Adaptec 1737100 Programmer Manual - Page 28
ISL CRC error
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AIC-6915 Ethernet LAN Controller Programmer's Manual Table 2-8. Receive Completion Descriptor (Word 1) Bit(s) Description/Function Status2 field 31 Perfect - destination address matches one of the 16 predefined "perfect" addresses. 30 Hash - hashed destination address matches a bit set in the hash table 29 CRC Error - TRUE if the packet had a CRC error. [PE-15 CRC error] 28 ISL CRC error - TBD 27 Dribble - TRUE if the packet contains a noninteger number of bytes (i.e. extra bits or an extra nibble). 26 Receive Code Violation - An illegal 4B/5B code was received in the packet. 25 Vlan Frame - TRUE if the packet's tag matched the tag programmed in the MAC VlanType register. 24 ChecksumOk - If set, the packet is a TCP or UDP packet, the checksum was checked and is good. 23 ChecksumBad - If set, the packet is a TCP or UDP packet, the checksum was checked and is bad 22 PartialChecksumValid - If set, the partial checksum is valid 21 Fragmented - If set, the frame was fragmented 20 TcpFrame - If set, the frame was a TCP frame 19 UdpFrame - If set, the frame was a UDP frame 18:16 FrameType - 0=Unknown, 1=IPv4, 2=IPv6, 3=IPX, 4=Icmp, 5=Unsupported Status3 field 15 IslFrame - If set, the frame is an ISL frame, meaning that the first 5 bytes of its destination are 01:00:0C:00:00. 14 PauseFrame - If set, the frame is a Pause MAC Control frame as defined in the IEEE 802.3x specification. 13 ControlFrame - If set, the frame is a MAC control frame other than a pause frame as defined in the IEEE 802.3 specification. 12 Header - If set, the completion descriptor is for a frame header. 11 Trailer - If set, the completion descriptor is for the remaining data in a frame whose header was transferred. StartIndex field 10:0 StartIndex - Index of the first buffer used in the buffer queue. This field is only important when both receive descriptor queues are being used. 2-8