The mediaopt option can also be used to enable full-duplex operation. Not spec- ifying full-duplex implies half-duplex mode. Skip site navigation 1 Skip section navigation 2 Header And Logo. Others use different receiver filter programming mechanisms. The dc driver supports the following media options: This workaround has a negligible impact on transmit performance. At least one supports only chained DMA descriptors most support both chained descriptors and contiguously allocated fixed size rings.
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Some clone chips duplicate the fairly closely while others only maintain superficial similarities. Others use different receiver filter programming mechanisms. For more information on configuring this device, see ifconfig 8. The dc driver does its best to provide generalized support for all of these chipsets in order to keep special case code to a minimum.
Xerox Phaser 3400 Internal NIC 10/100 Base T Network Interface Card 097S02722
The dc driver detects this condition and will salvage the frame; however, it incurs a serious performance asux in the process. If you power down your system prior to booting FreeBSD, the card should be configured correctly.
Note that the baseTX media type may not be available on certain Intel adapters which support 10Mbps media attachments only. The dc driver supports the following media options: The dc driver programs 82c and 82c PNIC chips to use the store and forward setting for the transmit start threshold by default.
The PNIC chips also sometimes generate a transmit underrun error when the driver attempts to download the receiver filter setup frame, which can result in the receive filter being incorrectly programmed. Some operating systems place the controller in low power mode when shutting down, and some PCI BIOSes fail to bring the chip out of this state before as88141 it. The numbers are documented in the app notes, but the exact meaning of the bits is not.
TX underrun — using store and forward mode The device continued to generate transmit underruns even after all possible transmit start threshold settings had been tried, so the driver programmed the chip for store and forward mode.
The A does not exhibit this problem.
Skip site navigation 1 Skip section navigation 2 Header And Logo. The dc driver will watch for this condition and requeue the setup frame until it is transfered successfully.
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Some chips especially the PNIC also have peculiar bugs. The dc driver supports the following media types: Davicom DM data sheethttp: These chips are used by many vendors which makes it difficult to provide a complete list of all supported cards.
This workaround has a negligible impact on transmit performance. Note that this condition only occurs when warm booting from another oper- ating system.
All of the clone chips are based on the design with various modifications. This system configuration variable can be set in the Open Firmware boot monitor using the setenv command or by eeprom 8.
Consequently, autonegoti- ation is not currently supported for this chipset: At least one supports only chained DMA descriptors most support both chained descriptors and contiguously allocated fixed size rings. Some support only MII media attach- ments. If you see this message at boot time and the driver fails to attach the device as a network interface, you will have to perform a second warm boot to have the device properly configured. The mediaopt option can also be used to enable full-duplex operation.
The transmitter works but the receiver tends to produce many unexplained errors leading to very poor overall performance.
The controller loses all of its PCI configuration in the D3 state, so if the BIOS does not set it back to full power mode in time, it will not be able to configure it correctly. All other modes on the A seem to work cor- rectly.
The interface will operate in half duplex mode if this media option is not specified. The also offers several receive filter program- ming options including perfect filtering, inverse perfect filtering and hash table filtering.
Not spec- ifying full-duplex implies half-duplex mode. Intel Hardware Reference Manualhttp: Want to link to this manual page?