Intel 82544GC/EI Network Card User Manual


 
Software Developer’s Manual 369
Register Descriptions
Table 13-143. RDFT Register Bit Description
13.8.3 Receive Data FIFO Head Saved Register
RDFHS (02420h; R/W)
This register stores a copy of the Receive Data FIFO Head register in case the internal register
needs to be restored. This register is available for diagnostic purposes only, and should not be
written during normal operation.
Table 13-144. RDFHS Register Bit Description
13.8.4 Receive Data FIFO Tail Saved Register
RDFTS (02428h; R/W)
This register stores a copy of the Receive Data FIFO Tail register in case the internal register needs
to be restored. This register is available for diagnostic purposes only, and should not be written
during normal operation.
31 13 12 0
Reserved FIFO Tail
Field Bit(s)
Initial
Value
Description
FIFO Tail 12:0 0b Receive FIFO Tail pointer.
Reserved 31:13 0b Reads as 0b. Should be written to 0b for future compatibility.
31 13 12 0
Reserved FIFO Head
Field Bit(s)
Initial
Value
Description
FIFO Head 12:0 0b A “saved” value of the Receive FIFO Head pointer.
Reserved 31:13 0b Reads as 0b. Should be written to 0b for future compatibility.