HP-71 Compu-LS module

[J-F Garnier]

(03-21-2017 01:22 PM)twa14 Wrote:  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 think the main reason may be that the manufacturer didn't want to impose the purchase of the Math ROM to the potential customers. He could have designed the code to use the Math ROM if present, but it would have complicate the code, and the COMPU ROM is already almost full (33 bytes left).

The same applies to the HP Circuit Analysis ROM, it would have benefit of the Math ROM matrix function too.

But don't expend tremendous speed improvement with the Math ROM, it will avoid some code overhead, but the basic math operations will be the same. On the other hand, the matrix functions of the Math ROM are more accurate than equivalent Basic code. I don't know if this is important in that case.

J-F