[Coco] [Color Computer] Re: using Tandy FD drives in a PC

[Charlie]

The FD-501 drive worked perfectly in the 486 system. I was able to 
format and read, write 180K disks under DOS and Anadisk worked great.

I was able to copy COCO disks and they worked great. However anadisk 
did not copy the COCO3 Sundog copy protected games. Sinistar, Warrior 
King, Quest for Thelda all copied but didn't work the same as if I 
had just done a BACKUP 0 TO 1 in the COCO itself.

Anadisk was able to copy the COCO2 game White Fire of Eternity and I 
believe that is copy protected. I'll have to try other games tonight.

So in the end, I'm still not able to make backups of my favorite COCO 
games :(

-Charlie



--- In ColorComputer at yahoogroups.com, "Mike Pepe" <lamune at d...> wrote:
> The reason your drives are both being selected at the same time has 
to do
> with a quirk of PC floppy cabling. It has nothing to do with the 
age or cpu
> type or speed of the PC you're using.
> 
> All PC floppies are shipped from the factory set as "drive 1". (or 
is it 2?
> I'm not sure now) The twist in the cable determines which actual 
drive
> select line goes to the proper drive. Thus, you plug a drive into 
the first
> connector and it's "A", the second is "B".
> 
> There are two ways to solve this:
> 
> 1- use the PC cable, but set your CoCo drive to DS1 (or 2, if 1 
doesn't
> work) or:
> 
> 2- use a straight through cable without the twist. Set your A drive 
to DS0
> and your CoCo drive to DS1
> 
> Don't forget to remove or disable the termination on the drive 
that's not at
> the end of the chain.
> 
> I'm pretty sure the FD-501 drive has drive select jumpers, but if 
it does
> not, as you discovered, you can connect it as the only drive and it 
should
> work in any PC. You may need to experiment with the twisted/non-
twisted
> sockets and whether the PC thinks it's drive A or drive B.
> 
> > -----Original Message-----
> > From: Charlie [mailto:chazbeenhad at h...]
> > Sent: Thursday, June 03, 2004 8:57 AM
> > To: ColorComputer at yahoogroups.com
> > Subject: [Color Computer] Re: using Tandy FD drives in a PC
> > 
> > --- In ColorComputer at yahoogroups.com, Robert Emery
> > <theother_bob at y...> wrote:
> > > >   ----- Original Message -----
> > > >   From: Charlie
> > > >
> > > >   I could NOT get the FD-501 drive to work as drive B on any 
of 3
> > > >   different PCs last night.
> > > >
> > > >   1st of all, as it was with a 1.44 floppy on the ribbon cable
> > both
> > > >   drives acted as A at the same time.
> > > >
> > > >
> > > >   Any tips on getting this 180K fd-501 disk to work on a PC?
> > > >
> > > >   -Charlie
> > >
> > > --- sadolph <sadolph at m...> wrote:
> > > > There is a resistor network that needs to be uninstalled, on 
the
> > b drive I
> > > > believe.
> > > >
> > > > Also, you have to jumper the drive to be drive b.  there are
> > usually markings
> > > > that identify which jumper it needs to be.
> > > >
> > >
> > > If your cable allows it, try putting both drives on the same 
side
> > of the twist
> > > (if you can't find the DS jumpers.) The terminating resistor
> > network should be
> > > removed if it's not the last drive on the cable.
> > >
> > > Bob
> > >
> > 
> > Yesterday I did get the FD-501 drive working in a Asus A7a-266 
mobo
> > with an Athlon 900 cpu running DOS.
> > 
> > My FD-501 drive has no jumpers at all. There is a spot that says 
DS0
> > DS1 DS2 DS3 but there are no jumper pins, the DS0 and DS1 are
> > soldered together. Regardless, It was working as a single drive 
A. Of
> > course I told the bios it was a 360K floppy, but I got no error 
and
> > Anadisk was writing and reading from the drive just fine.
> > 
> > Still though, at the COCO the disks were no good. No DIR, nothing
> > just IO errors. I took the FD-501 drive out of the PC and threw in
> > one of the 360K drives I use on my COCO and got the same results.
> > 
> > So maybe it has to do with the disk controller on the mother 
board.
> > Or, a combo of both .....
> > 
> > I guess I'll have to search around here at work for the oldest 
system
> > I can find with a 486 or 386 cpu.
> > 
> > -Charlie
> > 




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