Indirect DM/EM Addressing Error

What does A295.09 mean?

This flag indicates an Indirect DM/EM Addressing Error. This error occurs when an indirect address calculation for DM (Data Memory) or EM (Expansion Memory) results in an invalid, non-existent, or out-of-range memory address. This prevents proper data access.

• Indirect addressing calculation resulting in an out-of-range DM or EM address pointer.
• Incorrect base address or offset value used in the indirect addressing scheme.
• Corruption of data words used for indirect address calculation, leading to an erroneous target address.

Click steps to track your progress.

1. 1

   Verify the values used for indirect addressing pointers and offsets in DM and EM areas.

2. 2

   Ensure that all calculated indirect addresses fall strictly within the valid and allocated range of DM and EM areas.

3. 3

   Implement range checks on calculated addresses before executing indirect memory access instructions.