Intel PCI User Manual
302
Software Developer’s Manual
Register Descriptions
13.4.25
Receive Descriptor Base Address Low
RDBAL (02800h;R/W)
This register contains the lower bits of the 64-bit descriptor base address. The four low-order
register bits are always ignored. The Receive Descriptor Base Address must point to a 16-byte
register bits are always ignored. The Receive Descriptor Base Address must point to a 16-byte
aligned block of data.
Table 13-70. RDBAL Register Bit Description
13.4.26
Receive Descriptor Base Address High
RDBAH (02804h; R/W)
This register contains the upper 32 bits of the 64-bit Descriptor Base Address.
Table 13-71. RDBAH Register Bit Description
31
4 3
0
RDBAL
0
Field
Bit(s)
Initial
Value
Value
Description
0
3:0
0b
Ignored on writes. Returns 0b on reads.
RDBAL
31:4
X
Receive Descriptor Base Address Low.
31
0
RDBAH
Field
Bit(s)
Initial
Value
Value
Description
RDBAH
31:0
X
Receive Descriptor Base Address [63:32]