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User Comment
Submitted by trident on 10 January 2025
this is an abso-fxxking-mazing demo and it goes like this:
* run of the mill 1988 intro: pretty cool
* three ora dycps: wow, cool!
* scrollers and shit: yeah nice
* final part: *W* - *T* - *F*
the bitmap stretcher in that final part is incredible - a world's first, and an amazing invention for 1988. i remember seeing this part back in the day and was floored.
to understand how cool it is, you need to know a little bit about vic trickery. with the vic chip, unlike later chips like the ones in the amiga, it is not possible to freely select what lines of the image should be shown and where they should be shown. so it is not possible to turn a picture upside down, or stretch a picture, or make a picture wrap around on a cylinder, and things of that sort. if you want to do things like that, you need to figure out how to do magic. these guys figured out how to do magic.
one magic vic trick, which is relatively easy to find, is that by rapidly forcing a badline on every rasterline (by increasing the lowest 3 bits of $d011 within 20 cycles), you actually can perform a simple form of stretching: you can stretch that first line of each 8th line a bitmap picture.
so you now know how to stretch the first line. great! let's just stretch the second line now! and the third!
but no - no matter how hard you try, you just can't stretch any of the other lines. only that first line.
this is something every young, aspiring, and up-and-coming c64 demo coder will go through.
and then you see this demo and it hits you right in the brain - apparently these guys figured out some way to tweak the vic chip that was way beyond your comprehension. oh, and BitBuster coded just a handful of demos and vanished. |
User Comment
Submitted by HBH.ZTH on 12 November 2014
Zyron: Regarding the unfortunate mix up of the two versions here on CSDB. This is the OFFICIAL version that was spread to contacts after the party.
The other version have a different intro. That's the version submitted to the demo competition (which it won very fairly, the last part is still mind boggling).
The following day(s) the first intro was replaced by a new one using a more suitable design and music. IMO it has a better look and feel due to the changes.
With that out of the way - can someone with extensive tools & know-how debug the last part: record how it interacts with the hardware and tell us what the fuck Bitbuster actually did?
I know there's no FLI at work, that the 7th bit is stretched using the FLD stretch bug. However, that still leaves a question how he shifts the other bitmap data around?
Those unfamiliar with the FLD stretch bug can do a search on "Marc's Movements" (RIFFS). |
User Comment
Submitted by BHF on 22 March 2013
Remember when I first saw it back in 88, WOW !
They were invincible in that democompo, well deserved win.
3 ora dycp, bitmapscroller, bitmapstrecher with singlecolor sideborderscroller & colors at once !. Not bad for a demo from mid+ 1988 ! Rawhead ftw !
Bitbuster, would have loved to see you back, just for once :D |
User Comment
Submitted by Killsquad on 21 March 2013
| Love this demo. One of my all time favorites. The stretcher is still really impressing. Bitbuster quit way too soon. |
User Comment
Submitted by Bob on 15 March 2013
User Comment
Submitted by Frantic on 1 November 2011
User Comment
Submitted by HCL on 1 November 2011
Just to clear things up (about the last part).. This is not FLI, and it is also not an FPP-routine. This is a bitmap stretcher made with clever use of d011-stretching. It can only stretch the picture, not turn upside down etc, hence not FPP.
Very interesting to see this effect, knowing that FLI and d011-stretching were not even invented at this time. It is quite a complex d011-stretcher i would say, no like the first thing you would come up with. I'm just trying to understand how they managed to figure this out, and not doing a more straight forward d011-stretcher with 3-color graphics and FPP.
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User Comment
Submitted by Hein on 24 December 2008
| Isn't it the first FPP routine as well? Super clever! |
User Comment
Submitted by Jammer on 30 October 2008
| hmm. so, why hasn't it got FLI-bug then? :) |
User Comment
Submitted by DeeKay on 30 October 2008
| According to Graham, this is actually the first implementation of FLI, even though it looks like a $d011 stretcher! 8) Yeah, it's weird, but if you look at the code, it's definately doing FLI stuff! |
User Comment
Submitted by Rough on 10 September 2007
| '+' sounds like the later (non-party) released version.. |
User Comment
Submitted by Zyron on 12 October 2006
| This version has a different intro than Official Partysqueezer. Not sure which one was actually spread at the party. |
User Comment
Submitted by Scroll on 5 July 2006
| The bitmap stretcher totally blew me away back then, it was ahead of its time. |
User Comment
Submitted by Cruzer on 20 April 2006
| Very nice stuff for 1988, especially the bitmap stretcher. |
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