Chapter 4 PA-RISC Computer Systems - OpenPA.net

PA-RISC Chipsets Elroy
� RS-232 port
� Supports both 3.3 V and 5.0 V PCI operation
� 208-pin PQFP package
� Dino chip numbers: 1FC3-0004
Used in
� A180, A180C
� B132L, B132L+, B160L, B180L+
� C132L, C160L, C160, C180, C200, C240, C360
� J2240
� RDI PrecisionBook 132, 160, 180
References
1. DINO ERS (External Reference Specification) — A GSC-to-PCI Bridge 70 Hewlett-Packard Company
(February 1997, Revision 3.0)
2. Dino 3.1 (1FC3-0004) Errata Listing 71 Hewlett-Packard Company (September 1997)
2.5.9 Elroy
Elroy is a PCI bus bridge that attaches one PCI bus to one or more I/O ropes. Common configurations
are one 250 MB/s I/O rope for one “Turbo” PCI bus (can have multiple slots or attach multiple I/O
devices) or two I/O links (about 500 MB/s) for one Twin Turbo bus.
Elroy was often used with the Astro memory and I/O controller.
Features
� Peak bandwidth of up to 500 MB/s
� Attaches to one or more I/O ropes
� Provides one PCI bus
� Multiple Elroys can be used in a single system
� Support for Turbo and Twin Turbo slots — attached via one or two links respectively
� Support for PCI 2.1, 1X, 2X and 4X bus
� PCI data width of 32 or 64 bit
� PCI clock of 33 or 66 MHz
70 http://ftp.parisc-linux.org/docs/chips/dino_ers.pdf
71 http://ftp.parisc-linux.org/docs/chips/Dino_3_1_Errata.html
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