Chapter 4 PA-RISC Computer Systems - OpenPA.net

PA-RISC Processors Other PA-RISC processors
� PROgress (PA-RISC) Newsletter - comp.sys.hp 43 Candace Doyle (October 1993: Precision Risc
Organization. Accessed December 2007)
� Winbond, Varian sign deal for thin-film IC process 44 Terho Uimonen (April 1994: Electronic
News. Accessed January 2008 at findarticles.com)
� PA-RISC in a PC box (was: Re: HP’s vision of a low-end 3000) - comp.sys.hp.mpe 45 Stan Sieler
(Februar 1996. Accessed December 2007)
Winbond W90210/215
Shortly after the W89K embedded controllers Winbond introduced more sophisticated PA-RISC processors
in Fall 1997 with the W90K line of embedded controllers. The W90210F still was 32-bit PA-RISC
1.1 but integrated many external I/O components on the chip — DRAM and DMA controllers, a PCI
bridge and various I/O ports. As its predecessor, the W90210F was a level 0 PA-RISC 1.1 implementation
without virtual addressing. It was apparently used in various “Internet appliances” : set-top boxes,
TV sets, DVD players, PDAs, VoIP devices, and for industrial automation. The W90215 is identical
to the W90210 but did not include license rights for the embedded operating system (and was thus
cheaper).
� PA-RISC version 1.1 (third edition) 32-bit
� Level 0 implementation (no virtual addressing): no MMU
� Five-stage pipeline
� One functional unit: one 32-bit integer ALU
� L1 I cache: 4 KB, direct mapped, 32-byte blocks, 256 entries
� L1 D cache: 8 KB, 2-way set-associative, 32-byte blocks, 2×64 entries, write-back
� MAX-1 multimedia extensions (subword arithmetic) for multimedia applications, e.g., MPEG
decoding
� 80486 (Intel) bus interface
� DRAM controller
� ROM/FLASH interface
� DMA controller (2-channel 8-bit)
� PCI bridge
� Two serial ports
� Parallel port
� 33 MHz and 66 MHz clock speeds (?)
� 208-pin PQF package
References
43 http://groups.google.com/group/comp.sys.hp/msg/32de7bed6bae1c42
44 http://findarticles.com/p/articles/mi_m0EKF/is_n2011_v40/ai_15334690
45 http://groups.google.com/group/comp.sys.hp.mpe/msg/3a300f81ddfdf151
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