Re: [stella] Missile Graphic only on for one line

Subject: Re: [stella] Missile Graphic only on for one line
From: "2600Prog-AP" <2600@xxxxxxxxxxxxxx>
Date: Wed, 12 Feb 2003 19:05:15 -0500
----- Original Message -----
From: "Dennis Debro" <ddebro@xxxxxxxxxxxxx>

> Hi Adam,
 Hi Dennis,

> > Well here's my first attempt at something on the 2600, but I ran into a
> > teeny problem. My missile graphic only seems to stay on for 1 scanline,
> > after several rehashes I'm still stuck on the one scanline. I'm not sure
> > there's something fundamental I'm missing about how the missile works.
> If I understand you correctly you're expecting to the missile graphic to
continue down the screen. If that's the case then it would be because you're
setting RESMP0 to #$02. When you turn on bit 1 (i.e. #%00000010) then the
missile will be locked to the center of it's corresponding player and also
be disabled. If you use #$00 then the missile can move independently of it's
player and it will also be enabled.
> Disregard all of this if this is not what you meant ;)

No I can't disregard it, because this is exactly what I meant! ;) I'd spent
too much time looking at the code and not enough time thinking about what
I'm doing and reading the documentation properly. The problem was completely
related to my resetting RESMP0 to $02. Thankyou!

> Take care,
> Dennis

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