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- The de425/de434/de435/de500 driver in this distribution is designed to work
- with the Digital Equipment Corporation series of PCI/EISA ethernet cards
- (DE425, DE434, DE435, DE500) and with all kernels that support PCI.
-
- Auto media detection is provided so that the media choice isn't compiled in
- and is flexible enough to be able to reconfigure on-the-fly. This feature
- hasn't been included for the DE500 unfortunately, due to a potential patent
- dispute. When I get around to implementing the autosense algorithm by myself
- (which could legally be difficult to prove since I'm part of the group that
- has implemented the patented algorithm) you'll have an auto speed selection
- for the de500. If you want the auto speed feature yell at Digital. If enough
- of you do things might change.
-
- The ability to load this driver as a loadable module has been included,
- although I don't recommend its use with PCI, since PCI dynamically allocates
- where the card will go at boot time (i.e. the card would have to be present
- in the system at boot time for its address/IRQ to be assigned).
-
- The performance we've achieved so far has been measured through the 'ttcp'
- tool at 1.06MB/s for TCP and 1.17MB/s for UDP. This measures the total
- stack performance which includes the card, so don't expect to get much
- nearer the 1.25MB/s theoretical ethernet rate.
-
- TCP UDP
- TX RX TX RX
- DE425 1030k 997k 1170k 1128k (EISA on a Dell 433DE)
- DE434 1063k 995k 1170k 1125k (PCI: DECpc XL 466d2)
- DE435 1063k 995k 1170k 1125k (PCI: DECpc XL 466d2)
- DE500 1063k 998k 1170k 1125k in 10Mb/s mode (PCI: DECpc XL 466d2)
-
- All values are typical (in kBytes/sec) from a sample of 4 for each
- measurement. Their error is approx +/-20k on a quiet (private) network and
- also depend on what load the CPU has, CPU speed etc.
-
- ZYNX and SMC cards, which use the PCI DECchip DC21040, are not specifically
- supported in this driver because
-
- a) I have no information on them.
- b) I cannot test them with the driver.
- c) Donald Becker's 'tulip.c' driver works with them....well one person says
- they do and another says they do not, so take your pick!
-
- This driver can be made to work with the ZYNX (and may be the SMC) card by
- setting a compile time flag (IS_NOT_DEC) in linux/drivers/net/CONFIG
-
- Enjoy!
-
- Dave
-