Piero Cavina wrote:
>
> According to the Stella programmer's guide, a NTSC TV frame generated by
> the 2600 consists of 3 VSYNC lines, 37 VBLANK lines, 192 TV picture lines
> and 30 "overscan" lines.
>
> The question is: do we really need to do the "overscan" lines?
>
> I'm writing my first game for the 2600 and I didn't care about overscan (I
> just draw more empty TV picture lines). After a lot of try-and-miss I could
> get a steady picture, so I don't think it's really needed. What do you
> think?
I think if your game displays steadily, then you must be right. I'm not
even sure what overscan really means. I just draw 192 lines in my game
then WSYNC 30 times before looping to VSYNC and it looks fine.
--
Thank you for your support,
mor@xxxxxxx
http://www.crl.com/~mor/
