
I've updated DiagROM to build 2 versions. One 256K (labelled STE but its not really exclusively that) and one for STFM (labelled ST).
https://github.com/terriblefire/diagrom ... master/bin
"STE" version is 256K, has version $0206 and has a base of $E00000
"ST" version is 192K, has version $0104 and has a base of $FC0000
Its trivial to add more configurations. Any code that anyone wants in here i'm happy to add.