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Problems with downloading Mon C167

I am using C167CR-FM
I have gotten the board to run programs
previously but I add some code to the program and it compiles but when the monitor downloads it errors after it finishes and will not download the program
any information would be helpful

  • If the monitor did work before then I can see only two possibilities: either there has been a change in the monitor configuration or it's something wrong with the hardware.

  • What has happened to me in the pass is I (or DAVE) changes the usage of port 3. Specifically pins 10 and 11 which are your RS 232 pins. It usually takes a full system board reset to set the pins back to normal.
    Another possibility (which I have also done) is messing up the RAM chips select. One of the ways to determine what you have done is to go into the debugger tab of the target setting window and turn off the "run till main". Then single step thue the asm stuff after the program has been downloaded and see where the system goes off into never Neverland.