This chapter provides an overview of the 200/250 MHz IP19 CPU board.
The 200/250 MHz IP19 is virtually identical to previous revisions of the IP19 board, with the exception of the features listed in the next section. The 200 MHz IP19 is currently available in 2 and 4 CPU versions; the 250 MHz IP19 is available in 1, 2, and 4 CPU versions.
The 200/250 MHz version of the IP19 board contains the following new features compared to previous versions of the IP19:
a 200 or 250 MHz internal clock speed
a 4 MB secondary cache per CPU
two cache address jumpers per CPU (to accommodate the 4 MB cache)
a new EAROM
The R4400 can issue up to 1 floating point instruction every other (internal) clock tick. The PEAK MFLOP rating for a single R4400 chip running at 200 MHz is 100 MFLOPs. Table 1-1 lists the PEAK MFLOP ratings for various IP19 boards:
Table 1-1. Comparison of PEAK MFLOPs for 100, 150, 200, and 250 MHz IP19 Boards
Board | CPU Type | Clock Speed (Internal) | PEAK MFLOPs Per Board |
|---|---|---|---|
IP19 | R4400 | 100 MHz | 100 MFLOPs |
IP19 | R4400 | 150 MHz | 150 MFLOPs |
IP19 | R4400 | 200 MHz | 200 MFLOPs |
IP19 | R4400 | 250 MHz | 250 MFLOPs |
Power consumption is approximately 144 watts per board. Heat dissipation is fairly close to the 150 MHz version of the IP19 board.
No additional power bricks (power boards) and off-line switchers are required for systems that are being upgraded from previous versions of the IP19 to the 200/250 MHz version. Also, there are no additional site power requirements as a result of the upgrade.
The 200/250 MHz version of the IP19 board can be used in all CHALLENGE, Onyx, and Reality Station systems.
IP19 boards with different clock speeds and cache sizes can be mixed in a CHALLENGE or Onyx chassis provided it meets the following requirements:
The system is running IRIX 5.3.
Note: Prior to IRIX 5.3, cache management code in the IRIX OS demanded that all the processors have the same cache size. In IRIX 5.3, a per processor strategy permits the mixing of 1 and 4 MB cache. For additional background information see FIBs 458 and 501. The system uses the IP19s listed in Table 1-2.
Table 1-2. IP19 Boards That Can Be Mixed in a CHALLENGE or Onyx System
IP19 Board Type
Valid Part Numbers
One CPU, 100 MHz
030-0642-002 or later
Two CPUs, 100 MHz
030-0249-013 or later
Four CPUs, 100 MHz
030-0250-013 or later
One CPU, 150 MHz
030-0525-004 or later
Two CPUs, 150 MHz
030-0374-009 or later
Four CPUs, 150 MHz
030-0375-009 or later
Two CPUs, 200 MHz
030-0652-001 or later
Four CPUs, 200 MHz
030-0653-001 or later
One CPU, 250 MHz
030-0806-001 or later
Two CPUs, 250 MHz
030-0805-001 or later
Four CPUs, 250 MHz
030-0804-001 or later
 | Caution: Do not mix IP19s manufactured with fab P/N 034-0345-002 with IP19s manufactured with previous fabs (P/N 034-0250-002 or 034-0250-003) in the same system. This may cause the system to hang or in some cases cause a CMOS chip on the board to overheat and possibly smoke. |
| Note: If you are intermixing IP19 CPUs with different clock speeds you also need to install patch 676. This patch enables the IRIX 5.3 kernel to support mixed IP19 speeds and cache sizes configurations. Consult the product release notes for additional information. |
The 200 MHz IP19 board works in any CHALLENGE, Onyx, or Reality Station system running IRIX 5.2 or later. The 250 MHZ IP19 board requires IRIX 5.3.
| Note: If you are running the Audio/Serial Option (ASO or "SAMz") with an IP19/250 MHz board, you must install the ASO software version 1.1 or later to support this configuration. Consult the product release notes as needed. |
The IP19/250 upgrade requires IO4 PROM version 3.16 or higher. Patch 900 on the IP19/250 upgrade CD contains IO4 PROM revision 3.17. This patch must be installed for all IP19/250 upgrades.
The IP19/200 MHz upgrade is less restrictive and can operate with IO4 PROM version 3.14 or higher.