[Coco] rgb2vga rolling video

[Ed Snider]

Sounds like your vertical sync isn't getting through.  Check your CoCo's vsync output,
ribbon cable, connections, etc to ensure vsync is getting to the RGB2VGA board
and dev board header.

- Ed

> On Jan 6, 2020, at 10:04 AM, Matthew Stock <stock at bexkat.com> wrote:
> 
> [ trying again with the proper email address ]
> 
> Hello all,
> 
> The holidays have given me a little time to tinker with the CoCo, and I
> recently took the opportunity to order the RGB2VGA board that's up on OSH
> Park.  Soldered it up today and it looks great... except that the display
> is rolling vertically.  I've tried a couple of different monitors with the
> same result.  The test block screen looks solid and good, and so I suspect
> it's an issue with the CoCo 3 I have it attached to.  Anyone have any
> suggestions on how to fix it?  I was going to start diving into the VHDL
> and doing some debugging, but since I'm more of a Verilog person I figured
> I'd ask here and see if this issue has been seen and resolved before.  I
> looked in my email history and nothing jumped out.
> 
> Thanks for any assistance!
> 
> Matt
>