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76 Rastersplits   [2023]

76 Rastersplits Released by :
Fairlight [web]

Release Date :
3 August 2023

Type :
C64 One-File Demo

User rating:*********_  9.3/10 (16 votes)   See votestatistics

Credits :
Code .... Trident of Fairlight
Music .... Trident of Fairlight


SIDs used in this release :
Tape Request(/MUSICIANS/T/Trident/Worktunes/Tape_Request.sid)

Download :

Look for downloads on external sites:
 Pokefinder.org


User Comment
Submitted by HCL on 4 August 2023
Ah, thanx guys for explaining to me what is going on in here :). Guess i was too tired yesterday to figure it out. Some confusing things are that the FLI-area is split into 2 columns, when we all know it's 3 "chars".. Then the colors seem to be updated every 2:nd frame or so.

Very nice presentation and almost over-instructive text helping us through the FLI-jungle.. and i got lost anyway :D..
User Comment
Submitted by chatGPZ on 4 August 2023
It's basically a dynamic version of the "blackmail FLI" routine? Funky :)
User Comment
Submitted by Cruzer on 3 August 2023
At first I didn't get the point of this, since, as many have pointed out, you can easily make 80 splits with stretched FLI, i.e. get rid of the FLI bug by using less cycles, and switch to a unique char screen every line. But after checking the code I realize that you're changing the d800 color of the FLI bug by changing opcodes in the FLI displayer. It's definitely the first time I've seen this done dynamically and with 16 different colors. Amazing trick!
User Comment
Submitted by Rost on 3 August 2023
My version from Argon Grew up is an improved version of Charlatan. And please stop calling this Rastersplit ;-)
User Comment
Submitted by The Human Code Machine on 3 August 2023
And not to forget Argon's Grew Up with 80 splits a few months earlier than X-Rated's demo. Argon Grew Up
User Comment
Submitted by Zeus on 3 August 2023
@trident
Yes, we didn't do a decent job spreading Ratio 80 around at the time. We weren't prepared for such a hit demo. Being 13 years old may be one explanation. :D

The Trailblazer effect is indeed decent.

Looking forward to having a look at your code as well as at Ratio 80's again this weekend.

@Shine
I suppose Oswald meant Ratio 80. Have a look at the demo. 80 "normal" splits and after that give the demo some seconds more, it will then feature 160 "cheat splits."
User Comment
Submitted by trident on 3 August 2023
@pajda: the fli bugg is still there (there really is no way around it) - but its color can be chosen freely (all 16 colors) and can be changed every rasterline.
User Comment
Submitted by Joe on 3 August 2023
Nice!! really like demos of this sort coming back once and a while, rubbing on old tricks, showing new ones. An "ongoing discussion" as I like to call it!
User Comment
Submitted by Pajda on 3 August 2023
Cool! How did you get around the fli bug?
User Comment
Submitted by Oswald on 3 August 2023
no but nice anim :) anyone did 320 "splits" ? :D
User Comment
Submitted by Shine on 3 August 2023
Oswald, do you mean this Demo from Gloom:
160 Splits
?
User Comment
Submitted by Oswald on 3 August 2023
hmm and 160 splits from 89 is the absolute winner :D
User Comment
Submitted by Oswald on 3 August 2023
one can also stretch a bitmap line without fli bug and flip in new screens
User Comment
Submitted by Oswald on 3 August 2023
so 72 colors from screen ram, need 4 more, d800 possible with opcode, d021 reusing 2 sides, and maybe 1 sprite.
User Comment
Submitted by katon on 3 August 2023
An impressive one-file demo with perfectly matching music for everything in this production.
User Comment
Submitted by trident on 3 August 2023
yes, charlatan was first, with So-Phisticated II being a close second. those did do fli on every line, but suffer from a very evident fli bug. as did the final part in Algot's Revenge! . and then there were a bunch of demos, like Splitter , My, Oh My and what zeus mentioned Ratio 80 (which i hadn't seen before, that also had an awesome trailblazer scroller too btw!) that uses the every-other-line fli trick to get more splits and wider area, but at the expense of more restrictive coloring.

unlike those demos, this demo (i believe) is the first that actually splits the fli bug itself.
User Comment
Submitted by Shine on 3 August 2023
Yep Mixer...
The very 1st time i have seen a rastersplit was Charlatan

Anyway: This is really nice! :D
User Comment
Submitted by Mixer on 3 August 2023
There is also the Splitter by Beyond Force. Great effects all.
User Comment
Submitted by Zeus on 3 August 2023
It looks cool, definitely.

But have a look at Ratio 80 from my then group X-Rated:

Ratio 80

https://www.youtube.com/watch?v=SJsG88f9iAg&t=444s

I won't forget Hippie's line in the scroller "Hello Solomon, I did not take a single look at your routine..." :D
User Comment
Submitted by Wile Coyote on 3 August 2023
Thumbs-up to all things Rastersplits ^_^
User Comment
Submitted by Mixer on 3 August 2023
Nice :) And it is all done without the secret poke!
User Comment
Submitted by trident on 3 August 2023
to the best of my knowledge this is a world's first / world record, but please correct me if i'm wrong.

this demo shows full 40 characters wide fli rastersplits where even the fli bug itself is split. no tricks, no sprites, just code.

traditionally, fli rastersplits can only use the rightmost 37 characters of the screen, because the fli bug covers the first 3 characters. there is no way around the fli bug, but it is possible to trigger it only every second row, which a lot of people have used to make rastersplits that cover the entire area. but that restricts how the colors can be used within each character.

unlike those effects, the splitter in this demo actually triggers the fli bug on every line and there are no limits on how the colors can be used. the effect exploits a known quirk in how the fli bug works to effectively split the fli bug in half. i'm sure a lot of people have been thinking about doing exactly this effect over the past 20+ years or so. but i haven't seen anyone that actually did it.

there is a long history of bullshit explanations for this type of effect, which started with the first ever instance of it by Solomon in Charlatan by Beyond Force in 1989. the scrolltext describes how the author was able to make use of undocumented opcodes, thanks to a newly puchased oscilloscope, thereby allowing more color splits. this was written in jest, of course, and there was no need for any oscilloscopes or undocumented opcodes to make that splitter work.

because of this, in the 2015 release Black Magic by Clarence of Chorus the scrolltext talks about how that effect did not need any explanations that involved oscilloscopes or undocumented opcodes.

ironically, the effect in this demo actually needs undocumented opcodes. fortunately, these opcodes are actually really well-documented nowadays, so it is way easier to do this effect today than what it would have been 30+ years ago.
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