Is it possible to read the PC (Program Counter) ?

BHARAT MESHWANI

Prodigy 160 points

I use 6455 DSP and want to just read (and not modify) the program counter. I tried the following:

#include <c6x.h>
...
unsigned int temp;
temp = PCE1;

....

Is this the right way to do it? I don't get the exact value of PC at the line. It is slightly off. Thanks

Bharat Meshwani

over 14 years ago

George Mock over 14 years ago

TI__Guru**** 249900 points

That's because you are getting the address of the fetch packet which contains the instruction referring to the PC. Read about it in the C64 CPU book. Search for PCE1.

I cannot think of a better solution.

Thanks and regards,

-George

BHARAT MESHWANI over 14 years ago in reply to George Mock

Prodigy 160 points

Thanks George, That was my guess too, but just wanted to confirm it.

regards

Bharat

Processors

Processors forum

Is it possible to read the PC (Program Counter) ?