A86: Large Sprites...

To: assembly-86@lists.ticalc.org
Subject: A86: Large Sprites...
From: Chris Magill <v8r@juno.com>
Date: Sun, 2 May 1999 14:28:57 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
References: <f7192215.245dc9ac@aol.com>
Reply-To: assembly-86@lists.ticalc.org


Ok,

I have decided to start working on a small game to help me better
understand assembly (nothing big like a side scroller or anything like
that..)

I am using Dux's Zoomin Mob Routine which stores the background..

My problem is that my characters are fairly large...(probally need 6 8x8
Sprites to draw them.)  The good thing is that most of the characters all
have the same traits which make several of the sprites repetitive... Like
I can use the same body and just change the face.  Anyways my problem is
this..  I wan't to have one call to draw the character at a specified
position, and then another to remove that character restoring the
background as provided by Dux's routine.  My question is can I just push
the backgrounds each time I draw a new portion of the character and then
pop them all when I am ready to remove the character.  I have read that
the stack does not stay the same when you use a call because the address
of your current position is pushed on the stack...  Would it be possible
to remove this position address from the stack and save it to a register,
then pop all of the backgrounds, and then finally replace the address
back on the stack and ret..

Is this acceptable or will it cause errors

Thanks,

Chris

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References:

Re: A86: Clear Screen [OT]

From: ComAsYuAre@aol.com