Re: [stella] kernel approach, starfields

Subject: Re: [stella] kernel approach, starfields
From: Thomas Jentzsch <tjentzsch@xxxxxx>
Date: Fri, 19 Aug 2005 07:43:33 -0400
Glenn wrote:

> I have a question about starfields.

For DD? ;-)

> You'd probably use M0 and M1, right?

Or maybe the ball.

> My guess is that the scrolling itself could be
> accomplished similar to how Combat animates, via
> applying movement every frame without resetting
> position, and that will take care of the wraparound,
> so the only challenge is the repositioning in
> mid-screen.

Maybe you shouldn't repostion inside the kernel at all. If there is
enough vertical space between the stars of one direction, you
could just HMOVE every scanline.

IIRC Starmaster does that. Check the disassembly.

> Given this description I bet some of you have an idea
> which game I'm thinking of here.

Not DD!

Have fun!
Thomas Jentzsch         | *** Every bit is sacred ! ***
tjentzsch at web dot de |

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