Immunity Debugger - Memory Breakpoint

Question

Is there a way to stop execution each time some memory address is accessed?

Answer 1

Yes

For a memory access breakpoint¹, just right click the desired address > Breakpoint > Memory, on access:

The same applies to values in the hex dump:

1: A breakpoint on access will break whenver the address is read, written or executed. An execution breakpoint will never break on read/write.