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Forums > C64 Productions > First raster split?
2010-07-05 20:55
Trap

Registered: Jul 2010
Posts: 223
First raster split?

Something that's been on my mind for years ... wonder if I will ever find the answer:

Who did the first real raster split? I did mine in 1987, but I don't think I was the first?

Trap Crap Wrap
2010-07-05 21:11
Stone

Registered: Oct 2006
Posts: 177
Are you talking about who did it first in the scene, or first ever (in a publicly available production?)

I remember the first time I noticed a raster split. It was in the game "Choplifter", which came out for the '64 in 1982 or 1983.

Other than that, I think Danish Crackers were among the first in the scene to use raster splits in their intros (1984): Danish Crackers Intro

By hacking that intro, I learned to code raster interrupts, so my first intros with raster splits were coded in '84 or '85.
2010-07-05 22:05
TPM

Registered: Jan 2004
Posts: 110
okay.. stupid question: what's the rastersplit in DC's intro?
2010-07-05 23:01
Trap

Registered: Jul 2010
Posts: 223
I was thinking vertical split, not horizontal split. Sorry, That was definitely not clear in my first post.
2010-07-06 00:13
SIDWAVE
Account closed

Registered: Apr 2002
Posts: 2238
Triton Technology was the first i saw to do it
2010-07-06 09:59
Stone

Registered: Oct 2006
Posts: 177
Quoting TPM
okay.. stupid question: what's the rastersplit in DC's intro?
There's a $d016 split for the scroller.
2010-07-07 15:10
The Phantom

Registered: Jan 2004
Posts: 360
I did the first vertical split on my Atari 600xl computer, back in 1984.
2010-07-07 16:10
tlr

Registered: Sep 2003
Posts: 1822
Perhaps ABC Crackings Raster Intro?
2010-07-08 04:52
SIDWAVE
Account closed

Registered: Apr 2002
Posts: 2238
TLR: its not straight :D and not stable :D
2010-07-08 06:33
tlr

Registered: Sep 2003
Posts: 1822
Quote: TLR: its not straight :D and not stable :D

It's not straight but I'd say it's, from the viewers perspective, controlled in a stable manner.
It does use an unconventional technique though.
2010-07-08 11:27
JackAsser

Registered: Jun 2002
Posts: 2038
Simply setting $d020 every 63d cycle (or as often u like) will make a straight split (given the screen is turned off with $d011=0). Making the split not jump around each frame and making the split occur at the same x-position always is what is called a "Stable raster" which I'm sure Trap looks for.
 
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