[Coco] Error in vcc or RGBDOS

[Robert Gault]

Bill Pierce wrote:
>
> I've noticed this myself a while back. After an I/O on the empty virtual floppy (Fd-502), then DRIVEON, it seems to loose the VHD.
>

Ah, that is slightly different from what I understood Luis' problem to be.

The same thing happens with MESS so there may be an error in the RGBDOS ROM for 
emulators. RGBDOS on real hardware does not exhibit this problem. After an I/O 
error with a floppy, there is no problem reading a hard drive or a different 
floppy drive.
At first glance, I see no reason for this in the RGBDOS code. It is possible it 
is a result of the emulation process itself. I'll spend more time going through 
the RGBDOS source code and if I find a cause for this, I'll make a new ROM 
available.