[atari7800] Re: PAL timing?
- From: "Eric Ball" <ek-ball@xxxxxxxxxx>
- To: <atari7800@xxxxxxxxxxxxx>
- Date: Fri, 17 Aug 2007 20:27:13 -0400
There may be a slight difference in the CPU timing between PAL & NTSC, but
there are the same number of cycles per line. The bigger difference is the
frame refresh (50Hz vs 60Hz) and the number of lines per frame (312 vs 262)
which means you have 50 more visible lines and need additional DLL entries.
(Which is typically why NTSC games crash on PAL 7800s, due to a
mis-triggered DLI, or show garbage at the bottom of the screen.)
One interesting item is the 7800 palette is the same for both NTSC and PAL,
unlike the 2600.
- References:
- [atari7800] PAL timing?
- From: Dennis Debro
Other related posts:
- » [atari7800] PAL timing?
- » [atari7800] Re: PAL timing?
- » [atari7800] Re: PAL timing?
- » [atari7800] Re: PAL timing?
- [atari7800] PAL timing?
- From: Dennis Debro