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Hardware Level VGA and SVGA Video Programming Information Page
Graphics Registers 

        The Graphics Registers are accessed via a pair of registers, the Graphics Address Register and the Graphics Data Register. See the Accessing the VGA Registers section for more details. The Address Register is located at port 3CEh and the Data Register is located at port 3CFh.

 
Set/Reset Register (Index 00h)
7 6 5 4 3 2 1 0
Set/Reset
   
Enable Set/Reset Register (Index 01h)
7 6 5 4 3 2 1 0
Enable Set/Reset
   
Color Compare Register (Index 02h)
7 6 5 4 3 2 1 0
Color Compare
   
Data Rotate Register (Index 03h)
7 6 5 4 3 2 1 0
Logical Operation Rotate Count
   
Read Map Select Register (Index 04h)
7 6 5 4 3 2 1 0
Read Map Select
   
Graphics Mode Register (Index 05h)
7 6 5 4 3 2 1 0
Shift256 Shift Reg. Host O/E Read Mode Write Mode
   
Miscellaneous Graphics Register (Index 06h)
7 6 5 4 3 2 1 0
Memory Map Select Chain O/E Alpha Dis.
   
Color Don't Care Register (Index 07h)
7 6 5 4 3 2 1 0
Color Don't Care
   
Bit Mask Register (Index 08h)
7 6 5 4 3 2 1 0
Bit Mask
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