Difference between revisions of "LR33020"

From LinuxMIPS
Jump to navigationJump to search
Line 25: Line 25:
* [http://tekxp-linux.hopto.org/pmwiki/pmwiki.php/Hardware/Hardware Tektronix TekXpess X terminals]
* [http://tekxp-linux.hopto.org/pmwiki/pmwiki.php/Hardware/Hardware Tektronix TekXpess X terminals]
* http://www.cse.unsw.edu.au/~cs9242/src/mipsL4/src/lib32/libc/cp2supp.S
* http://www.hotchips.org/archives/hc4/2_Mon/HC4.S3/HC4.3.2.pdf

Latest revision as of 18:04, 2 October 2007


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.