Path: utzoo!attcan!uunet!super!udel!gatech!uflorida!haven!sylvester.umd.edu!brett
From: brett@sylvester.umd.edu (Brett S Bourbin)
Newsgroups: comp.sys.amiga.tech
Subject: HAM and Sprites...
Message-ID: <3046@haven.umd.edu>
Date: 16 Dec 88 17:25:51 GMT
Sender: news@haven.umd.edu
Reply-To: brett@sylvester.umd.edu.UMD.EDU (Brett S Bourbin)
Organization: University of Maryland, College Park
Lines: 37


	Oh boy!  After spending a full five days trying to track down a item
I concidered to be a "bug" in my code, I found out it really wasn't.  I have
been trying to build a custom View HAM screen, which would also have sprites
on it.  So like every good programmer (i.e. NOT HACKER. 8^)), I followed the
RKM and initialized everything, including V_SPRITES!V_HAM in the View and
ViewPort structures.  This should tell the MakeVPort function that I want
HAM in the bplcon0 register (for the hardware hackers), and that I want the
sprite color registers loaded in the Copper list.

	Well, to make a long story short, (I know, TO LATE) this was not the
case.  What I got was a screen with sprites, but the colors of the sprites
were all wrong.  They all were shades of grey (i.e. the default palette).
So I tried to change them AFTER the View was built and loaded (LoadView)
with the SetRGB4 call on all the sprite registers with still no result.  Now
I have to think that I am doing something wrong.  After about 20 more edits
of the subs.asm file (the one that builds the View), I decided to test one
more thing -- removing the V_HAM from the View and ViewPort.  Know what, I
got the sprite colors that I wanted!

	So tell me CATS, why if I specifiy a HAM screen are the sprite color
registers not loaded in the Copper list?  I looked at the Copper list and 
found it was actually loading the grey colors, after I told it twice, (once
in the LoadRGB4 and then SetRGB4) to change them?

	Is this a bug with the system software, or does something else have
to be specified that is not in the manuals.  The one solution I might have
to fall back on is creating a user copper list to change the colors, but
that seems like cheating.  8^)

--Brett S Bourbin
 __  __   _  __  _  Instructional Computing Programs -- Univ of Maryland
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