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get in- and external software-debuggable

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Author
Thomas Meister
Posted
24-Feb-2005 09:16 GMT
Toolset
C51
New! get in- and external software-debuggable
I want to modify my uc-board to make both internal and external memory software-debuggable. I thought of a von Neumann architecture but dont know how to design it correctly.

I planed to get the different modes switchable (monitor-program for downloading, Run external and Run internal). All of these modes can be selected by !PSEN and !EA signals.
           !PSEN   !EA
monitor =    0      1
run ext =    1      0
run int =    1      1


I do now just wonder what will happen when im setting both !PSEN and
!EA to 0...

Maybe someone of you can help me out.


thanks in advance

-Thomas
Read-Only
Author
Jon Ward
Posted
24-Feb-2005 14:03 GMT
Toolset
C51
New! RE: get in- and external software-debuggable
ISD51 is an in-system debugger that allows you to debug target systems without modification. Maybe that's an easier alternative?

Jon

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