[lwip-users] Re: [lwip] Offtopic Realtek

[Shaun Jackman]

If you have rolled your own hardware, I highly recommend attaching an 
oscilloscope to the data lines. Trigger on the real-tek write line, 
and check each of the data lines one by one. What you're experiencing 
really sounds like a hardware problem (shorted address/data lines). 
Or, possibly a software/hardware problem like misconfigured 
bus-timings (like others have suggested).

Cheers,
Shaun


On Wed November 13, 2002 02h06, Nicolas Moreau wrote:
> This is offtopic but somone here might have the answer.
>
> I am trying to write a driver for the Realtek chip, all is fine
> apart for one problem. Some bytes are changed when the are sent on
> Ethernet. I am logging information using Etherpeek on W2K.
> eg: sending 0x50 in a packet I get 0x52 on the PC.
>
> I can write any value into registers and that works, so my
> hardware/bus is fine. Some other bytes are substituted and the only
> pattern I have found is: if bit 4 and any bit 5,6 or 7 is set then
> bit 1 is set !!
>
> I can't make any sense out of this, it's driving me mad. I even
> changed chips and  I still have the same problem so I figure it
> must be software !
>
> Any ideas anyone ?
>
> Thanks
>
> Nic
>
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>
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