4 Feb
2007
4 Feb
'07
4:59 p.m.
Tony Duell wrote:
> I thought every PC (maaning IBM compatible) did that. The floppy system
> in the PC. XT and ZT has a DMA channel associated with it. You ask it to
> read some secotyors from the current track, it does so and transfers the
> data into memory, then gives you an iterrupt when it's done.
It might be stretching the term "compatible", but IIRC, the Peanut
didn't use DMA for disk access.
On a side somewhat related topic, how many disk controllers had their
own track buffer (like hard disk controllers)? The Microsolutions
Backpack is the only one that I can think of for the PC. The
C64/128 drives probably had them, also.
Cheers,
Chuck