7730 addressing question

[David Cooley]

At 11:24 AM 6/29/99 -0400, you wrote:
>Got a question.....not a critical one, .....I'm hacking a v6 730 eprom and
>I noticed some jump instructions to an address range outside the Eprom
>around $5100.  I realize that some of the addressing can be confusing
>because of the way the eprom reader put the address range compared to the
>computer, but that is not the case here.  It is actaully literally calling
>the $5100 range.  The Eprom goes from $8000 to $FFFF.  My question is:  are
>they running the 68hc11 in a mode where it has some internal subroutines
>and memory,  or is somewhere else in the program some subroutines being
>written into this space and then executed.   Has anyone seen this before?

The DELCO/GM calibration console (Their real time tuning box) is addressed
through $5xxx
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David Cooley N5XMT Internet: N5XMT at bellsouth.net 
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068 
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