[Coco] memory expansion, SPI interface with VGA output

[Tormod Volden]

Indeed, there is a MOOH SD card image containing both NitrOS-9 Level 2
and FUZIX using the CoCoVGA 64 column mode here:
https://nitros9.sourceforge.io/mooh/

That said, I would love to see more people trying out the SPI
interface on the MOOH board to connect other devices, and the VGATonic
looks cool.

Regards,
Tormod

On Wed, May 1, 2019 at 4:31 PM Ed Snider wrote:
>
> There is also the CoCoVGA which can be used on nearly any MC6847 based machine.
>
> www.cocovga.com <http://www.cocovga.com/>
>
> There are also projects adding support for the CoCoVGA’s 64 column mode in both OS-9
> and Fuzix using the Mooh.
>
> Ron Klein recently posted on the Facebook group showing this (Mooh/CoCoVGA/OS-9/Fuzix/64 col).
>
> - Ed
>
>
> > On May 1, 2019, at 7:36 AM, Henri Mainville <henrymainville at gmail.com> wrote:
> >
> > Sounds like a lot to ask for, and who has it all ? I think Tormod's MOOH <http://tormod.me/mooh.html> might have provided enough functionality to make it possible.
> >
> > Thanks to the work of Tormod, CoCo/Dragon users can get a memory expansion board with an SPI and MicroSD interface which helps greatly if you want expanded functionality and ease of development on the CoCo/Dragon.
> >
> > In the mean time, there's a project I've been keeping my eye on which has been the VGATonic <https://hackaday.io/project/6309-vga-graphics-over-spi-and-serial-vgatonic>, serial VGA graphics module which is targeted towards microcontrollers and embedded devices with exposed SPI or TTL interfaces and capable of driving a display at 640x480 <https://hackaday.io/project/6309-vga-graphics-over-spi-and-serial-vgatonic/log/20001-hardware-accelerated-lower-resolutions-working>depending on your serial speed.
> >
> > I think these two modules might make the perfect combo for modernizing 6809-based computers like CoCO/Dragon but it might need a bit of dev work on drivers for NitrOS-9 or FUZIX to detect the SPI interface and drive the video module connected to it.
> >
> > I don't know for sure if it's even feasible but I would think so and I also wanted to share incase anyone else was curious.
> >
> >
> > Have a nice day and happy hacking!
> >
> >
> > Sincerely,
> >
> > Henri Mainville
> >
> >
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>
>
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