Intel PCI User Manual

66

IP/TCP Header

Packet Data

Packet Data

Packet Data

HOST Memory

PCI FIFO

Header
Update

Checksum
Calculation

TX Packet FIFO

IP/TCP Header Buf f er

Descriptors f etch

IP/TCP Header

Prototy pe f etch Packet Data Fetch

Header processing

Checksum

Calculations

Data Fetch Pause

Checksum Header

Insertion

Data Fetch

resume

Header processing

Checksum

Calculations

Data Fetch Pause

Checksum Header

Insertion

Time