[jcmeyrignac]

Here are a few other 6809 FP libraries: https://gitlab.com/dfffffff/fpo9 https://github.com/spotlessmind1975/ugbasic/blob/main/ugbc/s...

If I remember correctly, the ROM of MO6/TO7 contain also a fast implementation, but I was not able to find a disassembly.

[spc476]

The first link is to the MC6839, which is covered already in the blog post. The second link is the Lennart Beschop's floating point routines, which is what the post is about.

> ROM of MO6/TO7

Do you mean the MC6839 here? Or something else?

[jcmeyrignac]

The MO5/MO6/TO7 were based on the 6809: https://en.wikipedia.org/wiki/Thomson_MO6 https://en.wikipedia.org/wiki/Thomson_TO7 Since I met the engineers, I believed that they implemented their own Basic, but I might be wrong.