[Coco] Fwd: [midatlanticretro] Tandy Color Computer Drive Wire

[Arthur Flexser]

The problem there is that there is no free space in ECB for such
extensions, compared with 2K of free space in the Disk Basic chip.  You'd
have to sacrifice some Extended Basic commands, creating
substantial incompatibility with Basic programs.

On the CoCo 3, you might be able to put extensions into the internal ROM
chip that would be patched in above Super Extended Basic.  But the
problem in that case is that the chip is soldered in, requiring delicate
removal to avoid damaging the motherboard.  (Modifying ECB on the CoCo 3
would also involve removal of the same chip.)

Art


On Wed, Mar 18, 2015 at 3:35 PM, Joe Grubbs <jsgrubbs at hotmail.com> wrote:

> Has anyone tried (and/or is it even possible) to create a ROM image to
> replace the onboard ECB chip? Basically ECB with Drivewire extensions.
>
>
>
> > Date: Wed, 18 Mar 2015 14:17:49 -0500
> > From: go4retro at go4retro.com
> > To: coco at maltedmedia.com
> > Subject: [Coco] Fwd: [midatlanticretro] Tandy Color Computer Drive Wire
> >
> > FYI (not me, from another list)
> >
> >
> > -------- Forwarded Message --------
> > Subject:      [midatlanticretro] Tandy Color Computer Drive Wire
> > Date:         Wed, 18 Mar 2015 17:59:19 +0000
> > From:         Kelly Leavitt kelly at catcorner.org [midatlanticretro]
> > <midatlanticretro at yahoogroups.com>
> > Reply-To:     midatlanticretro at yahoogroups.com
> > To:   midatlanticretro at yahoogroups.com <midatlanticretro at yahoogroups.com
> >
> >
> >
> >
> > It's been a long time, but I finally dug in and created a Drive Wire
> > boot ROM card for my CoCo 3. Drive wire uses the CoCo serial port as a
> > replacement for the disk drive. It connects to a modern computer that
> > serves up disk images to the CoCo using standard disk commands.
> >
> >
> > Doing so forced me to learn about EPROMS and EPROM burning. Yes, I have
> > an EE degree, but it has been years since I've done any hardware work at
> > all.
> >
> >
> > I was able to create a single ROM with images for all 3 CoCo models. All
> > I need to do is change a couple of jumpers and I can use the same card
> > in any of my CoCos.
> >
> >
> > This built on the work of Mark Blair
> > (NF6X) at http://www.nf6x.net/2013/10/cocoeprompak/ and the folks at OSH
> > park (a board fab house).
> >
> >
> > Drivewire 3 was written by Boisy Pitre, who was at the last VCF.
> >
> > http://www.frontiernet.net/~mmarlette/Cloud-9/Software/DriveWire3.html
> > <
> http://www.frontiernet.net/%7Emmarlette/Cloud-9/Software/DriveWire3.html>
> >
> >
> > Kelly
> >
> > __._,_.___
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