[Coco] Just another peek...

[Aaron Wolfe]

FWIW, you can run Drivewire at 460kbps with the coco3fpga, which is nice
but still not as fast as a local disk.  It pushes the limits of usable
performance though (at 460k, you are usually waiting on something other
than disk access :)

On Fri, Oct 9, 2015, 7:59 PM Dave Philipsen <dave at davebiz.com> wrote:

> Oh and, by the way, I'm definitely not knocking drivewire.  It certainly
> has its place and its functions are much more than just a 'disk
> controller' but the SD card on the CoCo3FPGA is an order of magnitude
> faster than drivewire running at 115.2kbps.  And rightfully so as its
> SPI interface is running at a frequency that is an order of magnitude
> higher than a typical serial port. It is especially noticable when
> you're doing disk intensive operations like assembling or compiling
> programs.
>
>
> Dave
>
>
> On 2015-10-09 17:49, tim franklinlabs.com wrote:
> > That makes sense. I was looking at the Atari 800 SOC for the DE1 and
> >    they did the same thing. Thanks for clarifying that.
> >
> >      On October 9, 2015 at 3:39 PM Dave Philipsen <dave at davebiz.com>
> >      wrote:
> >      The wires that can be added are not a requirement. The DE1
> > evidently
> >      neglected to connect the card insertion switch. So if you want
> >      NitrOS9
> >      to automatically detect when you have removed the card or
> >      'hot-plugged'
> >      a new one in then you need the wires. I have personally run the SD
> >      card
> >      successfully under NitrOS9 without any wires. In that condition
> > it's
> >      best that you regard the SD card as non-removable unless you shut
> >      OS9
> >      down.
> >      As I mentioned before the access to the SD card is not yet
> >      integrated
> >      into DECB. The card does work in that environment but you must
> > write
> >      your own 'driver'. I have personally used code to access sectors
> >      (reading and writing) from the DECB environment. In fact, I
> > already
> >      have the core of a program that can manage multiple 'partitions'
> > on
> >      the
> >      SD card and make them available for booting from DECB.
> >      Dave Philipsen
> >      On 2015-10-09 15:21, tim franklinlabs.com wrote:
> >      > From what I understand (from the documents) the SD card only
> > works
> >      with
> >      > Nitros9 and requires a wire to be added (not sure about the wire
> >      > thing). Everything I read states it doesn't work with DECB (yet!
> >      > maybe?)
> >      >
> >      > On October 9, 2015 at 1:27 PM Michael Brant
> >      > <brant.michael.l at gmail.com> wrote:
> >      > I am also interested in knowing more about the SD card access as
> > i
> >      > would
> >      > want a stand alone setup.
> >      > On Oct 9, 2015 2:24 PM, "Barry Nelson"
> >      > <Barry.Nelson at amobiledevice.com>
> >      > wrote:
> >      > > I would want one of these, but I do not want to have to use an
> >      > external
> >      > > DriveWire server. Any updates on how the SD card access is
> >      > going?
> >      > >
> >      > >
> >      > >
> >      > > > Dave Philipsen dave at davebiz.com
> >      > >
> >      > > > Fri Oct 9 10:51:34 EDT 2015
> >      > >
> >      > >
> >      > >
> >      > > > It works just like the other video modes on the CoCo 3. The
> >      > video
> >      > > memory is part of the 512k memory map. In this case about
> >      > 288,000
> >      > bytes of
> >      > > memory are used.
> >      > >
> >      > >
> >      > >
> >      > > > Dave Philipsen
> >      > >
> >      > >
> >      > >
> >      > > O/ On Oct 9, 2015, at 1:45 AM, Brett Gordon <beretta42 at
> >      > gmail.com>
> >      > > wrote:
> >      > >
> >      > > > >
> >      > >
> >      > > O/ That's awesome Dave! So where exactly is this video memory
> >      > coming from?
> >      > >
> >      > > O/ ahhh.. i really want one of these now...
> >      > >
> >      > > > >
> >      > >
> >      > > O/ --
> >      > >
> >      > > O/ Coco mailing list
> >      > >
> >      > > O/ Coco at maltedmedia.com
> >      > >
> >      > > O/ https://pairlist5.pair.net/mailman/listinfo/coco
> >      > >
> >      > >
> >      > > --
> >      > > Coco mailing list
> >      > > Coco at maltedmedia.com
> >      > > https://pairlist5.pair.net/mailman/listinfo/coco
> >      > >
> >      > --
> >      > Coco mailing list
> >      > Coco at maltedmedia.com
> >      > https://pairlist5.pair.net/mailman/listinfo/coco
> >      --
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> >      Coco at maltedmedia.com
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>
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