I have investigated the rasterline 0 anomaly a little further to see what happened if I expanded the screen by $9003 (36867). I noticed that if I expand the screen just to far enough rasterline 0 contents will in fact be a copy of the first rasterline in that final char-line. I let the pictures speak:
PAL: NTSC:
You can notice that in PAL there actually is a border-colored line above rasterline 0, while in NTSC there is not!
Continued in next post...
VICE palette files with colors as seen on real machines
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Re: VICE palette files with colors as seen on real machines
I've amended my vert0test.prg to display those oddities as well, see at the bottom
Results of the new test for PAL: and NTSC: New vert0test:
Results of the new test for PAL: and NTSC: New vert0test:
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- vert0test.zip
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Re: VICE palette files with colors as seen on real machines
thanks, added to the repo!
I'm just a Software Guy who has no Idea how the Hardware works. Don't listen to me.
- Aturnwald
- Vic 20 Amateur
- Posts: 47
- Joined: Sat Feb 13, 2016 2:11 am
- Location: Germany / Bavaria
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Re: VICE palette files with colors as seen on real machines
Sorry for interrupt, but may be I can explain that 1 raster line at the top in PAL mode, but I'm not for sure, so correct me, if I'm wrong.
it has all to do with the sub-sequences that would be send by PAL, for e.g. you know, on old VCR's when look a movie you at the top of your screen, sometimes a black scrambled line ( it happens when the VCR's head isn't installed correctly ), on this line there would be send some informations about the screen, and the picture and movie-data ect. Also a lot of years ago in German, it was during the 80s a TV-station ( WDR ) sent over this line some files for the C64, ATARI, PC, AMIGA it was called "Public Domain" and with a special hardware you can get all these files, and every 24 h it changed and new files comes up. So, I used my VIC20 to send on this line files over the TV-Network in our home to another VC-20 ( it worked also on the C64, too ). I had a special electric module on the USER-PORT, with a small software and that's all. Also the guy, how installed this at my home, told me, that exactly this line would to all the stuff.
So, I think maybe that is, what you find out, but I'm not for sure, it's just a explain, also forgive me please for the interrupting.
cheers Toni
it has all to do with the sub-sequences that would be send by PAL, for e.g. you know, on old VCR's when look a movie you at the top of your screen, sometimes a black scrambled line ( it happens when the VCR's head isn't installed correctly ), on this line there would be send some informations about the screen, and the picture and movie-data ect. Also a lot of years ago in German, it was during the 80s a TV-station ( WDR ) sent over this line some files for the C64, ATARI, PC, AMIGA it was called "Public Domain" and with a special hardware you can get all these files, and every 24 h it changed and new files comes up. So, I used my VIC20 to send on this line files over the TV-Network in our home to another VC-20 ( it worked also on the C64, too ). I had a special electric module on the USER-PORT, with a small software and that's all. Also the guy, how installed this at my home, told me, that exactly this line would to all the stuff.
So, I think maybe that is, what you find out, but I'm not for sure, it's just a explain, also forgive me please for the interrupting.
cheers Toni
.....42, what else ???