[Coco] FD501

Mark Marlette mark at cloud9tech.com
Wed Nov 22 07:54:37 EST 2006


Thanks for the plug... :)

I forgot to indicate in my last post about this... The DOS Adapter is  
in stock.


Quoting "Darren A." <darccml at hotmail.com>:

>> I picked up a TANDY FD501 complete. First original TANDY FD I've ever
>> owned. Drive 0 only. Only one R/W head, unfortunately. What I find
>> curious is that both the DS0 and the DS1 bridges are soldered (not to
>> each other), as if the appropriate jumpers were in place. I checked the
>> ribbon cable and it appears fully intact and original. I've not had the
>> chance to try it out. Is it normal for these units to have DS0 *and* DS1
>> jumpered? Can't figure that one out.
> -
> Yes, my FD501 also has both DS0 and DS1 connected. Tandy's method of
> drive selection was to remove the appropriate contacts from the edge
> connectors on the cable.
>> Other thing. The RS Disk Basic ROM is the old smaller variety. Is it
>> possible to rig a 27xxx chip into there?
> -
> Cloud9 sells (used to sell) an item called the DOS Adapter. It was a
> nice little board that allowed a 28-pin (27xxx) EPROM to be plugged
> into the 24-pin sockets used by Tandy. Whether or not you can still get
> one is another matter. There are instructions floating around the web
> that show how to make your own adapter with multiple piggybacked
> sockets, but it's a real hassle, and it makes the cart too big to fit
> in the coco.
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