41. When all color merging possibilities are considered, the CTIA / GTIA hardware can output 23 colors per scan line . 42. A single " frame " of the picture was typically made up of 24, 48, or 60 scan lines . 43. Any rapid change in contrast along a given scan line causes the voltage from the camera to suddenly change. 44. This can result in scan lines and flickering on the screen, and makes for a poor-quality picture on larger televisions. 45. The total scan lines displayed in the scrolling region is then 6 + 8 + 3 = 17 scan lines . 46. The total scan lines displayed in the scrolling region is then 6 + 8 + 3 = 17 scan lines. 47. Analogue television signals have no pixels; they are rastered in scan lines , but along each line the signal is continuous. 48. To understand how it works, you need to know that TV pictures are made up of what are called scan lines . 49. When enabled, Player / Missile DMA occurs on every scan line in the visible display from scan line 8 to 247. 50. When enabled, Player / Missile DMA occurs on every scan line in the visible display from scan line 8 to 247.
