[Coco] Can't copy real floppy to CoCo-SDC on a CoCo 2

[Darren A]

On Fri, Feb 27, 2015 at 11:48 AM, wrote:

> I've managed to alter the issue slightly, but the BACKUP command still
> will not work between the CoCo-SDC and a real floppy on my CoCo 2.
>
> I have removed one of the floppy drives. The remaining drive appears to be
> a Tandon TM-65L. There is a terminating resistor pack installed (RP1), the
> DS jumper is set to D0, and I'm using a straight flat ribbon cable and the
> drive is connected to the last connector on the cable.
>
> I issue DRIVE 0,OFF and I can access the real floppy as drive zero. I can
> do a dir and load programs from the real floppy without issue. Likewise, I
> have a DSK image mounted from the SD-card as drive 1 and I can also do a
> DIR, SAVE to drive 1 without issue. Now, if I attempt to do a "BACKUP 0 TO
> 1" I now get an "?IO ERROR" instead of "?SN ERROR". SDC-DOS still seems to
> be working, but for some reason, the BACKUP command fails. When I issue the
> "BACKUP" command, it starts to read the real floppy. The LED on the
> CoCo-SDC never lights up. Any ideas on what's happening or further
> troubleshooting ideas?
>


It sort of sounds like the SDC-DOS image in the flash has become corrupted.
My first suggestion would be to download the SDC Setup utility and use the
option to program a fresh copy of SDC-DOS into the flash:

<http://tinyurl.com/sdcsetup1>

- Darren