F65510

Manufacturer Part NumberF65510
DescriptionControllers, Flat Panel VGA Controller
ManufacturerIntel Corporation
F65510 datasheet
 


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Page 42/154:

CGA COLOR SELECT REGISTER (COLOR)

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CGA COLOR SELECT REGISTER (COLOR)

Read/Write at I/O Address 3D9h
D7 D6 D5 D4 D3 D2 D1 D0
Color bit-0 (Blue)
Color bit-1 (Green)
Color bit-2 (Red)
Color bit-3 (Intensity)
Intensity Enable
Color Set Select
Reserved
This register is effective only in CGA modes. It is
accessible if CGA emulation mode is selected or the
extension registers are enabled. This register may
also be read or written as an Extension Register
(XR7E). It is cleared by RESET.
3-0
Color
320x200 4-color: Background Color (color
when the pixel value is 0)
The foreground colors (colors when the
pixel value is 1-3) are determined by bit-5 of
this register.
Revision 0.7
CGA / Hercules Registers
640x200 2-color: Foreground Color (color
The background color (color when the pixel
value is 0) is black.
4
Intensity Enable
Text Mode:
320x200 4-color:
640x200 2-color:
5
Color Set Select
This bit selects one of two available CGA
color palettes to be used in 320x200
graphics mode (it is ignored in all other
modes) according to the following table:
Pixel
Color Set
Value
0
0 0
Color
per bits 0-3
0 1
Green
1 0
Red
1 1
Brown
7-6
Reserved (0)
38
when the pixel value is 1)
Enables
intensified
background colors
Enables
intensified
colors 0-3
Don't care
Color Set
1
Color
per bits 0-3
Cyan
Magenta
White
Preliminary 65510