Newbie question, WAS: Re: [Coco] 6809 example

[jimcox at miba51.com]

On Mon, 19 Jan 2004 02:46:56 -0600
  Roger Taylor <rtaylor at bayou.com> wrote:
>At 04:54 PM 1/18/2004 -0500, you wrote:
>>As an aside, can any of the beginners explain why 
>>Theodore's Hello program results in reversed colors on 
>>the Coco 32 column screen? What would you need to do to 
>>print in the default, black letters on green background?
>
>
>This is mainly a VDG/hardware issue, so this might not be 
>fair to a 6809 beginner.
>

Can someone enlighten me as to what VDG is?  Thanks!

Jim