Problems with 3Com card...

john152 at libero.it john152 at libero.it
Fri Jul 25 13:17:20 EDT 2003


Hi all,
i'd like to use a 3Com905-TX instead of Realtek RTL-8139 i used before,
but i have problems with mii-diag software in detecting the link status.

With Realtek card  all was Ok, infact i had:
at start (cable connected):
18:54:36.592  Baseline value of MII BMSR 
(basic mode status register) is 782d.

disconnecting the link:
18:55:01.632  MII BMSR now 7809:   no link, NWay busy, 
No Jabber (0000).
18:55:01.637  Baseline value of MII BMSR 
basic mode status register) is 7809.

connecting the link:
18:55:06.722  MII BMSR now 782d: Good link, 
NWay done, No Jabber (45e1).
18:55:06.728  Baseline value of MII BMSR 
(basic mode status register) is 782d.
.
.

Now i have the following output lines with 3Com:

at start (cable connected):
18:42:46.073  Baseline value of MII BMSR 
(basic mode status register) is 782d.

disconnecting the link:
18:42:50.779  MII BMSR now 7829:   no link, 
NWay done, No Jabber (0000).
18:49:38.524  Baseline value of MII BMSR 
(basic mode status register) is 7809.

connecting the link:
18:52:15.887  MII BMSR now 7829:   no link,
 NWay done, No Jabber (41e1).
18:52:15.895  Baseline value of MII BMSR 
(basic mode status register) is 782d.
.
.

With 3Com, the Baseline value of MII BMSR is 782d with Link Good
and 7809 with no Link (and it seems like the Realtek).
When the function 'monitor_mii' starts, in the baseline_1 variable
i see a correct value, instead in the following loop
while (continue_monitor)..., there is new_1 variable
that is always wrong: 7829. (Correctly the loop ends, but i have
the output "no link" wrong!)

new_1 is the return value of mdio_read(ioaddr, phy_id, 1) and should
be the same values of baseline_1 (782d or 7809), shouldn' t it?

Can you help me?
Thanks in advance for your kind answers.

Giovanni di Giacomo


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