[A86] Re: The f'n 86 screen

To: assembly-86@lists.ticalc.org
Subject: [A86] Re: The f'n 86 screen
From: "Andreas Finne" <a_finne@hotmail.com>
Date: Mon, 01 Oct 2001 23:07:54 +0300
Reply-To: assembly-86@lists.ticalc.org


So, how do you know when the vertical refresh is ready? And why does it only 
happen at a horisontal line about 2 pixels wide?


----Original Message Follows----
From: "David Phillips" <david@acz.org>
Reply-To: assembly-86@lists.ticalc.org
To: <assembly-86@lists.ticalc.org>
Subject: [A86] Re: The f'n 86 screen
Date: Mon, 1 Oct 2001 12:49:59 -0700


This is caused by not waiting for the vertical refresh before updating the
screen, and erasing the sprite again before it's ever actually displayed.

 > I've actually come across this problem also. The first real game I made 
to
 > the 86 used a sprite routine by Movax. It worked great, but when I 
crossed
a
 > certain horisontal line on the screen, the sprite went 
"semi-transparent".
 > If I then started going horisontally along this line, the problem
remained.
 > If you want to see this problem in action, and don't mind downloading a
 > crappy game, you can get it from www.ticalc.org/pub/86/asm/bolldin.zip






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Follow-Ups:

[A86] Re: The f'n 86 screen

From: "David Phillips" <david@acz.org>