AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 170

• Manufacturer Part Number: AM79C976
• Description: PCnet-PRO 10/100 Mbps PCI Ethernet Controller
• Manufacturer: Advanced Micro Devices

SVID_A: PCI Subsystem Vendor ID Alias Register
Offset 1B6h
This register is a writable alias of the Subsystem Ven-
dor ID field at offset 2Ch in PCI configuration space,
which is read only. The purpose of this register is to
TEST0: Test Register
Offset 1A8h
170
31:18
16:14
15-0
7:6
Bit
Bit
17
13
12
11
10
9
8
5
4
3
2
1
0
BFD_SCALE_DOWN
RTYTST_RANGEN
RTYTST_BUMP
RTYTST_SLOT
MFSM_RESET
RTYTST_OUT
Name
LEDCHTTST
SERRLEVEL
SVID
EEBUSY_T
CBIO_EN
ANTST
Name
TSEL
RES
RES
RES
RES
Table 80. SVID: PCI Subsystem Vendor ID Shadow Register
Subsystem Vendor ID. SVID is used together with the PCI Subsystem ID Register to uniquely
identify the add-in board or subsystem the Am79C976 controller is used in. Subsystem Vendor IDs
can be obtained form the PCI SIG. A value of 0 (the default) indicates that the Am79C976 controller
does not support subsystem identification. SVID is aliased to the PCI configuration space register
Subsystem Vendor ID (offset 2Ch).
This register is an alias of BCR23 and of the PCI configuration space Subsystem Vendor
ID field at offset 2Ch.
Factory test bits; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bits; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bits; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Factory test bit; must be 0 for normal operation.
Table 81. TEST0: Test Register
P R E L I M I N A R Y
Am79C976
allow the PCI Subsystem Vendor ID value to be loaded
from the serial EEPROM.
The contents of this register are cleared to 0 when the
RST pin is asserted, before the serial EEPROM is
read, and after a serial EEPROM read error.
This register is used for factory test purposes only. All
bits must be zero for normal operation.
Description
Description
8/01/00