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Pitcher
Registered: Aug 2006
Posts: 61 |
Raster Line?
Hi after recently coming back to the 64 after a long delay and loosing most of my disks, I have started to code again, but the problem i have is i cant remember how i used to detect the Raster/Scan line position.
I used to do a simple load a the screen line value and compare it to a register but i cant remember the register address, and cant find it in any of my old coding books, anyone now anymore? |
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T.M.R
Account closed
Registered: Dec 2001
Posts: 749 |
lda $d012 |
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Burglar
Registered: Dec 2004
Posts: 1048 |
cmp #$32 |
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Pitcher
Registered: Aug 2006
Posts: 61 |
Cheers lads, thanks for the help. |
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Devia
Registered: Oct 2004
Posts: 401 |
Head on over to http://project64.c64.org and grab yourself a copy of the good ol' Programmers Reference Guide at http://project64.c64.org/hw/c64prg10.zip
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yago
Registered: May 2002
Posts: 332 |
bne T.M.R
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HCL
Registered: Feb 2003
Posts: 717 |
Mostly it's of course better to set up an y-position interrupt to do the screen timing. However, that's some more lines of code.. |
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Oswald
Registered: Apr 2002
Posts: 5028 |
X position interrupts are more handy when it comes to splitting :P |
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Pitcher
Registered: Aug 2006
Posts: 61 |
Quote: Head on over to http://project64.c64.org and grab yourself a copy of the good ol' Programmers Reference Guide at http://project64.c64.org/hw/c64prg10.zip
Just order me an original copy off ebay, cheers mate. |
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FMan
Account closed
Registered: Dec 2003
Posts: 66 |
Quote: Mostly it's of course better to set up an y-position interrupt to do the screen timing. However, that's some more lines of code..
Why? I disagree. Using interrupts just adds overhead if you really don't need them (like running something on the background...) and I see no reason why interrupts are even as good a method, nor better - not to mention "of course" better, so please explain your thinking.
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Oswald
Registered: Apr 2002
Posts: 5028 |
fman, why oh why do u wipe out ur ass after shitting? its much simpler to just walk away without that extra effort. |
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chatGPZ
Registered: Dec 2001
Posts: 11148 |
maybe he doesnt? =) |
