F65510

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


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Page 68/154:

MISCELLANEOUS REGISTER

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MISCELLANEOUS REGISTER (GR06)
Read/Write at I/O Address 3CFh
Index 06h
Group 1 Protection
D7 D6 D5 D4 D3 D2 D1 D0
Graphics/Text Mode
Chain Odd/Even Planes
Memory Map Mode
Reserved
0
Graphics/Text Mode
0 Text Mode
1 Graphics mode
1
Chain Odd/Even Planes
This mode can be used to double the address
space into display memory.
1 CPU address bit A0 is replaced by a
higher order address bit. The state of
A0 determines which memory plane
is to be selected:
A0 = 0: select planes 0 and 2
A0 = 1: select planes 1 and 3
0 A0 not replaced
3-2
Memory Map Mode
These bits control the mapping of the dis-
play memory into the CPU address space as
follows (also used in extended modes):
Bit 3
Bit 2
CPU Address
0
0
A0000h-BFFFFh
0
1
A0000h-AFFFFh
1
0
B0000h-B7FFFh
1
1
B8000h-BFFFFh
7-4
Reserved (0)
Revision 0.7
Graphics Controller Registers
COLOR DON'T CARE REGISTER (GR07)
Read/Write at I/O Address 3CFh
Index 07h
Group 1 Protection
D7 D6 D5 D4 D3 D2 D1 D0
3-0
Ignore Color Plane (3-0)
0 This causes the corresponding bit of
the Color Compare register to be a
don't care during a comparison.
1 The corresponding bit of the Color
Compare register is enabled for color
comparison. This register is active in
Read Mode 1 only.
7-4
Reserved (0)
64
Ignore Color Plane 0
Ignore Color Plane 1
Ignore Color Plane 2
Ignore Color Plane 3
Reserved
Preliminary 65510