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From: mlschroe@medusa.informatik.uni-erlangen.de (Michael Schroeder)
Newsgroups: comp.sys.amiga
Subject: Re: QBSBlit() problems - for Dave Haynie ?
Keywords: DAVE HAYNIE C PROGRAMMING BLITTER
Message-ID: <3017@medusa.informatik.uni-erlangen.de>
Date: 23 Jul 90 12:01:27 GMT
References: <1990Jul19.213606.23011@uokmax.uucp>
Organization: CSD, University of Erlangen, W-Germany
Lines: 16

drtiller@uokmax.uucp (Donald Richard Tillery Jr) writes:

>Posted for Eric McVicker:

>I have a problem with QBSBlit(). The problem is it doesn't work!
> 
I think this is a bug in the OS! 
The QBSBlit routine checks if GFXBase->beam (?) is zero. If this is
true, it JUST CALLS QBlit() !!!
Unfortunatelly, GFXBase->beam is reset to zero at every TOF Interrupt.

My (ugly) solution (work around) is to busy wait for the beam 
position and then using QSBlit().

Hope that helps,
  Michael