Adaptec 1737100 Programmer Manual - Page 41

bit. Always 3'b101 for Transmit Complete Entry.

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Transmit Architecture If the AIC-6915 is programmed to transmit two words (8 bytes), the second word (bit 6332) is the InterruptStatus register content. Table 3-8. Transmit Completion Queue Entry Type = Transmit Complete Entry 31 29 28 16 15 14 0 Type Transmit Status Pr i Index s Type -3 bit. Always 3'b101 for Transmit Complete Entry. s Transmit Status - 13 bits. The bits are defined as Bit 12: Transmit previously paused. Bit 11: Pause control frame transmitted. Bit 10: Control frame transmitted. Bit 9: Transmit abort due to FIFO underrun. Bit 8: Transmit abort due to long frame. Bit 7: Transmit abort due to late collision. Bit 6: Transmit abort due to excessive collision. Bit 5: Transmit abort due to excessive deferral. Bit 4: Transmit packet deferred. Bit 3: Packet transmitted successfully. Bit 2: Transmit field length out of range error. Bit 1: Transmit field length check error. Bit 0: Transmit CRC error. s Pri - 1 bit. Indicates a high- or low-priority queue. s Index - 15 bits. Descriptor Queue Consumer Index points to the beginning of a packet in the Descriptor Queue. It is an 8-byte index, incremented by 1 every 8 bytes. If the buffer/frame descriptor has a Skip field, the index points to the beginning of the Skip field. If the AIC-6915 is programmed to transmit two words (8 bytes), the second word (bit 6332) is the InterruptStatus register content. Ì 3-11

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3-11
Transmit Architecture
If the AIC-6915 is programmed to transmit two words (8 bytes), the second word (bit 63-
32) is the InterruptStatus register content.
■
Type
-3 bit. Always 3’b101 for Transmit Complete Entry.
■
Transmit Status
- 13 bits. The bits are defined as
Bit 12: Transmit previously paused.
Bit 11: Pause control frame transmitted.
Bit 10: Control frame transmitted.
Bit 9: Transmit abort due to FIFO underrun.
Bit 8: Transmit abort due to long frame.
Bit 7: Transmit abort due to late collision.
Bit 6: Transmit abort due to excessive collision.
Bit 5: Transmit abort due to excessive deferral.
Bit 4: Transmit packet deferred.
Bit 3: Packet transmitted successfully.
Bit 2: Transmit field length out of range error.
Bit 1: Transmit field length check error.
Bit 0: Transmit CRC error.
■
Pri
- 1 bit. Indicates a high- or low-priority queue.
■
Index
- 15 bits. Descriptor Queue Consumer Index points to the beginning of a
packet in the Descriptor Queue. It is an 8-byte index, incremented by 1 every 8 bytes.
If the buffer/frame descriptor has a Skip field, the index points to the beginning of
the Skip field.
If the AIC-6915 is programmed to transmit two words (8 bytes), the second word (bit 63-
32) is the InterruptStatus register content.
Table 3-8. Transmit Completion Queue Entry Type = Transmit Complete Entry
31
29 28
16 15 14
0
Type
Transmit Status
Pr
i
Index