Adaptec 1737100 Programmer Manual - Page 135
Reserved, EtherFifoPtr[12:0], EtherFifoSpace[12:0]
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Page 135 highlights
Register Descriptions BacDmaDiagnostic2 Register Type: R Internal Registers Subgroup: PCI Extra Registers Byte Address: 0118h - 011Bh This register provides information about the current DMA transfer and is used for diagnostic purposes only. All values in the register are synchronized to the Ethernet clock. Table 7-79. BacDmaDiagnostic2 Register Reset Bit(s) rw Value Description/Function 31:29 r 0 Reserved: Always read as 0. 28:16 r 1X EtherFifoPtr[12:0]: Indicates the byte address of the current DMA requester FIFO pointer. 15:13 r 0 Reserved: Always read as 0. 12:0 r X EtherFifoSpace[12:0]: Indicates the actual number of data bytes in the FIFO during a DMA read operation, or the number of empty bytes in the FIFO during a DMA write operation. This information is provided by the BAC to the DMA requester module during an active DMA transfer. 7-63
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