"Peter C. Wallace" <pcw_at_mesanet.com> said:
> On Sat, 29 Jun 2002, Fred Cisin (XenoSoft) wrote:
>
> > Wouldn't it be EASIER to just design a circuit to do the job, rather
than
> > trying to trace theirs?
> >
> > It is NOT that complicated!
> >
> > The existing FDC deals with drive select, seeking to track, etc.
> > Then the add-on board (such as option board, Apple Turnover, Catweasel,
> > etc.) takes the pulses on the data line and stores them as bits. The
rest
> > is software.
> Actually it seems to me that if you wanted to create a universal
> floppy controller, the whole FDC + bus interface would fit easily in a
<$20
> FPGA (with maybe some small amount of external SRAM). This would also have
the
> advantage that the whole hardware configuration could be changed by
> downloading it from the host if needed for more exotic floppy formats...
Hmm... Good idea.
FDD --> Xilinx FPGA --> FDC
I might have to try that. After I build my EPROM programmer.
Later.
--
Phil.
philpem_at_dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Received on Sun Jun 30 2002 - 12:28:30 BST