Mbase6 - Memory Base Address; Mbase6 - Memory Base Address Register - Intel CELERON PROCESSOR P4505 - DATASHEET ADDENDUM Datasheet

6.2.15

MBASE6 - Memory Base Address

B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
This register controls the CPU to PCI Express-G non-prefetchable memory access
routing based on the following formula:
MEMORY_BASE=< address =<MEMORY_LIMIT
The upper 12 bits of the register are read/write and correspond to the upper 12
address bits A[31:20] of the 32-bit address. The bottom 4 bits of this register are read-
only and return zeroes when read. This register must be initialized by the configuration
software. For the purpose of address decode address bits A[19:0] are assumed to be 0.
Thus, the bottom of the defined memory address range is aligned to a 1-MB boundary.
Table 38.

MBASE6 - Memory Base Address Register

Bit Access Default
15:4 RW
3:0 RO
® TM
Intel Core i7-660UE, i7-620LE/UE, i7-610E, i5-520E, i3-330E and Intel
Datasheet Addendum
96
RST/
Value PWR
FFFh Core Memory Address Base (MBASE)
Corresponds to A[31:20] of the lower limit of the memory
range that is passed to PCI Express-G.
0h Core Reserved
Processor Configuration Registers
0/6/0/PCI
20-21h
FFF0h
RO; RW
16 bits
Description
® ®
Celeron Processor P4505, U3405 Series
August 2010
Document Number: 323178-003