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trident
Registered: May 2002
Posts: 91 |
the first examples of rasterbars on the c64 and the amiga
here's an idea: could we collectively try to find the first example of a rasterbar in a c64 demo?
this idea came from a now-closed forum thread that brought up an interesting question:
* did rasterbars originate on the amiga?
this hypothesis is based on the idea that the amiga's copper makes it easy to produce rasterbar-like effects.
i figured we might want to dig deeper into this question. my personal understanding was that rasterbars started on the c64, but this is only because i myself started on the c64 and haven't really been active on any other platform. so maybe i've been wrong all along, and rasterbars started on the amiga?
so let's try to find the earliest instances of rasterbar effects that we can find!
here's is what i did: i did an advanced search on csdb for c64 demos released between 1982 and end of 1985. this did not turn up much - it seems like there weren't that many c64 demos released this early.
there are plenty of c64 crack intros on csdb from this time though. but not that many that seems to show rasterbars. but here are a few that i found:
* Intro 6 (csdb release date 1985)
* Intro VII (csdb release date 1985)
* Intro VIII (csdb release date 1985)
* Danish Elite Intro (csdb release date 1985) <--- pretty lame rasterbar, but close enough
and then there are some early games that used rasterbar-like effects. the one i remember myself from back then is alleykat by andrew braybook, which was seems like it was released mid 1986. video here: https://www.youtube.com/watch?v=jV-E_gnzonw&ab_channel=MontyMol.. where we can see rasterbars behind the text in its intro.
the amiga was released in mid 1985, so those intros and games were released after the amiga hardware was available. but that doesn't necessarily mean that copper bars were done already.
does anyone have any more examples? and could anyone find examples of early amiga demos that display rasterbars/copperbars? |
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Jetboy
Registered: Jul 2006
Posts: 265 |
How about this?
Skyline Software Systems presents Graphics (1984) earlier than amiga got released, much earlier than Amiga got into the masses. |
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Krill
Registered: Apr 2002
Posts: 2940 |
Quoting Jetboy Skyline Software Systems presents Graphics (1984) earlier than amiga got released, much earlier than Amiga got into the masses. Nice find! Code is simple and elegant: .C:1000 78 SEI
.C:1001 AE 12 D0 LDX $D012
.C:1004 BD 00 11 LDA $1100,X
.C:1007 EC 12 D0 CPX $D012
.C:100a F0 FB BEQ $1007
.C:100c 8D 20 D0 STA $D020
.C:100f 4C 01 10 JMP $1001 |
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Jetboy
Registered: Jul 2006
Posts: 265 |
Not usual rasterbars, but still nice:
ABC Crackings Raster Intro 1984 |
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iAN CooG
Registered: May 2002
Posts: 3168 |
Quote: How about this?
Skyline Software Systems presents Graphics (1984) earlier than amiga got released, much earlier than Amiga got into the masses.
Very clever early example.
Anyway changed release type from Crack Intro to Onefile demo |
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mankeli
Registered: Oct 2010
Posts: 127 |
Quote: How about this?
Skyline Software Systems presents Graphics (1984) earlier than amiga got released, much earlier than Amiga got into the masses.
Rastercolors and raster effect but not rasterbars imo 🤔 |
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Krill
Registered: Apr 2002
Posts: 2940 |
Quoting mankeliRastercolors and raster effect but not rasterbars imo 🤔 Yes, it's all somewhat arbitrary. |
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HCL
Registered: Feb 2003
Posts: 727 |
omg aren't we drifting away here.. How could we possibly define a rasterbar other than the ability to change color each line. If this ability is used to picture a bar, a pipe or a rainbow must be totally irrelevant. Comprendamos? |
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chatGPZ
Registered: Dec 2001
Posts: 11281 |
please elaborate |
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HCL
Registered: Feb 2003
Posts: 727 |
The earlier mentioned demo Quote:Skyline Software Systems presents Graphics clearly uses a code that enables changing (border)color each line, as also seen in the code example. Isn't that exactly what is asked for in this thread? Why then start discussing what does and does not qualify as a "rasterbar". A "bar" can be drawn in bitmap-mode or even char-mode depending how many colors you want it to have.. but a "rasterbar" is then probably a bar not drawn by graphics, but created with a raster effect, raster-code, code timed to the blitting raster (damn who asked me to elaborate.. it only gets more blurry). |
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Flex
Registered: Feb 2002
Posts: 107 |
Wise words from HCL. |
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