CSR125^ MAC Enhanced Configuration Control
n Running Registers
These registers are intended to be used by the device
driver software after the Am79C978 controller is run-
ning to access status information and to pass control
information.
BCR2^
BCR4^
BCR5^
BCR6^
BCR7^
BCR9^
BCR18^
BCR19
BCR20
BCR22^
BCR23^
BCR24^
BCR25^
BCR26^
BCR27^
BCR32^
BCR33^
BCR35^
BCR36
Miscellaneous Configuration
LED0 Status
LED1 Status
The following is a list of the registers that would typi-
cally need to be periodically read and perhaps written
during the normal running operation of the Am79C978
controller within a system. Each of these registers con-
tains control bits, or status bits, or both.
LED2 Status
LED3 Status
Full-Duplex Control
Bus and Burst Control
EEPROM Control and Status
Software Style
RAP
Register Address Port
CSR0
Controller Status
CSR3
Interrupt Masks and Deferral Control
Test and Features Control
Extended Control and Interrupt
Extended Control and Interrupt2
Missed Frame Count
PCI Latency
CSR4
PCI Subsystem Vendor ID
PCI Subsystem ID
SRAM Size
CSR5
CSR7
CSR112
CSR114
BCR32
BCR33
BCR34
SRAM Boundary
Receive Collision Count
SRAM Interface Control
Internal PHY Control and Status
Internal PHY Address
PCI Vendor ID
Internal PHY Control and Status
Internal PHY Address
Internal PHY Management Data
n Test Registers
PCI Power Management Capabilities
(PMC) Alias Register
These registers are intended to be used only for testing
and diagnostic purposes. Those registers not included
in any of the above lists can be assumed to be intended
for diagnostic purposes.
BCR37
BCR38
BCR39
BCR40
BCR41
BCR42
BCR43
BCR44
PCI DATA Register 0 (DATA0) Alias
Register
PCI DATA Register 1 (DATA1) Alias
Register
PCI Configuration Registers
PCI Vendor ID Register
Offset 00h
PCI DATA Register 2 (DATA2) Alias
Register
The PCI Vendor ID register is a 16-bit register that iden-
tifies the manufacturer of the Am79C978 controller.
AMD’s Vendor ID is 1022h. Note that this Vendor ID is
not the same as the Manufacturer ID in CSR88 and
CSR89. The Vendor ID is assigned by the PCI Special
Interest Group.
PCI DATA Register 3 (DATA3) Alias
Register
PCI DATA Register 4 (DATA4) Alias
Register
PCI DATA Register 5 (DATA5) Alias
Register
The PCI Vendor ID register is located at offset 00h in
the PCI Configuration Space. It is read only.
PCI DATA Register 6 (DATA6) Alias
Register
This register is the same as BCR35 and can be written
by the EEPROM.
PCI DATA Register 7 (DATA7) Alias
Register
PCI Device ID Register
Offset 02h
BCR45
BCR46
BCR47
BCR48
BCR49
OnNow Pattern Matching Register 1
OnNow Pattern Matching Register 2
OnNow Pattern Matching Register 3
LED4 Status
The PCI Device ID register is a 16-bit register that
helps identify the Am79C978 controller within AMD's
product line. The Am79C978 Device ID is 2001h. Note
that this Device ID is not the same as the part number
in CSR88 and CSR89. The Device ID is assigned by
PHY Select
102
Am79C978
AMD [ AMD ]
