Re: Did Commodore cheat with the quad density floppies?

On 04/01/2019 19:04, afachat@gmx.de wrote:
>
> I  think you're mixing up FM and MFM. FM needs one or two transitions per bit
> (one for 0-bits, two for 1-bits).

Actually I was obviously mixing up runs of 1's & 0's.

MFM reduces the number of sequential 1's, which is more important than 
the number of sequential 0's in ancient floppy disk hardware.

I thought it was obvious when I say 2 transitions, that it's the space 
for two transitions. The lack of a transition takes the same space as a 
transition.