Re: Did Commodore cheat with the quad density floppies?

----- Original Message ----- 
From: "smf" <smf@null.net>
To: <cbm-hackers@musoftware.de>
Sent: Tuesday, January 08, 2019 6:57 PM
Subject: Re: Did Commodore cheat with the quad density floppies?


> On 08/01/2019 22:22, Mike Stein wrote:
>> Sorry; of course within the limitations of the head dimensions HD controllers generally could indeed support DD media. What I was thinking of was the drive speed; instead of switching speed on dual-speed drives most controllers just emulated the slower speed by changing the transfer rate.
> 
> "As to mixing drive types, most normal PC controllers were either low 
> density (DD/QD) or high density, but rarely both;"
> 
> I'm pretty sure you could have a low density drive and a high density 
> drive & it would adjust the transfer rate as required.
------------- 
Yes; I think that's sort of what what I said in my reply to Mia:

"HD controllers generally could indeed support DD media... instead of switching speed on dual-speed drives most controllers just emulated the slower speed by changing the transfer rate."