Motorola MVME2300 Series User Manual Page 117

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Raven Registers
http://www.motorola.com/computer/literature 2-47
2
REN Read Enable. If set, the corresponding MPC slave is
enabled for read transactions.
WEN Write Enable. If set, the corresponding MPC slave is
enabled for write transactions.
WPEN Write-Post Enable. If set, write-posting is enabled for the
corresponding MPC slave.
IOM PCI I/O Mode. If set, the corresponding MPC slave will
generate PCI I/O cycles using spread addressing as
defined in the section on Generating PCI Memory and I/O
Cycles. When clear, the corresponding MPC slave will
generate PCI I/O cycles using contiguous addressing.
General-Purpose Registers
These general-purpose read/write registers are provided for inter-process
message passing or general-purpose storage. They do not control any
hardware.
PCI Registers
The PCI Configuration registers are compliant with the configuration
register set described in the PCI Local Bus Specification, Revision 2.0.
The CONFIG_ADDRESS and CONFIG_DATA registers described in
this section are accessed within PCI I/O space.
Address GPREG0 (Upper) - $FEFF0070
GPREG0 (Lower) - $FEFF0074
GPREG1 (Upper) - $FEFF0078
GPREG1 (Lower) - $FEFF007C
Bit
0123456789
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
Name GPREGx
Operation R/W
Reset $00000000
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