[Coco] COCO FPGA

[msmcdoug at iinet.net.au]

I've used FATFs before, it was trivial to port being in C.
 

----- Original Message -----
From: "CoCoList for Color Computer Enthusiasts" 
To:"CoCoList for Color Computer Enthusiasts" 
Cc:
Sent:Mon, 26 Dec 2011 20:41:37 +1100
Subject:Re: [Coco] COCO FPGA

 On 26/12/2011 8:21 PM, Mark McDougall wrote:
 > On 26/12/2011 3:32 PM, Frank Pittel wrote:
 >
 >> I can get 2gig SD cards here for $4 so I don't mind wasting even a

 >> lot of
 >> space but a 2gig card for 4 180K floppies is a bit to much waste!!
 >
 > I don't think anyone here would propose using an entire SD card for
4 
 > floppy images. It would be almost as painful as using actual floppy

 > drives.
 >
 > I would propose that a FAT-formatted SD with floppy disk images,
and a 
 > mechanism for 'mounting' the images would be the most sensible 
 > solution by far. Even using the HDBDOS 255-drive mechanism would be
a 
 > vast improvement (and as I mentioned, already implemented
(read-only) 
 > on my Coco).
 >
 > I'm sure Gary has something similar up his sleeve...
 >
 > Regards,
 >

 Yes, you'd need to pass some sort of file descriptor to what ever 
 co-processor you are using to implement the FAT file system, to
specify 
 the disk image. Once you have the disk image mounted for the drive 
 number the file system can simply translate the sector in the FAT
file 
 system to the sector or sector pair used by the CoCo.

 I do have a FAT file system for the AVR Mega 32 but it required a bit
of 
 work translating the low level driver code which was written in some 
 sort of assembler or low level BASIC. The File system was written in
C.

 John.

 -- 
 http://www.johnkent.com.au
 http://members.optusnet.com.au/jekent

 --
 Coco mailing list
 Coco at maltedmedia.com
 http://five.pairlist.net/mailman/listinfo/coco