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From: jdow@gryphon.CTS.COM (Joanne Dow)
Newsgroups: comp.sys.amiga
Subject: Re: Sprites
Message-ID: <1686@gryphon.CTS.COM>
Date: Mon, 28-Sep-87 19:04:22 EDT
Article-I.D.: gryphon.1686
Posted: Mon Sep 28 19:04:22 1987
Date-Received: Wed, 30-Sep-87 03:45:55 EDT
References: <1758@crash.CTS.COM> <1659@gryphon.CTS.COM> <4034@well.UUCP>
Reply-To: jdow@gryphon.CTS.COM (Joanne Dow)
Organization: Wizardess Designs
Lines: 32

In article <4034@well.UUCP> ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) writes:
>In article <1659@gryphon.CTS.COM> jdow@gryphon.CTS.COM (Joanne Dow) writes:
>>Overscan eats into sprite time.  If you overscan enough you can even 
>>eat into the mouse sprite's time and even IT becomes a verticle bar. [...]
>
>	More egg, Joanne....			:-) :-)
>
>	There is a hardware stop for display DMA at data fetch cycle $18.
>Display DMA cannot occur before this cycle.  This cycle, oddly enough, is
>*just* after the data fetch for sprite 0.  So you'll never stomp the
>Intuition pointer.
>
>	Which is what I think they had in mind.

Your turn for something akin to egg. There may be such a stop; but, I have a
program that stomps the mouse cursor. The latest Showanim (4.0) is the guilty
party. The mouse turns into the cannonical vertical bar exactly the same way
any other sprite might. Showanim uses a LOT of overscan. And I can demung the
mouse by eating off about 10 dots on the right of the screen.

See - I'm always right --- except when I'm wrong.
<@_->


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