Date   : Wed, 15 Oct 2008 23:26:02 +0100
From   : C.J.Thornley@... (Chris Thornley)
Subject: WD179x in an FPGA

>BTW the implementation requires "raw" disk images, or raw track data. For
the TRS-80 there is an emulated disk format known as ".DMK" which contains a
small header, a header on each track, and raw track data. Atm I'm extracting
the raw track data and using that. The reason I need raw data BTW is that
the implementation supports all controller commands, including track
read/write commands.

There are some raw BBC disk images in FDI formmt created by the tool
Disk2FDI.
The file spec avilable on the website
http://www.oldskool.org/disk2fdi/files/FDISPEC.pdf

Example images available here
http://www.acornpreservation.org/index_discs_games.html

Chris



               />      Christopher J. Thornley is cjt@...
  (           //------------------------------------------------------,
 (*)OXOXOXOXO(*>=*=O=S=U=0=3=6=*=---------                             >
  (           \\------------------------------------------------------'
               \>       Home Page :-http://www.coolrose.fsnet.co.uk
 
-----Original Message-----
From: bbc-micro-bounces+c.j.thornley=coolrose.fsnet.co.uk@...
[mailto:bbc-micro-bounces+c.j.thornley=coolrose.fsnet.co.uk@...
uk] On Behalf Of Mark McDougall
Sent: 15 October 2008 12:55
To: bbc-micro@...
Subject: [BBC-Micro] WD179x in an FPGA


Hi Guys,

Thought this may interest some...

I've just gotten writes working on my FPGA implementation of the TRS-80 and
WD179x. Atm I can read disk images from flash/sram and format/write to sram.

If I recall correctly, the Beeb has a WD17xx-family controller in it. At
some stage in the not too distant future I'll have a go at hooking up the
WD179x to my Beeb implementation. Looking forward to trying out a few Beeb
games on it. ;)

BTW the implementation requires "raw" disk images, or raw track data. For
the TRS-80 there is an emulated disk format known as ".DMK" which contains a
small header, a header on each track, and raw track data. Atm I'm extracting
the raw track data and using that. The reason I need raw data BTW is that
the implementation supports all controller commands, including track
read/write commands.

I haven't even looked into the BBC emulated disk formats, but I'm assuming
either that there's a similar format specified, or another format which
contains only sector data. Anyway I'll check it out sometime soon...

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"

_______________________________________________
bbc-micro mailing list
bbc-micro@...               
http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro