Difference between revisions of "LR33020"

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== LR33020 ==
 
== LR33020 ==
  
LR33020 GraphX is a processor designed for X-Terminal systems by LSI Logic. It has a [[R3000]] CPU core, integrated caches, write buffers, memory controllers and dedicated 2D graphics hardware. Other hardware built in is a bitblt coprocessor, DMA channels, 64-bit data path, video FIFO, PS/2 ports, support for ethernet. It supports mono, 2-bit and 4-bit grayscale and 8-, 16- and 32-bit color.
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LR33020 GraphX (LR33K) is a processor designed for X-Terminal systems by LSI Logic. It features:
 +
* [[R3000]] CPU core
 +
* Integrated caches
 +
* Write buffers
 +
* Memory controllers  
 +
* Dedicated 2D graphics hardware as COP2. (PS/2 port too)
 +
* 64-bit data path
 +
 
 +
Other built in hardware include:
 +
* BitBlt coprocessor  
 +
* DMA channels,
 +
* Video FIFO
 +
* PS/2 ports
 +
* Support for ethernet.  
 +
* It supports mono, 2-bit and 4-bit grayscale and 8-, 16- and 32-bit color.
  
 
The processor has probably no MMU or FPU.
 
The processor has probably no MMU or FPU.
 +
 +
The original LSI's [[PMON]] firmware contains some support for this CPU. The ''lr33020.h'' header file looks interesting.
  
 
== Links ==
 
== Links ==
 
* http://203.162.7.79/ieee/pdf/disk_38/392/4763/358_363_The%20LR33020%20GraphX%20proces.pdf
 
* http://203.162.7.79/ieee/pdf/disk_38/392/4763/358_363_The%20LR33020%20GraphX%20proces.pdf
 
* http://203.162.7.79/ieee/pdf/disk_57/442/6840/205_208_The%20architecture%20of%20the%20L.pdf
 
* http://203.162.7.79/ieee/pdf/disk_57/442/6840/205_208_The%20architecture%20of%20the%20L.pdf
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* [http://tekxp-linux.hopto.org/pmwiki/pmwiki.php/Hardware/Hardware Tektronix TekXpess X terminals]
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* http://www.cse.unsw.edu.au/~cs9242/src/mipsL4/src/lib32/libc/cp2supp.S
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* http://www.hotchips.org/archives/hc4/2_Mon/HC4.S3/HC4.3.2.pdf

Latest revision as of 18:04, 2 October 2007

LR33020

LR33020 GraphX (LR33K) is a processor designed for X-Terminal systems by LSI Logic. It features:

  • R3000 CPU core
  • Integrated caches
  • Write buffers
  • Memory controllers
  • Dedicated 2D graphics hardware as COP2. (PS/2 port too)
  • 64-bit data path

Other built in hardware include:

  • BitBlt coprocessor
  • DMA channels,
  • Video FIFO
  • PS/2 ports
  • Support for ethernet.
  • It supports mono, 2-bit and 4-bit grayscale and 8-, 16- and 32-bit color.

The processor has probably no MMU or FPU.

The original LSI's PMON firmware contains some support for this CPU. The lr33020.h header file looks interesting.

Links