
8/01/00
Am79C976
193
P R E L I M I N A R Y
1-1/
Bit
Name
Description
31-0
RES
Reserved locations. Written as
zeros and read as undefined.
11+'*<8
Bit
Name
Description
31-16
RES
Reserved locations.
Read as undefined.
15-12
PARTIDL
Lower 4 bits of the Am79C976
controller part number, i.e. 1000b
(8h). PARTIDN and PARTIDL
comprise the 16-bit code for the
Am79C976 controller, which is
0010 0110 0010 1000b (2628h).
This register is exactly the same
as the Device ID register in the
JTAG description. However, this
part number is different from that
stored in the Device ID register in
the PCI configuration space.
PARTIDL is read only. Write op-
erations are ignored.
11-1
MANFID
Manufacturer ID. The 11-bit man-
ufacturer code for AMD is
00000000001b. This code is per
the JEDEC Publication 106-A.
Note that this code is not the
same as the Vendor ID in the PCI
configuration space.
MANFID is read only. Write oper-
ations are ignored.
0
ONE
Always a logic 1.
ONE is read only. Write opera-
tions are ignored.
12+'*''
Bit
Name
Description
31-16
RES
Reserved locations. Read as un-
defined.
15-12
VER
Version. This 4-bit pattern is sili-
con-revision dependent.
VER is read only. Write opera-
tions are ignored.
11-0
PARTIDU
Upper 12 bits of the Am79C976
controller part number, i.e., 0010
0110 0010b (262h).
PARTIDU is read only. Write op-
erations are ignored.
24-22
Bit
Name
Description
31-0
RES
Reserved locations. Written as
zeros and read as undefined.
44!
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
MERRTO
Obsolete function. Writing has no
effect. Read as undefined.
4-
Bit
Name
Description
31-0
RES
Reserved locations. Written as
zeros and read as undefined.
#!
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
MFC
Obsolete function. Replaced by
MIB counter. Writing has no ef-
fect. Read as undefined.
Bit
Name
Description
31-0
RES
Reserved locations. Written as
zeros and read as undefined.
"(
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
RCC
Obsolete function. Replaced by
MIB counter. Writing has no ef-
fect. Read as undefined.
)
Bit
Name
Description