Re: A86: NOT Question on tile maps :-)

To: assembly-86@lists.ticalc.org
Subject: Re: A86: NOT Question on tile maps :-)
From: Jimmy =?iso-8859-1?Q?M=E5rdell?= <yarin@acc.umu.se>
Date: Sat, 30 Jan 1999 12:21:34 +0100
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
In-Reply-To: <19990130.021626.-168699.2.rabidcow@juno.com>
Reply-To: assembly-86@lists.ticalc.org


At 02:16 1999-01-30 -0800, you wrote:
>>[4 bit scrolling]
>well, i wouldn't smooth scroll the sprites, either.  things must match

I'm not sure that would look all that good either. 2 bit movement
and even 3 might be ok, but not 4.

>>>lookup shift tables?
>>
>>Yeah. If you want to shift 5 steps to the left, instead of looping
>>5 shifts (or repeating 5 shifts), you could have a 256*8 byte lookup
>>table. Implemented in a clever way, it's _fast_ - trust me, I know :)
>
>oh my.  2k.  i suppose if have extra memory

Well, there is 16k at RAM page 1.

//Jimmy Mårdell

E-mail: yarin@acc.umu.se
Homepage: http://www.acc.umu.se/~yarin/

References:

Re: A86: NOT Question on tile maps :-)

From: Joshua J Seagoe <rabidcow@juno.com>

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