Peripheral Connections

Connectors on the chassis

The backplane which is in the chassis holds the connectors for SCSI and the parallel port.

SCSI

There are three internal SCSI connectors inside the chassis for the internal drives. The SCSI bus is terminated on that end. The other end of the bus is the external connector, which is a big centronix-style one. This end must be terminated, otherwise you will get problems.

Parallel port

The parallel port uses and DB25 connector. It is capable auf unidirectional transfers and special bidirectional transfers. Quote from the hardware developers handbook: 'SGIPP - SGI Parallel Port This port mode supports bidirectional transfers. It was designed to support a particular Ricoh parallel port scanner.'.

Connectors on the CPU board

Audio

The audio subsystem is controlled from an dedicated DSP, the Motorola 56001 at 20MHz. There are five 3.5 mm stereo connectors. From top to bottom the connectors are: Mono Microphone Input (+/- 0.47dB from 20Hz to 20KHz frequency Response, 2KOhm Impedance), Stereo Headphone Out (+/- 0.78dB, 16 Ohms), Stereo Line In (+/- 0.43dB, 5kOhm), Stereo Line Out (+/- 0.30dB, 600 Ohms), Digital In/Out - AES3-id or IEC-958 and Mono Speaker - built into front of system (2.6 Zoll, 88dB/W, 3W max, 1.5W nominal).

Serial Ports

The two serial ports uses mini-din style connectors and are capable of 38400bps. For a pinout see the pinout page at www.irisindigo.com. In my experience, adapters to DB9 are easy to get.

Keyboard/Mouse

The keyboard connects to a PS/2 style port, but it is incompatible to PS/2. The mouse connects to the keyboard.

Ethernet

The ethernet port is a standard AUI port, use a transceiver to connect to your network.

Connectors on the graphics board

Server

No connectors.

Entry

One DB15 VGA output and one 13W3 Output. Both delivers the same image.

Express

The Express boards have a 13W3 Output to the Monitor, a Genlock input and a Stereo Output for 3D glasses. The cheapest 3d goggles seems to be the Crystal Eyes.