DEC 21140 A DRIVER

Write the Driver Initialization Function. To achieve this, the driver requires a few external support routines as well as several target-specific parameters. Current applicable release is 1. We have used it to configure the board. Each descriptor can reference one or two memory buffers. Adding a Default Route 4.

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If the link status indicates failure, AUI interface is configured. The driver also and contains error recovery code that handles known device errata related to DMA activity. By reading or writing these registers, a driver can obtain information about the type of the board, the interrupt it uses, the mapping of the chip specific registers, …. If these flags de not set then the speed is set using the SROM settings.

Write the Driver Interrupt Handler 3. Testing the Driver 5. We have chosen to use 7 receive buffers and 1 transmit buffer to optimize memory allocation due to cache and paging problem that will be explained in the section Encountered Problems. This board includes an Ethernet controller based on a DEC chip.

Transmission starts when the frame size within the transmit FIFO is larger than the treshold value. All of the device-specific parameters are passed in the initStr. It does not signify the end of the original string, but that 211440 parameter is null.

Error When Using DEC Based PCI Ethernet

Tapping Into an Interface 4. But concerning the port of the DEC driver into Netboot, we are faced with a problem: This will later be used by the decGetEthernetAdr function.

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If any of the assumptions stated below are not true for your particular hardware, you need to modify the driver before it can operate correctly on your hardware.

On Intel, the memory region cache management is available only if the paging unit is enabled.

Digital Dec 10 Fast Ethernet PCI Network Cards PC AE PD | eBay

The driver uses this value to program register CSR6. On thethe driver configures the 10BASE-T interface by default,waits for two seconds, and checks the status of the link. The chip still has to be programmed to operate in little endian mode as it is on the PCI bus.

Therefore, we had to provide a way to manage the cache. Ddec controls how much data the device can absorb dce load. DEC Driver 7. Understand the network scheduling conventions 3. Then the driver waits for incoming frame to give to the protocol stack or outcoming frame to send on the physical link.

Early versions used National transcievers, but later versions are depopulated ZX boards. If the cpu board hardware automatically swaps all the accesses to and from the PCI bus, then input and output byte stream need not be swapped. Increasing the size of the heap 4.

On Intel target, the chip specific registers can be accessed via 2 methods: Because the DEC chip uses the host memory to store the incoming frame and because the DEC configuration registers are mapped into the PCI address space, we must ensure that the data read or written by the host processor are the ones written or read by the DEC device in the host memory and not old data stored in the cache memory. Write the Driver Attach Function 3.

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RTEMS 4.6.6 On-Line Library

As input, this function expects a string of colon-separated parameters. By reading or writing these registers, a driver can obtain information about the type of the board, the interrupt it uses, the mapping of the chip specific registers, … On Intel target, the chip specific registers can be accessed via 2 methods: Accton EN All three edc types supported.

It is used to translate a physical memory 12140 into a PCI-accessible address. Once this operation performed, the driver is able to extract the information it needs to configure the board internal registers, like the interrupt line, the base address,… The board internal registers will not be detailled here. Write the Driver Statistic-Printing Function 4.