B69000 Asiliant Technologies, B69000 Datasheet - Page 332

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

64x64x2bpp 3-Color and Transparency Mode
This mode provides three colors for drawing the cursor and a fourth color for transparency (which allows the
main display image behind the cursor to show through). Each pixel position in the cursor is defined by the
combination of two bits, stored in planes referred to as plane 0 and plane 1.
In this mode, it is possible to have up to 4 1KB different 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.
The following tables show how the cursor data is organized in memory and the meaning of the two bits for
each pixel position.
&+,36
69000 Databook
Pixel Data
Plane 0
0
0
1
1
Table D-7: Pixel Data 64x64x2bpp 3-Color & Transparency Mode
Pixel Data
Plane 1
64x64x2bpp 3-Color & Transparency Mode
Offset
FFCh
00Ch
3FCh
FF8h
000h
004h
008h
010h
014h
3F0h
3F4h
3F8h
400h
404h
Hardware Cursor and Pop Up Window
...
...
0
1
0
1
Subject to Change Without Notice
Table D-6: Memory Organization
Plane
Color Displayed at the Corresponding Pixel Position
Cursor color 0
Cursor color 1
Transparent
Pixel of the image behind the cursor shows through
Cursor color 3
...
...
0
0
1
1
0
0
0
0
1
1
0
0
1
1
31-0 on line 0 of pattern 0
63-32 on line 0 of pattern 0
31-0 on line 0 of pattern 0
63-32 on line 0 of pattern 0
31-0 on line 1 of pattern 0
63-32 on line 1 of pattern 0
...
31-0 on line 63 of pattern 0
63-32 on line 63 of pattern 0
31-0 on line 63 of pattern 0
63-32 on line 63 of pattern 0
31-0 on line 0 of pattern 1
63-32 on line 0 of pattern 1
...
31-0 on line 63 of pattern 3
63-32 on line 63 of pattern 3
Pixels
Revision 1.3 8/31/98
D-7