M69000 Asiliant Technologies, M69000 Datasheet - Page 298

• Manufacturer Part Number: M69000
• Manufacturer: Asiliant Technologies

Specifications of M69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

BR09
Transparency Key Register
read/write at memory space offset 0x400024h
word or doubleword accessible
31-24
23-0
&+,36
31
15
Reserved
Source Expansion Background Color & Transparency Key Bits 23-0
30
14
69000 Databook
Source Expansion Background Color &
29
13
These bits always return 0 when read.
These 24 bits are optionally used to specify the background color for the color expansion
of monochrome source data (depending on the setting of bit 27 of BR03). When bit 27 of
BR03 is set so that this register is used in the color expansion of monochrome source data,
BR01 is used to specify the background color for the color expansion of monochrome
pattern data.
These 24 bits are also optionally used to specify the key color for whichever form of color
transparency is selected via bits 16-15 of BR04 (depending on the setting of bit 27 of
BR03).
Whether bits 7-0, 15-0 or 23-0 of this register are used in both the color expansion and color
transparency processes depends upon the color depth to which the BitBLT engine has
been set.
(0000:0000)
28
Reserved
12
Source Expansion Background Color & Transparency Key Bits 15-0
27
11
26
10
Subject to Change Without Notice
25
9
(xxxx:xxxx:xxxx:xxxx)
BitBLT Registers
24
8
Src Expansion Background Color & Transparency Key
23
7
22
6
21
5
(xxxx:xxxx)
Bits 23-16
20
4
19
3
Revision 1.3 8/31/98
18
2
17
1
17-15
16
0