F65510

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


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BIT MASK REGISTER (GR08)
Read/Write at I/O Address 3CFh
Index 08h
Group 1 Protection
D7 D6 D5 D4 D3 D2 D1 D0
Bit Mask
0=Immune to change
1=Change permitted
7-0
Bit Mask
This bit mask is applicable to any data
written by the CPU, including that subject to
a rotate, logical function (AND, OR, XOR),
Set/Reset, and No Change.
execute a proper read-modify-write cycle
into displayed memory, each byte must first
be read (and latched by the VGA), the Bit
Mask register set, and the new data then
written. The bit mask applies to all four
planes simultaneously.
0 The corresponding bit in each of the
four memory planes is written from
the corresponding bit in the latches
1 Unrestricted manipulation of the
corresponding data bit in each of the
four memory planes is permitted
Revision 0.7
In order to
65
Graphics Controller Registers
Preliminary 65510