[Coco] RGB2VGA DE0-Nano Programming Help - Resolved

K. Pruitt pruittk at roadrunner.com
Sat Aug 1 16:06:55 EDT 2015


----- Original Message ----- 
From: "Steven Hirsch"
Sent: Saturday, August 01, 2015 5:59 AM
Subject: Re: [Coco] RGB2VGA DE0-Nano Programming Help - Resolved


> On Sat, 1 Aug 2015, Zippster wrote:
>
>> Leftmost column missing in 80 column?
>>
>> I don’t think it’s the monitor, or the RGB2VGA board.
>
> You can try playing with the code.  Here's a snippet of a note Luis sent 
> me on the subject last fall:
>
> -----------------------
>
> you can change the front porch and top border in the
> genlock.vhd:
>
> if (shrink = '0') then
> front_porch <= 128;
> elsif (apple2 = '0') then
> front_porch <= 202;
> else
> front_porch <= 184;
> end if;
>
> (change) 184 to 200 and test it.
>
> ---------------------
>
> This solved the same issue for me, albeit with an older version of the 
> FPGA code.
>
> Steve
>
>
> -- 
>

Thanks Steve. That sounds promising.

Is the code located online by any chance? I've just been using the .JIC file 
Kip placed on Dropbox awhile back. 



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