[ECOS] Question about system bus

Lewin A.R.W. Edwards larwe@larwe.com
Wed Jun 20 11:02:00 GMT 2001


>while writing to the external IO bank0 I can get CS and while reading I
>can't get CS  why?

I haven't been following this thread, so excuse me if this has already been 
mentioned, but if your CPU has Dcache then it should be disabled for this 
I/O range; check the MMU tables.


-- Lewin A.R.W. Edwards
Embedded Engineer, Digi-Frame Inc.
Work: http://www.digi-frame.com/
Tel (914) 937-4090 9am-6:30pm M-F ET
Personal: http://www.larwe.com/ http://www.zws.com/

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though checkered by failure, than to rank with those poor spirits who 
neither enjoy much nor suffer much, because they live in the gray twilight 
that knows not victory nor defeat."
(Theodore Roosevelt)



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