F65510

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


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Page 59/154:

VERTICAL BLANK START REGISTER

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VERTICAL BLANK START
REGISTER (CR15)
Read/Write at I/O Address 3B5h/3D5h
Index 15h
Group 4 Protection
D7 D6 D5 D4 D3 D2 D1 D0
V Blank Start
(Lower 8 bits)
This register is used in all modes.
7-0
Vertical Blank Start
These are the 8 low order bits of a 10-bit
register. The 9th and 10th bits are located in
the CRT Controller Overflow and Maxi-
mum Scan Line Registers respectively.
Together these 10 bits define the scan line
position where vertical blank begins. The
interval between the end of the vertical dis-
play and the beginning of vertical blank is
the bottom border on the screen.
Revision 0.7
CRT Controller Registers
VERTICAL BLANK END
REGISTER (CR16)
Read/Write at I/O Address 3B5h/3D5h
Index 16h
Group 4 Protection
D7 D6 D5 D4 D3 D2 D1 D0
This register is used in all modes.
7-0
Vertical Blank End
These are the 8 low order bits of the scan
line count which specifies the end of Vertical
Blank. If the vertical blank width desired is
Z lines these bits = (Vertical Blank Start +
Z) and 0FFh.
55
V Blank End
(Lower 8 bits)
Preliminary 65510