The DecIntact TP product is written in Macro-32. My job was to use the Macro compiler to convert the Macro-32 code to Alpha processor object modules. To port the code, it was necessary to correct code sequences that were not legal in the Alpha instruction set. After each of the ~90 modules were compiled, it was necessary to integrate the changes back into the VAX/VMS source and run the regression test suite to make sure the code still performed identically to the original product.