M69000 Asiliant Technologies, M69000 Datasheet - Page 159
M69000
Manufacturer Part Number
M69000
Description
Manufacturer
Asiliant Technologies
Datasheet
1.M69000.pdf
(360 pages)
Specifications of M69000
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12-6
AR13
read at I/O address 3C1h, write at I/O address 3C0h with index at address 3C0h set to 13h
7-4
3-0
&+,36
7
Reserved
Horizontal Pixel Shift
69000 Databook
Horizontal Pixel Panning Register
Bits 3-0 of this register hold a 4-bit value that selects number of pixels by which the image
is shifted horizontally to the left. This function is available in both text and graphics modes.
In text modes with a 9-pixel wide character box, the image can be shifted up to 8 pixels to
the left. In text modes with an 8-pixel wide character box, and in graphics modes other than
those with 256 colors, the image can be shifted up to 7 pixels to the left.
In standard VGA mode 13h (where bit 6 of the Mode Control Register, AR10, is set to 1 to
support 256 colors), bit 0 of this register must remain set to 0, and the image may be shifted
up to only 3 pixels to the left. In this mode, the number of pixels by which the image is
shifted can be further controlled using bits 6 and 5 of the Preset Row Scan Register (CR08).
6
Reserved
Value in
Bits 3-0
0h
1h
2h
3h
4h
5h
6h
7h
8h
5
Subject to Change Without Notice
Attribute Controller Registers
9 Pixel Text
Number of Pixels Shifted
1
2
3
4
5
6
7
8
0
4
8-Pixel Text
& Graphics
Undefined
3
0
1
2
3
4
5
6
7
Horizontal Pixel Shift
2
256-Color
Undefined
Undefined
Undefined
Undefined
Undefined
Graphics
0
1
2
3
Revision 1.3 8/31/98
1
0
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