General-purpose registers, Pci registers, General-purpose registers -47 – Motorola MVME2300 Series User Manual
Page 117: Pci registers -47
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
. 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
0 1 2 3 4 5 6 7 8 9
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