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QuasaR
Registered: Dec 2001
Posts: 145 |
Rasterline 0
Hello! At which rasterline starts the c64-screen? When I change the bordercolour in line $000 i can see the changing, when i choose $02f on my C128&1084S instead, it's invisible. I knew that on the C64 the timing is a little bit different to the one on the C128...
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QuasaR
Registered: Dec 2001
Posts: 145 |
little typo... i meant $12f instead of $02f... (highbyte set by bit 7 of $d011...) |
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Krill
Registered: Apr 2002
Posts: 2969 |
Afaik, the first rasterline is (of course) $000. Still, the first real visible rasterline on the PAL system is $0f, if I remember right. I don't know why you can see the changing. My first guess would be some bug ;), nah, anyway, monitors and TV set have that behaviour to move the screen down on very crass brightness changes from dark to bright. Ask Happymaker/Reflex for further details, it has something to do with a rather bad power conversion. |
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Hoogo
Registered: Jun 2002
Posts: 105 |
We once connected a C64 (or C128?) to a monitor that didn't care too much about Syncs. There we moved the upper/lower border to the middle of the screen and watched the additional signals. If I remember it correctly there appeared the lines ..311, then 0 to ..dont remember, then some Sync-and datalines without graphic, and at last the usual Screen. Ill ask if someone remembers it more exactly |
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enigma
Registered: Feb 2002
Posts: 15 |
Maybe that helps. If you have access to someone who uses
TV Card in PC, you can see there the complete PAL-Screen.
(Including the grey pixel when a rasterline starts and some black border in the right)
Since the VIC II Output doesn't match the usual format the common programs for watching tv expect, I prefer using DScaler with 'old-game' Deinterlace Filter.
It resembles the 50 frames with half vertical resolution.
(vs. the usual 25 frames with 2 half pics)
It's not as good for watching demos, since you'll see every timing dependend cycle offset in the left or right, which is invisible on a monitor.
Ciao... |
