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Article #1695

Re: Questions on BITBLIT, Malloc (not malloc), and 68 Disassemblers

#1695
From: Jeff Gortatowsky
Date: Fri, 05 Sep 1986 12:17
40 lines
2326 bytes
In article <8609050623.AA09089@ucbvax.Berkeley.EDU>, bammi@case.CSNET ("Jwahar R. Bammi") writes:
> The parameter block for bitblt (a007) is described in detail in the document
> titled 'The much awaited Line A document' that  comes with the developers
> sytem. Its too long to retype here.

No,no,no,... I meant I'd just like to see the same structure definition
that was published in the 68K issue of BYTE, only with the fields of the
structure commented as to what units they represent (BYTES,PIXELS,X/Y
pairs, words, etc).  That is assuming of course it is the correct structure
definition in the first place.  For example the structure starts with:

struct blahblah {
	short	b_wd,b_ht;
	.....
	....
	lots more stuff...

Now I looked at that and said AH HAH!
	block width and block height.
Hmmm ....in pixels? Must be.  Well maybe not. Hmmm.

The offsets (word,line,plane) really are the ones I can't deduce from
looking at the structure.  Offset by what?  Word offset? 16 bits right? Or
1 for one word.  Plane offset?  I thought the plane offsets were 0,1,2,3
words depending on color choice (or something like that).  I'll muddle
along figuring the rest out.  Just get me started with a commented
structure definition. Please?  

As for the Line A doc you mentioned, my developer buddy told me on the
phone that it says 'see the end of this document for a description of
BITBLT'.  Only there is no description to be found!  I asked him if the 300
bucks was well spent?   He hung up......

8^)


-- 
Jeff Gortatowsky       {allegra,seismo}!rochester!kodak!elmgate!jdg
Eastman Kodak Company  
<Kodak won't be responsible for the above comments, only those below>
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Message-ID: <521@elmgate.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rochester!kodak!elmgate!jdg
References: <8609050623.AA09089@ucbvax.Berkeley.EDU>

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rochester!kodak!elmgate!jdg
From: jdg@elmgate.UUCP (Jeff Gortatowsky)
Newsgroups: net.micro.atari16
Subject: Re: Questions on BITBLIT, Malloc (not malloc), and 68 Disassemblers
Message-ID: <521@elmgate.UUCP>
Date: Fri, 5-Sep-86 08:17:32 EDT
Article-I.D.: elmgate.521
Posted: Fri Sep  5 08:17:32 1986
Date-Received: Fri, 5-Sep-86 21:11:28 EDT
References: <8609050623.AA09089@ucbvax.Berkeley.EDU>
Organization: Eastman Kodak Co., Rochester, NY
Lines: 40
Summary: I'd like an example (well commented) of using BITBLT ($A007).