Canon A-200 series Service Manual page 105

• Character Mode
Like the monochrome board, every character to be displayed has one byte of character code
and also one byte of attri bute code.
Functions of attribute byte are identical as the monochrome board.
7 6 5 4 3 2 0
Character Code (Even Address)
R G B
Attribute Code (Odd Address)
I
BL
I I
I
R G B
1
L...----Foreground
Intensity
T
L....-----------Background
Blink
• 320
X
200 Pixels Graphic Mode
In this mode, 4 of 16 colors can be displayed.
Functional assignment for every byte are illustrated as follows.
7 6 5 4 3 2 1 0
C1 CO
C1
CO
C1 CO
C1
CO
First display
element
Second display
element
Third displa
element
y Fourth disp
element
lay
Table 6-17
Colors to be dispalyed are selected with CO and C1 above.
The color selection is done by the IC U19 (LS174).
• 640 x 200 Pixels Graphics Mode
In this high resolution mode, every bit of the V-RAM corresponds every pixel on the screen, and
so, only a black and white mode display can be performed.
1716151 4 131211101
First Display Pixel
--
J
Second Display Pixel
Third Display Pixel
Fourth Display Pixel
Fifth Display Pixel
Sixth Display Pixel
Seventh Display Pixel
Eighth Display Pixel
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