15 May
2007
15 May
'07
5:44 p.m.
apparently the Rainbow sports a measly 200 lines of
resolution. But one mode does 800 pels horizontally!
What's up with that?
THe US TV standard specifies 525 lines, but rememebr that (a) that
includes the 'lines' during the vertical blanking period and (b) it's
interlaced. There are probably under 500 lines actually displayed in the
image, and if you're using a computer which sends the same data after
each vertical sync pulse -- thit it is ignores interlacing -- so that
pairs of lines on the screen show identical data, then you're going to
have something around 200 lines vertically.
The horizontal resolution is limited only by the bandwidth of the
circuitry and the amount of memory (essentially, the faster you send
pixels to the monitor, the more appear on each line :-). So 800 dots
horizontally is quite possible
-tony