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uVision Debugger problem with MX2?

David Bevin

I'm developing for the Philip 8xC51MB2 using the latest Keil tools but when I use the uVision debugger (simulator) I get the following problem:-

In "Extended Call Return Mode" ECRM = 1, the simulator appears to handle a RET instruction incorrectly.

The disassembly calls the following library function and pushes a 3-byte address onto the stack:

ECALL  C?OFFXADD(0x8002C6)

the C library function then calls "RET" and only 2 bytes are popped off the stack.

Is this a problem with the simulator or am I doing something incorrectly?