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Forums > CSDb Entries > Event id #2889 : Intro Creation Competition 2019
2019-11-04 17:55
Didi

Registered: Nov 2011
Posts: 374
Event id #2889 : Intro Creation Competition 2019

Preface: Please use this thread for questions, discussion and everything else concerning this competition.


Many people were asking about the competition being held this year. It turned out to be a good place to have it after the big X party each second year. But why not give it a try in between?

This time I decided to add a second category to the well known rules: 4kB intro! It is different to the 4kB intro category you know from demo parties. There the executable file has the limit of 4096 bytes and may allocate as much as you like during runtime. Rules here only allow to use 4kB overall for a different challenge. Please check the rules for more details. Result will show if that was a good idea.

Here you go...


Competition runs from November 4th, 2019, until January 5th, 2020. So you have a full 2 months to deliver your creations. This should be enough for an intro.

RULES for both categories:

Your intro entry...
- has to work on a plain stock C64 (PAL standard) without any extensions.
- has to be a one-part intro. Short fade-ins and fade-outs are OK.
- has to contain at least one Logo at whatever size you like.
- has to contain a changing or moving text message (e.g. scrolling text, different lines fading in & out, etc.)
- has to be interruptable any time by pressing SPACE-key (exception are short fade-in and fade-out).
- does not need to have exclusive graphics, charsets or music. But the code should be exclusive, so reuse of existing code with just exchanged graphics and music is not allowed.
- has not been publicly used before entering the competition.
- has to be handed in as executable format startable with RUN (.prg or embedded in .t64 or .d64).

Your 16kB intro...
- has a maximum RAM footprint of $4000 bytes at one block, at whatever location you like. Screen RAM counts as used memory. Exclusions are system addresses like VIC (inkl. Color RAM), SID, CIA, Stack, Zero-page, IRQ vectors. This means RAM besides chosen $4000 bytes area and exceptions has to be the same before and after running the intro. What happens during runtime is up to you.
- has to contain music (not just a humming sound, please).
- is linked to this competition as "C64 Demo" entry (sorry, no other fitting entry exists).

Your 4kB intro...
- has a maximum RAM footprint of $1000 bytes at one block, at whatever location you like. Screen RAM counts as used memory. Exclusions are system addresses like VIC (inkl. Color RAM), SID, CIA, Stack, Zero-page, IRQ vectors. This means RAM besides chosen $1000 bytes area and exceptions has to be the same before and after running the intro. What happens during runtime is up to you.
- does not have to contain any sound, but feel free to add some.
- is linked to this competition as "C64 4k Intro" entry.

You are allowed to enter maximum 3 entries per participant and category, so you are can enter 6 entries at best. Entries might be taken back from the compo until deadline. That means if you want to remove one of your works from the compo to make space for another entry from you, this can be done until deadline.
Deadline for entry submission is Sunday January 5th, 2020 at 23:59:59 (11:59:59 pm) CET.
Voting closes at Sunday January 12th, 2020 at 23:59:59 (11:59:59 pm) CET.
Voting platform is CSDb (with all disadvantages it may have), therefore entries have to be posted here.
Entries will be ranked by weighted average of CSDb votes. Entries with the same weighted average are ranked by their percentages of 10s, 9s, etc.

No prices to win, just the fame. May the best creation win!
 
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2019-12-08 12:48
Didi

Registered: Nov 2011
Posts: 374
Of cource not. But you should not rely on blanked screen or colors set by the decruncher.
2019-12-08 13:03
ChristopherJam

Registered: Aug 2004
Posts: 1032
Quoting Didi
you should not rely on blanked screen or colors set by the decruncher.



Sure, but can we decrunch directly to color ram if the decruncher supports multiple destination segments?
2019-12-08 13:11
Didi

Registered: Nov 2011
Posts: 374
You can decrunch to color RAM if you like, if the decruncher is part of your custom area. If you use another area e.g. $1000-$2000 and your intro relies on colors set by a decruncher which is used to make it run-excecutable, it might look strange because the decruncher will not be present anymore in a later collection.
2019-12-08 13:15
ChristopherJam

Registered: Aug 2004
Posts: 1032
Ah, that makes sense, thank you.

Ok, I'll just have 0801-1800 for my custom area I think, should avoid any confusion.
2019-12-09 23:53
Jammer

Registered: Nov 2002
Posts: 880
Tillax Intro

Count me in ;)
2019-12-12 19:44
TheRyk

Registered: Mar 2009
Posts: 707
Quote: Quoting TheRyk
only problem is there are just few useful routines in ROMs and the most useful (KERNAL CLRSCR) fills ColRAM differently on older ROM revs.


As Zyron pointed out a while back, you can safely use
	lda #col
	sta $d021
	jsr $e536
on both old and new ROMs


Does NOT seem to work on the kernal rev (probably 1 or 2) that WinVICE uses per default when you set "C64 model" to "OLD NTSC". you can use my the compo version of Madmen+Machines to check. ColorRAM is not initialised with accu but totally garbled. will of course be fixed when it's first used for a crack.
2019-12-12 20:16
Didi

Registered: Nov 2011
Posts: 374
LDA #color
STA $0286
JSR $E536
2019-12-12 20:59
iAN CooG

Registered: May 2002
Posts: 2605
old discussion on the same problem: $e544 ?

Disasming the various kernal roms it's clear what they did wrong.

rev 1 ALWAYS fills $d800 with 1 (white)
EA07  A9 20     LDA #$20
EA09  91 D1     STA ($D1),Y
EA0B  A9 01     LDA #$01    <-
EA0D  91 F3     STA ($F3),Y
EA0F  88        DEY 
EA10  10 F5     BPL $EA07
EA12  60        RTS 


rev 2 uses $d021 color
EA07  A9 20     LDA #$20
EA09  91 D1     STA ($D1),Y
EA0B  20 DA E4  JSR $E4DA  <- patch
EA0E  EA        NOP 
EA0F  88        DEY 
EA10  10 F5     BPL $EA07
EA12  60        RTS 

E4DA  AD 21 D0  LDA $D021  <- doh! wrong value
E4DD  91 F3     STA ($F3),Y
E4DF  60        RTS 


rev 3 finally gets it done correctly
EA07  20 DA E4  JSR $E4DA  <- patch first
EA0A  A9 20     LDA #$20
EA0C  91 D1     STA ($D1),Y
EA0E  88        DEY 
EA0F  10 F6     BPL $EA07
EA11  60        RTS 

E4DA  AD 86 02  LDA $0286  <- at last
E4DD  91 F3     STA ($F3),Y
E4DF  60        RTS 


CCS 2.x was known to provide a weird rev.2 kernal but with the LDA $D021 patched with the correct LDA $0286, instead of providing the rev.3 kernal directly.
2019-12-12 21:02
iAN CooG

Registered: May 2002
Posts: 2605
Quote: LDA #color
STA $0286
JSR $E536


sta $0286 is redundant, as it's exactly what does at $e536, and besides only works on rev 3
2019-12-17 20:37
Digger

Registered: Mar 2005
Posts: 355
Update from JCH regarding looking for small SIDs in DeepSID:

Search for a tag named "Tiny" and you should get SID tunes that are 512 KB in size or (usually) much smaller. Unfortunately I got the idea for this tag halfway through adding tags to all of HVSC, so it doesn't sit on everything yet.

Example search:
http://deepsid.chordian.net/?search=tiny&type=tag

Good luck finding some fresh stuff out there! <3
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