)

N/A

26

Signal ground (Data 3)

N/A

27

Signal ground (Data 4)

N/A

28

Signal ground (Data 5)

N/A

29

Signal ground (Data 6)

N/A

30

Signal ground (Data 7)

N/A

31

Signal ground (Data 8)

N/A

32

Signal ground (nInit)

N/A

33

Signal ground (nStrobe)

N/A

34

Signal ground (nSelectIn)

N/A

35

Signal ground (nAutoFd)

N/A

36

Peripheral logic high

Printer


Mouse and Keyboard Ports

Each Onyx2 deskside workstation comes with two keyboard and mouse connectors.

Figure 4-11 shows the location of the connectors and their pinouts.

There are two sets of keyboard and mouse connectors on the rear of the graphics BaseIO panel provided with each Onyx2 system. If your system uses one keyboard and mouse, attach them to the primary keyboard and mouse connector ports. These primary ports are located on the right side of the BaseIO panel.

You can plug the keyboard and mouse cables directly into the BaseIO panel. However, in cases where your monitor, keyboard, and mouse are located away from the system, use the included extension cable. Each system comes with a 24-foot (7.3 m) keyboard and mouse extension cable.

Figure 4-11. Keyboard and Mouse Locations and Pinouts

Figure 4-11 Keyboard and Mouse Locations and Pinouts

Table 4-5 shows the cable pinout assignments for the keyboard port.

Table 4-5. Keyboard Port (6-Pin Mini-DIN) Pin Assignments

Pin

Assignment

1

KEYBOARD DATA

2

(Reserved)

3

GROUND

4

KEYBOARD POWER (+5 V)

5

KEYBOARD CLOCK

6

(Reserved)

Table 4-6 shows the cable pinout assignments for the mouse port.

Table 4-6. Mouse Port (6-Pin Mini-DIN) Pin Assignments

Pin

Assignment

1

MOUSE DATA

2

(Reserved)

3

GROUND

4

MOUSE POWER (+5 V)

5

MOUSE CLOCK

6

(Reserved)


Analog Stereo In and Out (RCA-Type) Ports

Table 4-7 shows the cable pinout assignments for the line-level audio (RCA-type) ports.

Table 4-7. Analog Composite Video Port Pin Assignments

Pin

Assignment

(sleeve)

GROUND

(tip)

Line level audio

You may connect audio equipment to the line-level inputs and outputs using standard shielded RCA type connectors (see Figure 4-12). For best results, always route these analog signal cables away from power cords.

The right channel is color-coded red, and the left channel is white.

Figure 4-12. Analog Stereo Port Locations

Figure 4-12 Analog Stereo Port Locations

Serial Connectors

The Onyx2 deskside system comes with four standard 9-pin serial connectors. The connectors are all male and use a PC-compatible signal assignment. Figure 4-13 shows the connector locations and pin assignments.

The RS-232 standard recommends the use of cables no longer than 50 feet (15.2 meters). This standard should also be applied to RS-422 serial use. Longer runs introduce a greater possibility of line noise occurring. This can affect data transmission and cause errors. For cable runs longer than 50 feet (15.2 meters), use an appropriate extender device.


Note: Do not run cables through areas that are electrically noisy, such as areas where large electric motors, welding apparatus, or X-ray machines operate. Bury outside wiring in conduit to prevent lighting strikes from damaging the system.

Figure 4-13. RS-232/RS-422 Serial Connectors

Figure 4-13 RS-232/RS-422 Serial Connectors

Optical Digital Audio Interface Connectors

Just above serial port two are the single-jack ADAT optical connectors (see Figure 4-14). These ports can be used with multi-track digital audio recording input and output devices.

These connections support optical input and output of eight channels at up to 24 bits and up to 48 Hz sample rates.

Use standard plastic fiber interconnecting cables. You will need two cables; one for input and one for output. The Onyx2 system ships with connector cover plugs over the input and output ports. These must be removed before using the optical connectors. Retain these dust covers for use when shipping or if you discontinue ADAT use.

Figure 4-14. Optical Digital Audio Interface

Figure 4-14 Optical Digital Audio Interface

Loopthrough and Digital Audio Connectors

Figure 4-15 shows the loopthrough and digital audio connectors.

The AES and EBU digital audio connectors support 75-ohm signals at a nominal 1.0 volts (peak-to-peak) signal level. You should use 75-ohm coaxial cable with standard BNC connectors for interconnections (such as with digital video recorders).

Some equipment supporting AES and EBU digital audio signals uses 3-pin XLR connectors that support balanced 110-ohm signals. To successfully interconnect with equipment of this type, install a digital audio “BALUN” adapter at the equipment's XLR connector points. The BALUN adapter connects the 3-pin XLR to a 75-ohm BNC connection. The 75-ohm coaxial cable then connects between the Onyx2 system and the BALUN adapter.


Note: 110-to 75-ohm digital audio BALUN adapters come in male and female versions. You need one of each type when using both the input and output AES and EBU connectors.

Figure 4-15. Loopthrough and Digital Audio Connectors

Figure 4-15 Loopthrough and Digital Audio Connectors

Standard SCSI Connector

A single-ended external 68-pin SCSI connector is provided on the BaseIO panel (see Figure 4-16). This connector supports both Ultra SCSI and SCSI-2 devices. The connector is always single-ended.

Optional additional SCSI ports can be implemented using XIO option boards. See the section “Optional Interfaces” for additional information.

The hyphen preceding a signal name indicates that the signal is low. Note that 8-bit devices that connect to the P-cable leave these signals open: -DB(8), -DB(9), -DB(10), -DB(11), -DB(12), -DB(13), -DB(14), -DB(15), -DB(P1). All other signals are connected as shown in Table 4-8.

Table 4-8. 68-Pin Single-Ended, High-Density SCSI Pinouts

Signal Name

Pin Number

Pin Number

Signal Name

Ground

1

35

-DB(12)

Ground

2

36

-DB(13)

Ground

3

37

-DB(14)

Ground

4

38

-DB(15)

Ground

5

39

-DB(P1)

Ground

6

40

-DB(0)

Ground

7

41

-DB(1)

Ground

8

42

-DB(2)

Ground

9

43

-DB(3)

Ground

10

44

-DB(4)

Ground

11

45

-DB(5)

Ground

12

46

-DB(6)

Ground

13

47

-DB(7)

Ground

14

48

-DB(P)

Ground

15

49

Ground

Ground

16

50

Ground

TERMPWR

17

51

TERMPWR

TERMPWR

18

52

TERMPWR

Reserved

19

53

Reserved

Ground

20

54

Ground

Ground

21

55

-ATN

Ground

22

56

Ground

Ground

23

57

-BSY

Ground

24

58

-ACK

Ground

25

59

-RST

Ground

26

60

-MSG

Ground

27

61

-SEL

Ground

28

62

-C/D

Ground

29

63

-REQ

Ground

30

64

-I/O

Ground

31

65

-DB(8)

Ground

32

66

-DB(9)

Ground

33

67

-DB(10)

Ground

34

68

-DB(11)

Figure 4-16. 68-Pin Single-Ended SCSI Connector

Figure 4-16 68-Pin Single-Ended SCSI Connector

Speaker and Microphone Connections

The Onyx2 BaseIO panel uses a 30-foot (9.1 m), three-connector bundled cable to connect a microphone and a pair of speakers (included with your Onyx2 system).

Figure 4-17 shows the connection points on the rear of the speakers.

Figure 4-17. Cable Connection Locations on the Speakers

Figure 4-17 Cable Connection Locations on the Speakers

The analog speaker connector plugs into the BaseIO board and the other end goes to the analog speaker plug. The analog speaker power connector goes from the BaseIO to the middle plug on the back of the right speaker (see Figure 4-18).

The microphone connector goes from the BaseIO panel and you plug in your (included) microphone at the other end (look for the microphone logo on the connector). Note that there is also a 10-foot (3 m) “speaker only” cable included with your Onyx2 system. This 10-foot cable does not supply a microphone plug and limits where you may place the speaker set.

Figure 4-18. Speaker and Microphone Connections to the BaseIO

Figure 4-18 Speaker and Microphone Connections to the BaseIO

Optional Interfaces

Optional interfaces you may wish to use could include

  • multiple SCSI

  • ATM

  • HIPPI

  • multiple Ethernet

Every deskside system comes ready to be plugged into a standard Ethernet network using an 8-pin RJ-45 style connector.

Optional XIO interface boards install in the rear of the system. You may have up to four optional XIO boards in the Onyx2 deskside workstation.