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54 lines
1.5 KiB
Text
54 lines
1.5 KiB
Text
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By Thomas.Lange@corelatus.se 2003-10-06
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----------------------------------------
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DbAu1000 is a development board from AMD containing
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an Alchemy AU1000 with mips32 core.
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Limitations & comments
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----------------------
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I assume that you set board to BIG endian!
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Little endian not tested, most probably broken.
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I named the board dbau1x00, to allow
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support for all three development boards
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some day ( dbau1000, dbau1100 and dbau1500 ).
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I only have a dbau1000, so all testing is limited
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to this board!
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The board has two different flash banks, that can
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be selected via dip switch. This makes it possible
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to test new bootloaders without thrashing the YAMON
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boot loader deliviered with board.
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Ethernet only supported for mac0.
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Pcmcia only supported for slot 0, only 3.3V.
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Pcmcia IDE tested with Sandisk Compact Flash and
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IBM microdrive.
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###################################
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######## NOTE!!!!!! #########
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###################################
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If you partition a disk on another system (e.g. laptop),
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all bytes will be swapped on 16bit level when using
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PCMCIA!!!!
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This is probably due to an error in Au1000 chip.
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Solution:
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a) Boot via network and partition disk directly from
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dbau1x00. The endian will then be correct.
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b) Partition disk on "laptop" and fill it with all files
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you need. Then write a simple program that endian swaps
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whole disk,
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Example:
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Original "laptop" byte order:
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B0 B1 B2 B3 B4 B5 B6 B7 B8 B9...
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Dbau1000 byte order will then be:
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B1 B0 B3 B2 B5 B4 B7 B6 B9 B8...
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