README 1.5 KB

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  1. By Thomas.Lange@corelatus.se 2003-10-06
  2. ----------------------------------------
  3. DbAu1000 is a development board from AMD containing
  4. an Alchemy AU1000 with mips32 core.
  5. Limitations & comments
  6. ----------------------
  7. I assume that you set board to BIG endian!
  8. Little endian not tested, most probably broken.
  9. I named the board dbau1x00, to allow
  10. support for all three development boards
  11. some day ( dbau1000, dbau1100 and dbau1500 ).
  12. I only have a dbau1000, so all testing is limited
  13. to this board!
  14. The board has two different flash banks, that can
  15. be selected via dip switch. This makes it possible
  16. to test new bootloaders without thrashing the YAMON
  17. boot loader deliviered with board.
  18. Ethernet only supported for mac0.
  19. Pcmcia only supported for slot 0, only 3.3V.
  20. Pcmcia IDE tested with Sandisk Compact Flash and
  21. IBM microdrive.
  22. ###################################
  23. ######## NOTE!!!!!! #########
  24. ###################################
  25. If you partition a disk on another system (e.g. laptop),
  26. all bytes will be swapped on 16bit level when using
  27. PCMCIA!!!!
  28. This is probably due to an error in Au1000 chip.
  29. Solution:
  30. a) Boot via network and partition disk directly from
  31. dbau1x00. The endian will then be correct.
  32. b) Partition disk on "laptop" and fill it with all files
  33. you need. Then write a simple program that endian swaps
  34. whole disk,
  35. Example:
  36. Original "laptop" byte order:
  37. B0 B1 B2 B3 B4 B5 B6 B7 B8 B9...
  38. Dbau1000 byte order will then be:
  39. B1 B0 B3 B2 B5 B4 B7 B6 B9 B8...