Motorola MVME2300 Series 用户手册
2-52
Computer Group Literature Center Web Site
Raven PCI Bridge ASIC
2
Revision ID/ Class Code Registers
REVID
Revision ID. Identifies the Raven revision level. This
register is duplicated in the MPC registers.
register is duplicated in the MPC registers.
CLASS
Class Code. Identifies the Raven as follows:
Base Class Code
$06
PCI Bridge Device
Subclass Code
$00
PCI Host Bridge
Program Class Code
$00
Not Used
I/O Base Register
This register controls the mapping of the MPIC control registers in PCI I/O
space.
space.
IO/MEM
IO Space Indicator. This bit is hard-wired to a logic 1 to
indicate PCI I/O space.
indicate PCI I/O space.
Offset
$08
Bit
3
1
1
3
0
0
2
9
9
2
8
8
2
7
7
2
6
6
2
5
5
2
4
4
2
3
3
2
2
2
2
1
1
2
0
0
1
9
9
1
8
8
1
7
7
1
6
6
1
5
5
1
4
4
1
3
3
1
2
2
1
1
1
1
0 9 8 7 6 5 4 3 2 1 0
0 9 8 7 6 5 4 3 2 1 0
Name
CLASS
REVID
Operation
R
R
Reset
$060000
$02
Offset
$10
Bit
3
1
1
3
0
0
2
9
9
2
8
8
2
7
7
2
6
6
2
5
5
2
4
4
2
3
3
2
2
2
2
1
1
2
0
0
1
9
9
1
8
8
1
7
7
1
6
6
1
5
5
1
4
4
1
3
3
1
2
2
1
1
1
1
0 9 8 7 6 5 4 3 2 1 0
0 9 8 7 6 5 4 3 2 1 0
Name
IOBASE
IOBA
RES
IO/M
EM
Operation
R/W
R
R
R
Reset
$0000
$0000
0
1