Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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3.4.
Indirect VGA and Extended VGA Register Indices
Programming an index value into the appropriate SRX, GRX, ARX, or CRX register indirectly accesses
the registers listed in this section. The index and data register address locations are listed in the previous
section. Additional details concerning the indirect access mechanism are provided in the VGA and
Extended VGA Registers Chapter (see SRxx, GRxx, ARxx or CRxx sections).
the registers listed in this section. The index and data register address locations are listed in the previous
section. Additional details concerning the indirect access mechanism are provided in the VGA and
Extended VGA Registers Chapter (see SRxx, GRxx, ARxx or CRxx sections).
Table 4.
2D Sequence Registers (3C4h / 3C5h)
Index Sym
Description
00h SR00
Sequencer
Reset
01h SR01
Clocking
Mode
02h
SR02
Plane / Map Mask
03h SR03
Character
Font
04h SR04
Memory
Mode
07h
SR07
Horizontal Character Counter Reset
Table 5.
2D Graphics Controller Registers (3CEh / 3CFh)
Index Sym
Register
Name
00h
GR00
Set / Reset
01h
GR01
Enable Set / Reset
02h GR02
Color
Compare
03h GR03
Data
Rotate
04h
GR04
Read Plane Select
05h GR05
Graphics
Mode
06h GR06
Miscellaneous
07h GR07
Color
Don’t
Care
08h GR08
Bit
Mask
10h GR10
Address
Mapping
11h GR11
Page
Selector
14:1Fh GR[14:1F] Software
Flags