I showed an example in Keil C51. It should be very easy to translate that to assember. It should also be easy to adapt the matrix size. If you cannot do that translation then I would have to ask "Why are you trying to be a programmer?". Maybe what you need to do is to take it upon yourself to be a little bit more industrious. You could download the free copy of the evaluation version of the Keil C51 compiler. Then use the µVision II IDE to open a file with the C source code, add a #pragma SRC to the top of the file, and then compile it. Keil C51 will spit out an assembly language equivalent of the C code.

If that is even too much work then your going to have to come up with money to pay to have the exact routine for your needs to be written.

Michael Karas