HP-71 Compu-LS module

[twa14]

Its a survey\network adjustment program like STAR*NET. I bought the module in 1988. For some reason lost in time the module does not use the MATH rom. The matrix functions are ideal for speeding up the calculations. I read about the module first in the CHHU journal. A land surveyor (lives in New Mexico) tested it and compared the output with a mainframe program of that time and reported that the COMPU module gave exactly the same output, unfortunately it took two weeks to run! The MATH rom would have solved that problem a lot faster. Since then I have been thinking of doing this by editing the BASIC code to use the MATH rom. I have the manuals, if anyone wants a copy I will scan them and email