B69000 Asiliant Technologies, B69000 Datasheet - Page 192

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XR81
read/write at I/O address 3D7h with index at I/O address 3D6h set to 81h
7-5
4
Note:
3-0
&+,36
7
Reserved
These bits always return the value of 0 when read.
VGA Standard Signal Delay Enable
0: The CRT Display Enable and CRT Blank are delayed for compatibility with the VGA standard.
The behavior of CR00 remains compatible with the VGA standard, inasmuch as the value placed
there must be subtract by 5. This is the default after reset.
1: The CRT Display Enable and CRT Blank are not delayed. The behavior of CR00 is altered in a
way that is different from the VGA standard, inasmuch as the value placed there is not to be
subtracted by 5.
This enables/disables the delay of signals relative to the CRT horizontal and vertical sync signals.
When the flat panel display engine is enabled (i.e., when bit 1 of FR01 is set to 1), then this bit is
ignored and no such delay takes place.
Graphics System Color Depth
69000 Databook
Pixel Pipeline Configuration 1 Register
Reserved
(000)
3 2 1 0
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 x x x
6
Bits
Configures the CRT pipeline for standard VGA text and graphics modes, and for 1bpp,
2bpp and 4bpp extended graphics modes. This is the default after reset.
Reserved
Configures the CRT pipeline for 8bpp extended graphics modes.
Reserved
Configures the CRT pipeline for 16bpp extended graphics modes wherein the graphics
data follows a fixed Targa-compatible 5-5-5 RGB format.
Configures the CRT pipeline for 16bpp extended graphics modes wherein the graphics
data follows a fixed XGA-compatible 5-6-5 RGB format.
Configures the CRT pipeline for packed 24bpp extended graphics modes wherein only
3 bytes are allocated for each pixel.
Configures the CRT pipeline for non-packed 24bpp (32bpp) extended graphics modes
wherein 4 bytes are allocated for each pixel, so that the graphics data for each pixel is
doubleword-aligned. The 4th byte allocated for each pixel is unused.
Reserved
5
Subject to Change Without Notice
VGA Std
Extension Registers
Delay
(0)
4
Color Depth Selected for Graphics System
3
Graphics System Color Depth
2
(0000)
Revision 1.3 8/31/98
1
0
14-25