Re: A86: Re: Re: Re: BG v1.0 grayscale converter is out !

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: Re: Re: BG v1.0 grayscale converter is out !
From: Jimmy =?iso-8859-1?Q?M=E5rdell?= <yarin@acc.umu.se>
Date: Wed, 03 Jun 1998 01:20:05 +0200
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <007701bd8e40$19c16dc0$85c5ffd0@matt>
Reply-To: assembly-86@lists.ticalc.org


At 12:04 1998-06-02 -0400, you wrote:
>You could use a pre-calculated Lookup table for the PutPixel routine for any
>memory address, suitable for grayscale.
>You could use an ultra fast IM 2 interrupt handler for grayscale (see
>gray.asm attached by Dux earlier). Thats your
>interrupt handler we derived that from Jimmy, remember (the Down-Left bug
>fix message a few months back)

Not necessary; grayscale & putpixel is fast enough. If you want to
optimize something, you shouldn't optimize the part of the program
that's seldom run (compared to the mathematical parts).

>[linear addressing $4000-$BFFF]

Yes, I've also had that idea...

--
Real name: Jimmy Mårdell                "can't go mucking with a 'void *'"
IRC......: Yarin                                // Apple's MPW C compiler
Email....: mailto:yarin@acc.umu.se        
Homepage.: http://www.acc.umu.se/~yarin/   <-- NEW HOMEPAGE!!

Follow-Ups:

Re: A86: Re: Re: Re: BG v1.0 grayscale converter is out !

From: Dux Gregis <assets@eden.rutgers.edu>

References:

Re: A86: Re: Re: Re: BG v1.0 grayscale converter is out !

From: "Matt2000" <matt2000@gte.net>