Adaptec 1737100 Programmer Manual - Page 136
Type: R, Internal Registers Subgroup: PCI Functional Registers, Byte Address: 011Ch - 011Fh
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AIC-6915 Ethernet LAN Controller Programmer's Manual BacDmaDiagnostic3 Register Type: R Internal Registers Subgroup: PCI Functional Registers Byte Address: 011Ch - 011Fh Table 7-80. BACDMADiagnostic3 Register Reset Bit(s) rw Value Description/Function 31:25 r 0 Reserved: Always read as 0. 24 r 0 IllegalDmaReq: This bit is set during a receive DMA request when the host address is not aligned on a (32-bit) word boundary. 23 r 0 TxDmaReq: Is the fifth highest priority DMA request line. By default, it has the same priority as RxDmaReq. If PreferTxDmaReq in the BacControlStatus register is set, TxDmaReq gets higher priority then RxDmaReq. 22 r 0 RxDmaReq: Is the fifth highest priority DMA request line. By default, it has the same priority as TxDmaReq. If PreferRxDmaReq in the BacControlStatus register is set, RxDmaReq gets higher priority than TxDmaReq. 21 r 0 RxStatusReq: Is the fourth highest priority DMA request line and is connected to the receive completion descriptor request line. 20 r 0 TxStatusReq: Is the third highest priority DMA request line and is connected to the transmit completion descriptor request line. 19 r 0 RxDescReq: Is the second highest priority DMA request line and is connected to the receive DMA descriptor request line. 18 r 0 TxDescReq: Is the first and highest priority DMA request line and is connected to the transmit DMA descriptor request line. 17 r 0 TxDmaGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the transmit DMA requester. 16 r 0 RxDmaGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the receive DMA requester. 15 r 0 TxStatusGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the transmit status. 14 r 0 RxStatusGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the receive status. 13 r 0 TxDescGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the transmit descriptors. 12 r 0 RxDescGnt: Specifies that the current (or last if no other transfers since then) DMA grant was given to the receive descriptor. 11:0 r 0 Reserved: Always reads 0. 7-64
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