B69000 Asiliant Technologies, B69000 Datasheet - Page 329

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

D-4
32x32x2bpp & 64x64x2bpp AND/XOR Pixel Plane Modes
These two modes are designed to follow the Microsoft Windows
provides two colors that may be used to draw the cursor, a third color for transparency (which allows the
main display image behind the cursor to show through) and a fourth color for inverted transparency (which
allows the main display image behind the cursor to show through, but with its color inverted). Each pixel
position within the cursor is defined by the combination of two bits of data, each of which is stored in planes
referred to as the “AND” plane and the “XOR” plane.
In the 32x32x2bpp AND/XOR pixel plane mode, it is possible to have up to 16 different 256byte patterns
stored in a 4KB memory space starting at the base address specified in the low and high base address
registers for the given cursor. In 64x64x2bpp AND/XOR pixel plane mode, only up to 4 different 1KB
patterns may be stored.
The following tables show how the cursor data is organized in memory for each of these two modes:
&+,36
69000 Databook
Offset
0FCh
FFCh
00Ch
0F0h
0F4h
0F8h
FF8h
32x32x2bpp AND/XOR Pixel Plane Mode
000h
004h
008h
010h
014h
100h
104h
Hardware Cursor and Pop Up Window
...
...
Subject to Change Without Notice
Table D-1: Memory Organization
Plane
XOR
XOR
XOR
XOR
XOR
XOR
AND
AND
AND
AND
AND
AND
AND
AND
...
...
31-0 on line 30 of pattern 0
31-0 on line 31 of pattern 0
31-0 on line 30 of pattern 0
31-0 on line 31 of pattern 0
31-0 of line 30 of pattern 1
31-0 of line 31 of pattern 1
31-0 on line 0 of pattern 0
31-0 on line 1 of pattern 0
31-0 on line 0 of pattern 0
31-0 on line 1 of pattern 0
31-0 on line 2 of pattern 0
31-0 on line 3 of pattern 0
31-0 on line 0 of pattern 1
31-0 on line 1 of pattern 1
Pixels
...
...
cursor data plane structure, which
Revision 1.3 8/31/98