SGI IRIS 2000
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| Back panel of the IRIS 2400 Turbo cabinet (SGI 68020 course workbook). No free photograph of an IRIS 2000 was found. | |
| Specifications | |
|---|---|
| Manufacturer | Silicon Graphics, Inc. |
| Type | Graphics terminal and workstation |
| Released | 1985[1] |
| Discontinued | End of production formalised November 1989[2] |
| CPU | Motorola 68010 at 10 MHz on the PM2 board; Turbo models: 68020 at 16 MHz on the IP2 board[3] |
| Memory | PM2M1 Multibus memory boards; Turbo models: IM1 boards, 2 to 16 MB[3] |
| Storage | None on the 2000 and 2200; ST-506 disks on the 2300 and 2400; SMD disks on the 2500[4][3] |
| Display | — |
| Sound | — |
| Graphics | GF2, UC4, DC4 and BP3 boards; Geometry Engines at 6 MHz, 8 MHz from August 1985[4][3][5] |
| Expansion | Multibus card cage[3] |
| OS / Firmware | GL2 UNIX: release 2 (non-Turbo), release 3 (Turbo); GL2-W2.5 is the last known release for the non-Turbo models[3][4] |
| Predecessor | SGI IRIS 1000 |
| Successor | SGI IRIS 3000 |
The SGI IRIS 2000 series is the second range of Silicon Graphics' Motorola 680x0 graphics terminals and workstations, and the first with the GL2 graphics hardware that all later 680x0 IRIS machines use.[5][3] The original models have the 10 MHz 68010 PM2 processor board on the Multibus; from late 1985 a Turbo option replaced it with the 16 MHz 68020 IP2 board and IM1 memory on a private bus, which makes a Turbo machine much closer to an SGI IRIS 3000 than to a non-Turbo 2000.[3][4] Because of the different processors, Turbo and non-Turbo machines cannot run each other's object code.[4]
Models
[edit | edit source]| Model | Type | Processor | Disk |
|---|---|---|---|
| 2000 | Terminal | PM2 | None |
| 2200 | Terminal | PM2 | None |
| 2300 | Workstation | PM2 | ST-506 |
| 2400 | Workstation | PM2 | ST-506 |
| 2500 | Workstation, rack-mounted | PM2 | SMD |
| 2300T, 2400T | Turbo workstations | IP2 | ST-506 |
| 2500T | Turbo workstation, rack-mounted | IP2 | SMD |
[4][3] SGI's owner's guide for the 3000 series names the 2300T as the equivalent of the IRIS 3010 and the 2400T as the equivalent of the 3020.[6] The 2500 and 2500T are built into a 6 ft (1.8 m) 19-inch rack, with room for two SMD drives at the bottom and the electronics chassis in the upper half.[4]
History
[edit | edit source]The series came out in 1985.[1] The first machines had Geometry Engines running at 6 MHz; from August 1985 SGI shipped a faster graphics option with 8 MHz engines under the same model numbers, and offered existing owners upgraded GF2 boards.[3][5] The Turbo option followed in autumn 1985.[3] SGI fitted it as an upgrade by swapping the processor and memory boards, reformatting and repartitioning the disk and installing the new operating system; Levine confirms this for the 2400.[4] SGI said it had sold more than 3500 IRIS 2000 and 3000 systems, and formalised the end of production of the 2000 series in November 1989.[4][2]
Hardware
[edit | edit source]Processor and memory
[edit | edit source]Non-Turbo machines have the PM2 board and PM2M1 Multibus memory, with an optional Sky SKYFFP-M-03 floating-point board based on the Weitek 8440A. Turbo machines have the IP2, IM1 memory boards of 2 or 4 MB (2 to 16 MB in all) and an optional FP1 board. The two sets of memory and floating-point boards cannot be mixed.[3][4]
Graphics, networking and disks
[edit | edit source]The graphics boards are the GF2 frame buffer, UC4 update controller, DC4 display controller and BP3 bitplanes, the same set as in the 3000 series.[4] Networking is on an Excelan EXOS/201 Ethernet board.[4] The 2300 and 2400 have ST-506 drives on the Qualogy (DSD) 5217 controller, and the 2500 SMD drives on the Interphase 2190.[5][4]
Power and monitor
[edit | edit source]The 2400 has an LM-54 power supply. When a 2400 is upgraded to a 2400 Turbo, SGI adds a second supply, an LM-11, because the LM-54 alone cannot supply all the options; the LM-11 can only be paralleled with an LM-54.[7] The standard monitor was 60 Hz non-interlaced.[4] SGI's course notes that the 2400 Turbo's monitor differs from the 30x0 monitors: its line termination is set by switches on the back panel.[8]
Maintenance and repair
[edit | edit source]- SGI IRIS 2000 General Maintenance – power supplies, Turbo upgrade, memory boards, configuration switches, the 2500 rack
- SGI IRIS 2000 Troubleshooting Guide – SGI technical aids for the 2000 series, start-up and boot problems
- SGI IRIS 2000 Capacitor Replacement Guide – what is known about the capacitors
The Turbo models share their boards and most procedures with the 3000 series; see the SGI IRIS 3000 General Maintenance and SGI IRIS 3000 Troubleshooting Guide.
Documentation
[edit | edit source]- IRIS Workstation Course, 68020 Based, Student Workbook part 2 (2400 Turbo component location, spare parts, technical aids) – File:SGI IRIS Workstation Course 68020 Based Student Workbook Part 2.pdf
- IRIS Series 3000 Owner's Guide (007-5220-030), which also covers the 2000 Turbo models – File:SGI IRIS Series 3000 Owner's Guide (007-5220-030).pdf
- IRIS 3000 Series Workstation Differences (field-service course) – File:SGI IRIS Series 3000 Workstation Differences Course.pdf
Related pages
[edit | edit source]- SGI IRIS 1000
- SGI IRIS 3000
- SGI IRIS 2000 General Maintenance
- SGI IRIS 2000 Troubleshooting Guide
- SGI IRIS 2000 Capacitor Replacement Guide
References
[edit | edit source]- ↑ 1.0 1.1 "SGI IRIS", Wikipedia, revision of 14 June 2026, en.wikipedia.org/wiki/SGI_IRIS.
- ↑ 2.0 2.1 Gerhard Lenerz, "IRIS 3000", sgistuff.net, sgistuff.net/hardware/systems/iris3000.html (retrieved 22 October 2026). History: November 1989.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 Gerhard Lenerz, "IRIS 2000", sgistuff.net, sgistuff.net/hardware/systems/iris2000.html (retrieved 22 October 2026). Models, history, PM2 and IP2, memory, floating point, graphics, operating system.
- ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 Jonathan Levine, "Silicon Graphics IRIS 2000/3000 FAQ", revisions of May 1993 to June 1994, sections 1, 2.2, 4.2.1, 4.4.1.7 and 5.1, bitsavers.org/pdf/sgi/iris/IRIS_FAQ.txt.
- ↑ 5.0 5.1 5.2 5.3 R. Stricklin, "WTB: SGI (MIPS architecture) Systems", rescue mailing list, 26 May 2010, bitsavers.org/pdf/sgi/iris/bear_sgi_may2010.txt.
- ↑ Silicon Graphics, IRIS Series 3000 Owner's Guide, version 3.0, 007-5220-030, 1987, section 1.2, p. 1-2 (File:SGI IRIS Series 3000 Owner's Guide (007-5220-030).pdf).
- ↑ Silicon Graphics, IRIS Workstation Course, 68020 Based, Student Workbook part 2, lesson 5, "Power compartment component location", p. 6 (File:SGI IRIS Workstation Course 68020 Based Student Workbook Part 2.pdf).
- ↑ Silicon Graphics, IRIS 3000 Series Workstation Differences (field-service study guide), lesson COMP1, step 5, p. 5 (File:SGI IRIS Series 3000 Workstation Differences Course.pdf).