HP / Silicon Graphics 030-1771-005 IO9 Base I/O Board

The HP/Silicon Graphics 030-1771-005 IO9 Base I/O Board is a full-length PCI interface card that serves as the primary input/output controller in SGI graphics workstations and compute systems. It manages peripheral communication, video composition, and system synchronization across compatible SGI platforms. The board occupies PCI bus 1, slot 1 and supports card speeds up to 100 MHz.

## Technical Specifications

• **Manufacturer:** HP / Silicon Graphics
• **Model:** 030-1771-005
• **NSN:** 5998-01-593-7076
• **Form Factor:** Full-length PCI board
• **PCI Bus Support:** PCI-X slots, up to 100 MHz card speed
• **Video Input Capacity:** Up to four DVI Single-Link digital inputs
• **Video Output:** One analog output
• **Sync Connectors:** DB9 Stereo Sync, Advanced Csync, GENLOCK 1
• **Additional Ports:** Swap-Ready Port, internal IDE (DVD-ROM), internal SCSI (hard disk), external SCSI, real-time interrupt in/out (RTI), 10/100BaseT Ethernet (RJ45)

## Key Features

The IO9 board functions as a graphics compositor, accepting two, three, or four DVI Single-Link digital video inputs and combining them into a single analog video output. This capability enables enhanced graphics performance in multi-display configurations. Integrated sync connectivity—including stereo sync, advanced chroma sync, and GENLOCK support—ensures precise timing for professional graphics applications. The board includes both internal and external storage interfaces, supporting IDE DVD-ROM drives and SCSI hard disk arrays. Real-time interrupt connectors provide deterministic timing for time-critical workloads. Ethernet connectivity enables network integration at 10/100 Mbps.

## Typical Applications

The IO9 board serves as the standard host system boot module in SGI graphics systems. It is deployed in visualization workstations requiring multi-input video composition and in compute/graphics module configurations demanding coordinated I/O management.

## Compatibility & Integration

The IO9 is specified for Silicon Graphics Onyx4 UltimateVision, Onyx InfinitePerformance, Tezro visual workstations, and G2/G2N bricks, as well as SGI Onyx 350 compute/graphics modules and SGI 3000 series V-bricks. The IO10 board provides a successor option with SATA interfaces and Gigabit Ethernet, though IRIX boot from SATA on IO10 has known limitations.