Technical information

7-40
AIC-6915 Ethernet LAN Controller Programmer’s Manual
TxDescQueueHighAddr Register
Type: R/W
Internal Registers Subgroup: Ethernet Functional Registers
Byte Address: 9Ch - 9Fh
TxDescQueueProducerIndex Register
Type: R/W
Internal Registers Subgroup: Ethernet Functional Registers
Byte Address: A0h- A3h
Table 7-49. TxDescQueueHighAddr Register
Bit(s) rw
Reset
Value Description/Function
31:0 r/w 0
TxDescQueueHighAddr[31:0]:
Contains the upper 32-bits of
address of the transmit descriptor queues when using 64-bit
addressing.
Table 7-50. TxDescQueueProducerIndex Register
Bit(s) rw
Reset
Value Description/Function
31:27 r 0 Reserved: Always read as 0.
26:16 r/w 0
HiPrTxProducerIndex
Written by the software driver and read by
the AIC-6915. When the software driver wants to transmit a frame, it
adds the frame buffer descriptor to the low-priority queue, then
updates the Producer Index to point to the next empty location in
the queue.
15:11 r 0
Reserved:
Always read as 0.
10:0 r/w 0
LoPrTxProducerIndex:
Written by the software driver and read by
the AIC-6915. When the software driver wants to transmit a frame, it
adds the frame buffer descriptor to the low-priority queue, then
updates the Producer Index to point to the next empty location in
the queue.