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Table 12.2 Extended color calculation ratio 
 Color 
 RAM 
 Mode 
 Line 
 Color screen
Color format 
 Color calculation enable 
 Bull bit value 
 Expanded color calculation ratio 
 Second: Third: Force 
 Image Image Image 
 Second image 
 Third image 
 Force image 
 Second 
 Image 
 Third 
 Image 
 Mode 0
Do not insert Palette
or
RGB format 		Palette
or
RGB format 		− 0 - 4: 0: 0
1 - 2: 0: 0
Insert - Palette
or
RGB format 		Palette
or
RGB format 		0 0 or 1 4: 0: 0
1 0 2: 0: 0
1 1 2: 1: 1 
 Mode 1 
 or 
 Mode 2
Do not insert Palette
or
RGB format 		Palette
Format 		- 0 or 1 - 4: 0: 0
RGB format - 0 - 4: 0: 0
1 - 2: 0: 0
Insert - Palette
Format 		Palette
or
RGB format 		0 or 1 0 or 1 4: 0: 0
RGB format Palette
Format 		0 0 or 1 4: 0: 0
1 0 or 1 2: 0: 0
RGB format 0 0 or 1 4: 0: 0
1 0 2: 0: 0
1 1 2: 1: 1
[Note] When the TV screen mode is high resolution or dedicated monitor mode, the extended color calculation function cannot be used.
When inserting a line color screen, the color format of the second image will be a palette format.
The extended color calculation ratio is for 1/4 of the RGB data.

■ Blur calculation function

The blur calculation function is a function that adds color data in the horizontal direction of a specified single screen at a certain rate, and can produce an effect of blurring a distant background. This function can be used only when the TV screen mode is normal mode and the color RAM mode is mode 0.
ボ For blur calculation, the color data on the specified screen is added to the RGB value multiplied by 1/4 for the following ratios. 

 (color data 2 dots left of display coordinates): (color data 1 dot left of display coordinates): (display coordinates = 1: 1: 2 color data)

And, for the area where the specified screen becomes the top image or the second image, the addition result is forcibly made a second image. By calculating the color of this second image and the top image, you can display a blurred image. Second of the area where the blur calculation specification screen does not become the top image or the second image

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