MON51: MON51 Stack Requirements

Information in this article applies to:

• C51
• Keil MON51 monitor

QUESTION

What are the worst-case stack requirements of the Keil MON51 monitor?

ANSWER

MON51 uses at most 2 bytes of stack space.

When you set a breakpoint, the monitor actually replaces the instruction where you have set the breakpoint with an LJMP into the monitor breakpoint processor. The monitor then swaps internal DATA memory out to XDATA. The monitor is then free to use as much DATA memory as it needs without affecting the memory used by your target program. When the monitor is ready to start running your target program again, the DATA is swapped back in.

SEE ALSO

• MON51: DATA/IDATA usage

Last Reviewed: Thursday, February 25, 2021