VT8601 Via, VT8601 Datasheet - Page 41

• Manufacturer Part Number: VT8601
• Description: Slot-1 / Socket-370 PCI North Bridge
• Manufacturer: Via

Device 0 Offset E - Header Type ....................................... RO
Device 0 Offset F - Built In Self Test (BIST) .................... RO
Device 0 Offset 13-10 - Graphics Aperture Base ............ RW
Note:
Revision 1.3 September 8, 1999
31-28 Upper Programmable Base Address Bits....... def=0
27-20 Lower Programmable Base Address Bits ...... def=0
19-0 Reserved
7-0
6-0
7
7HFKQRORJLHV ,QF
Header Type Code ............reads 00: single function
BIST Supported ......reads 0: no supported functions
Reserved
These bits behave as if hardwired to 0 if the
corresponding Graphics Aperture Size register bit
(Device 1 Offset 84h) is 0.
The locations in the address range defined by this
register are prefetchable.
RW RW RW RW RW RW RW RW 1M
RW RW RW RW RW RW RW 0
RW RW RW RW RW RW 0
RW RW RW RW RW 0
RW RW RW RW 0
RW RW RW 0
RW RW 0
RW 0
:H &
:H &R R QQHFW
27 26 25 24 23 22 21 20
7
0
QQHFW
6
0
5
0
0
........................................ always reads 0
................................ always reads 00008
4
0
0
0
3
0
0
0
0
2
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
(This Register)
(Gr Aper Size)
2M
4M
8M
16M
32M
64M
128M
256M
-35-
Device 0 Offset 2D-2C – Subsystem Vendor ID ............. RW
Device 0 Offset 2F-2E – Subsystem ID ............................ RW
Device 0 Offset 37-34 - Capability Pointer ...................... RO
Contains an offset from the start of configuration space.
15-0 Subsystem Vendor ID.........................default = 0000
15-0 Subsystem ID ......................................default = 0000
31-0 AGP Capability List Pointer ........ always reads A0h
Device 0 Bus 0 Header Registers - Host Bridge
VT8601 Apollo ProMedia