Image:CGA CompVsRGB Text.png

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CGA 80-column text display on RGB vs. Composite monitors. Created with the following BASICA code:

10 COLOR 7,0:CLS:DEFINT A-Z
20 LOCATE 1,1:COLOR 0,7:PRINT "80-column text on the Color/Graphics Adapter, RGB versus Composite              "
30 LOCATE 3,1:COLOR 7,0:PRINT "80-column text is difficult to read on a composite color monitor. The reason"
40                      PRINT "is that due to imperfect separation of the luma/chroma signal components,"
50                      PRINT "colorful swirls will appear around high-resolution patterns, as used in"
60                      PRINT "80-column text."
70                      PRINT "Depending on the choice of text and background color, the result may well be"
80                      PRINT "completely indecipherable:":PRINT
90 COLOR 7,0: PRINT "  Gray on black may not look pretty, but at least it's still readable.":PRINT
100 COLOR 7,1: PRINT "  Gray on blue on the other hand is a lot harder to read.":PRINT
110 COLOR 7,0: PRINT "  Finally, ";:COLOR 5,2:PRINT " magenta on green ";:COLOR 7,0:PRINT " is not legible at all on a composite monitor.":PRINT
120 PRINT "Here are all possible color combinations:"
130 FOR F=0 TO 15:FOR B=0 TO 7
140 COLOR F,B:PRINT "COLOR";
150 NEXT B:NEXT F
160 X$=INKEY$:IF X$="" THEN GOTO 160

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