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MVME3100 Single Board Computer Installation and Use (6806800M28C)
113
RSVD: Reserved for future implementation.
6.1.9 PCI Bus Status Registers
The PCI Bus Status registers provide PCI bus configuration information for each of the PCI
buses.
PCI_A_SPD
PCI bus A speed. Indicates the frequency of PCI bus A.
00: 33 MHz
01: 66 MHz
10: 100 MHz
11: 133 MHz
PCIX_A: PCI-X bus A. A set condition indicates that bus A is operating in
PCI-X mode. A cleared condition indicates PCI mode.
PCI_A_64B: PCI bus A 64-bit. A set condition indicates that bus A is enabled to operate in 64-
bit mode. A cleared condition indicates 32-bit mode.
RSVD: Reserved for future implementation.
Table 6-8 PCI Bus A Status Register
REG PCI Bus A Status Register - 0xE2000004
BIT 76543210
FIELD
RSVD
RSVD
RSVD
RSVD
PCI_A_64B
PCIX_A
PCI_A_SPD
OPERRRRRRRRR
RESET00001X01
Table 6-9 PCI Bus B Status Register
REG PCI Bus B Status Register - 0xE2000005
BIT 76543210