F65510

Manufacturer Part NumberF65510
DescriptionControllers, Flat Panel VGA Controller
ManufacturerIntel Corporation
F65510 datasheet
 
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®
bit is used to enable the video.
Controller Registers handle internal color lookup
table mapping, text/graphics mode, overscan color,
and color plane enable. The horizontal Pixel Panning
and Pixel Padding Registers control pixel attributes
on screen.
Color palette registers handle CPU reads and writes
to I/O address range 3C6h-3C9h. Inmos IMSG176
(Brooktree BT471/476) compatible registers are
documented in this manual.
EXTENSION REGISTERS
The 65510 defines a set of extension registers which
are addressed with the 7-bit Extension Register
Index. The I/O port address is fixed at 3D6-3D7h
and read/write access is always enabled to improve
software performance.
The extension registers handle a variety of inter-
facing, compatibility, and display functions as
discussed below.
They are grouped into the
following logical groups for discussion purposes:
1. Miscellaneous Registers include the Version
number, Dip Switch, CPU interface, paging
control, memory mode control, and diagnostic
functions.
2. General Purpose Registers handle video blanking
and the video default color.
3. Backwards Compatibility Registers control
Hercules, MDA, and CGA emulation modes.
Write Protect functions are provided to increase
flexibility in providing backwards compatibility.
4. Alternate Horizontal and Vertical Registers
handle all horizontal and vertical timing,
including sync, blank and offset. These are used
for backwards compatibility.
5. Flat Panel Registers handle all internal logic
specific to driving of flat panel displays.
Note: The state of most of the Standard VGA Registers is undefined at reset. All registers specific to the 65510
(Extension Registers) are summarized in the Extension Register Table.
Revision 0.7
The Attribute
32
Registers
Preliminary 65510