B69000 Asiliant Technologies, B69000 Datasheet - Page 190

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XR80
read/write at I/O address 3D7h with index at I/O address 3D6h set to 80h
7
6
5
Note:
4
3
Note:
2
&+,36
DAC Select
6-Bit/8-Bit
(0)
7
6-Bit/8-Bit DAC Select
0: All three D-to-A converters are set for 6-bit operation. This is the default after reset.
1: All three D-to-A converters are set for 8-bit operation.
Reserved
This bit always returns the value of 0 when read.
Pixel Averaging Enable
Pixel averaging causes the red, green and blue color component values of a replicated pixel created
by the horizontal stretching process to be averaged with those of the next pixel.
0: Disables pixel averaging. This is the default after reset.
1: Enables pixel averaging.
The pixel averaging feature applies only to flat panel displays, not CRT’s, and it applies only when
horizontal stretching is active (see the description of the Horizontal Stretching Register, FR41, for
more details).
Alternate Hardware Cursor Enable
0: Disables hardware cursor.
1: Enables hardware cursor.
Extended Status Read Enable
When enabled, the extended status read feature changes the functionality of three of the palette
registers in order to allow the status of the internal state machines and values of the red and green
data in the input holding register to be read. The affected palette registers and their alternate
functions are as follows:
0: Disable extended status read feature. This is the default after reset.
1: Enable extended status read feature.
This feature must be disabled to permit normal accesses to the registers and color data locations
within the palette.
Flat Panel Overscan Color Enable
0: Disable the use of the flat panel overscan color (Overscan, bit 1). This is the default after reset.
1: Enable the use of the flat panel overscan color (Overscan, bit 1).
69000 Databook
Pixel Pipeline Configuration 0 Register
Reserved
Pixel Data Mask Register (PALMASK)
Palette Write Mode Index Register (PALWX)
Palette State Register (PALSTATE)
(0)
6
Affected Register
Averaging
Pixel
(0)
5
Subject to Change Without Notice
Alt Hardware
Cursor En
Extension Registers
(0)
4
Status Read
Extended
Returns the value of the red pixel data currently in the
data holding register.
Returns the value of the green pixel data currently in
the data holding register.
Returns the status of the internal state machines in
bits 7-2.
(0)
3
Flat Panel
Overscan
(0)
2
Alternate Function
Overscan
CRT
(0)
Revision 1.3 8/31/98
1
Palette Addr
Select
(0)
0
14-23