RE: My finding about the 90x0 ROMs

Hallo allemaal,
 

> It might be interesting to compare these parts of
> the code between the two versions for differences.

I have done that. 
- Both ROMs use the same variables with one exception (see later).
- Until the format routine the source code is the same.
- After the format routine the source code is the same as well with one
exception: one extra single STA instruction $F295 in the C version and I
haven't any idea why it has been added.

So the main difference is the format routine. Both version are roughly
the same with one important exception: the B version doesn't use the
variable FormatHead. This is the variable used to format every sector
times the number of heads. I already mentioned that this was an overkill
because the headnumber was already embedded inside the sector number.


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