B69000 Asiliant Technologies, B69000 Datasheet - Page 288
B69000
Manufacturer Part Number
B69000
Description
Manufacturer
Asiliant Technologies
Datasheet
1.B69000.pdf
(360 pages)
Specifications of B69000
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BR03
read/write at memory space offset 0x40000Ch
word or doubleword accessible
31-28
27
26-24
&+,36
31
15
Reserved
(00)
Reserved
These bits always return 0 when read.
Monochrome Source Expansion Color Register Select
Monochrome Source Scanline Data Alignment
30
14
Reserved
69000 Databook
(0000)
Monochrome Source Control Register
Monochrome Source Data Right Clipping
29
13
0: This causes the background and foreground colors for the color expansion of
monochrome source data to be specified by BR01 and BR02, respectively.
1: This causes the background and foreground colors for the color expansion of
monochrome source data to be specified by BR09 and BR0A, respectively.
Note: These bits are used only when the source data is monochrome.
These 3 bits are used to configure the BitBLT engine for the byte alignment of each
scanline’s worth of monochrome source data during a BitBLT operation, as each scanline’s
worth of monochrome source data is received.
Refer to the section describing the BitBLT engine for further details concerning the
requirements for how monochrome source data must be organized.
28
12
26 25 24
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Bit
Exp
Src
27
(x)
11
(xx:xxxx)
Reserved
Bit-Aligned
Byte-Aligned
Word-Aligned
Doubleword-Aligned
Quadword-Aligned
Reserved
Reserved
26
10
Specified Monochrome Source Data Alignment
Subject to Change Without Notice
Mono Src Align
(xxx)
25
9
BitBLT Registers
24
8
23
Reserved
Reserved
7
(00)
(00)
22
6
Monochrome Source Data Initial Discard
Monochrome Source Data Left Clipping
21
5
20
4
19
(xx:xxxx)
(xx:xxxx)
3
Revision 1.3 8/31/98
18
2
17
1
17-5
16
0
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