Date   : Sat, 31 Jul 2010 00:05:52 +0100
From   : jumbos.bazzar@... (Mark Haysman)
Subject: Why did Acorn ADFS only allow 640KB on a floppy?

> (For that matter, why did no one push it to 800KB in a 'normal' BBC
> filing system? The Master FDC at least must have been capable of it
> because the Master 512 used an 800KB format.)

The 177x chip is absolutely capable of 800k, as it's used in the all the 
Pre-A5000 arcs which can do the 800K ADFS format.

Mark.