[Coco] serial port problem

[Luis Antoniosi (CoCoDemus)]

Try HDBDW3CC3 instead.



On Thu, Oct 31, 2013 at 10:51 PM, Aaron Wolfe <aawolfe at gmail.com> wrote:

> On Oct 31, 2013 10:25 PM, "Mathieu Bouchard" <matju at artengine.ca> wrote:
> >
> > Le 2013-10-31 à 19:36:00, Bill Pierce a écrit :
> >
> >
> >> Mathieu, Drivewire uses special software and protocol to run the Coco at
> 115200 baud.
> >
> >
> > Well, it's so special, that I don't even know whether it uses the cable
> at all. I downloaded hdbdw4cc3 onto the CoCo using CLOADM:EXEC, and started
> DW4 on the Linux machine, but now all I get when I DIR from the CoCo is ?IO
> ERROR.
> >
> > BTW the port detection problem is fixed already : I had to change
> permissions on /dev/ttyS0 (COM1).
> >
> >
> >
> >> This is why I say old baud rates do not apply. You do not "set" the baud
> rate for dw4 on the Coco. That is done in hdbdos and Os9 drivers. Leave the
> baud rate at the default value.
> >
> >
> > Look, the reason for using Terminate and UltimaTerm is to test that the
> cable is able to talk at high enough speeds to make it likely that
> Drivewire would work. With the above setup, I don't know what's going on.
> >
>
> The trouble you see in those terminal programs at higher speeds is most
> likely a red herring.  Cables that work at any baud rate will very often
> work at all rates.. nature of the beast.  When serial cables do fail at
> higher speeds it isn't usually an all or nothing situation, much more
> common to see sporadic problems, especially when lots of data is being
> transferred.
>
> In all the time I've been supporting drivewire, we have never had a cable
> that just didn't work at DW speeds.  We have had a few cables that would
> cause CRC errors now and then when doing full sectors of data. The
> resolution was always to shorten the cable.
>
> There are a wide variety of troubleshooting tools built into the drivewire
> software.  These will provide much more accurate information than tests
> with terminal programs will.  Before worrying about that, can you double
> check that your cable matches this specification?
>
>
> http://sourceforge.net/apps/mediawiki/drivewireserver/index.php?title=DriveWire_Specification#Physical_Interface_Requirements
>
> > On the CoCo3 in HDBDOS 1.4 DW, I also tried this :
> >
> > DRIVE OFF
> > BACKUP 0 TO 4
> > ?IO ERROR (after a few seconds of reading nonvirtual drive 0)
> >
> >
> >  ______________________________________________________________________
> > | Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC
> >
> >
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> >
>
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>



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