Revision id/ class code registers, I/o base register – Motorola MVME2300 Series User Manual
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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.
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.
IO/MEM
IO Space Indicator. This bit is hard-wired to a logic 1 to
indicate PCI I/O space.
Offset
$08
Bit
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
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
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
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