At 23:56 12/05/2004 +0100, you wrote:
>>
>> Hi
>>
>> I see that you in October 2003 were looking for the Rockwell R6765
>> datasheet (Ref.:
>
>Isn't this essentially the same thing as the NEC 765 or Intel 8227 floppy
>controller?
>
>-tony
Yes it is. The only real difference is that the Rockwell chip allows up to 255
step pulses when zeroing the head, while the Nec device will fail after 77.
Means you may have to do it twice with the NEC device if you have 80 track
drives).
You can grab the 765 datasheet from my "parse.com" page (see below), it's
available under the "Dunfield 6809" entry (I used it in the design of this
machine).
Regards,
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Received on Wed May 12 2004 - 18:57:25 BST