[geeks] PowerPC 850 knowlege sought

Jay Monkman jtm-geeks at smoothsmoothie.com
Sun Jan 25 17:41:49 CST 2009


On Sun, Jan 25, 2009 at 05:45:19PM -0500, der Mouse wrote:
> Now that you and others have said what you said and assorted variations
> on it, the remaining problem is that I don't know what the chip I'm
> dealing with has for "internal memory mapped registers" - that is, if
> the IMMR is (say) 0x01230000, what's in the space at 0x01230000?
> Presumably this will depend on exactly which chip I'm dealing with; I
> really hope the indications I found that this hardware uses an
> 850-cored chip are accurate.  Maybe I should open it up again for
> another look inside....

The User's Manual should tell you all that. The lower 16 bits of the
IMMR contain a device ID and rev number also.

http://www.freescale.com/files/product/doc/MPC850UM.pdf



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