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- mode3
- O10
- R4 0 637 185
- O11
- R8 2 633 183
- O10
- R12 4 629 181
- mode3
- O11
- text/30 12 0 1 1
- The yoke can deflect the beam to
- hit any chosen location on the
- screen.
- A pattern of control is
- applied. First, the beam is
- deflected to aim at the top left
- corner of the screen. Then it is
- moved from left to right. When it
- hits the right edge, it is turned
- off, and aimed at the left edge
- again, but a little bit lower.
- Then it is once again swept from
- left to right. This is repeated
- over and over again until the beam
- sweeps the bottom row from left to
- right. The whole procedure
- ~
- text/333 12 0 1 1
- happens again and again 60 times
- a second.
- A monochrome picture is entirely
- composed of dots, so anywhere there
- is to be a dot, the gun is
- turned on during its sweep, and
- where the picture is supposed
- to be dark, it is turned off.
- The dots slowly fade out. But
- if the picture stays the same,
- they are relit when the beam
- comes across again. If the
- picture changes, a new pattern
- of dots are lit up.
- ~
- text/356/96
- If you have a CGA monitor,
- the graphics resolution is 640
- dots across by 200 vertically.
- Each sweep of the gun can
- light up any of 640 locations
- from left to right. The gun
- makes a total of 200 sweeps
- working from top to bottom.
- ~
- mode3
- O10
- L316 13 316 169
-