Article View: comp.sys.amiga.tech
Article #11386Re: Bug In MakeVPort
From: Brett S Bourbin
Date: Thu, 09 Feb 1989 16:54
Date: Thu, 09 Feb 1989 16:54
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1673 bytes
In article <13097@steinmetz.ge.com> barnettj@dollar.UUCP (janet a barnett) writes:
>I defined a dual playfield viewport with 5 planes, 3 foreground, 2
>background. I also turned on the SPRITES flag. MakeVPort, however,
>only generated copper instructions to load color registers 0 through
>15, even though I had attached a 32 color colormap. Is this a known
>bug?
Yes, I had the same problem when I wanted a HAM screen with the V_SPRITES
bit set in my v_Modes. I have never heard anything offical from CATS if
this was truly a bug in the graphics routine, but it is reproducable on
a standard machine.
What I did to get around this "bug" is create a user copper list just below
the top of the screen to load the sprite color registers. A bit of a hack
and you can not use the SetRGB() function on these registers, but it
works and is legal. (Right JimM? 8^) )
--Brett S Bourbin
__ __ _ __ _ Instructional Computing Programs -- Univ of Maryland
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College Park BITNET: bbourbin@UMDD
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!sylvester!brett From: brett@sylvester (Brett S Bourbin) Newsgroups: comp.sys.amiga.tech Subject: Re: Bug In MakeVPort Keywords: bug MakeVPort Copper Message-ID: <3070@haven.umd.edu> Date: 9 Feb 89 16:54:43 GMT References: <3806@ingr.com> <13097@steinmetz.ge.com> Sender: news@haven.umd.edu Reply-To: brett@sylvester (Brett S Bourbin) Organization: University of Maryland, College Park Lines: 25