I have now assembled a new BIOS with support for the 788K 80 track GEMQDDS disk format and have created the 80 Track bootable disk images with some python. I have also added some
cpmtools disk definitions so that the images can be manipulated, checked files added/removed etc.
The full story is here with some disk images should you be following the saga.
https://glasstty.com/wiki/index.php/...e_From_Scratch
Needless to say I am very grateful for all of the information that is currently on this thread. Of course what I could do with now is a disk formatter for the 80 Track 788K disks so that I can format the physical disk that is B:. Theres alway something...