I have the same problem with the same card, in 10baseT full-duplex:

tlp0 at pci0 dev 9 function 0: ADMtek AN985 Ethernet, pass 1.1
tlp0: interrupting at irq 12
tlp0: Ethernet address 00:04:5a:67:5e:a7
acphy0 at tlp0 phy 1: ACXXX 10/100 media interface, rev. 0
acphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto

And when ftping w/ media 10baseT mediaopt full-duplex:

Apr 17 05:34:16 lusitania /netbsd: tlp0: receive error: dribbling bit
Apr 17 05:34:16 lusitania /netbsd: tlp0: receive error: CRC error
Apr 17 05:34:16 lusitania /netbsd: tlp0: receive error: dribbling bit
Apr 17 05:34:16 lusitania /netbsd: tlp0: receive error: CRC error
Apr 17 05:34:25 lusitania last message repeated 6 times
Apr 17 05:34:26 lusitania /netbsd: tlp0: receive error: dribbling bit
Apr 17 05:34:26 lusitania /netbsd: tlp0: receive error: CRC error
Apr 17 05:34:28 lusitania /netbsd: tlp0: receive error: dribbling bit
Apr 17 05:34:28 lusitania /netbsd: tlp0: receive error: CRC error

On Wed, Apr 17, 2002 at 05:35:05PM +0900, Masanori Kanaoka wrote:
> Hi,
> 
>        From: "Charles M. Hannum" <root@ihack.net>
>     Subject: READ ME: please test some Tulip Ethernet boards
>       Date : Tue, 16 Apr 2002 03:29:23 +0000
>  Message-ID: <20020416032923.22209.qmail@mail.netbsd.org>
> 
> $ If possible and where relevant, please test both 10Mb and 100Mb, half
> $ and full duplex modes.
> 
> $ Corega CB-TXL
> 
> I have this one as below:
> 
>  tlp1 at cardbus0 dev 0 function 0: ADMtek AN985 Ethernet, pass 1.1
>  tlp1: Ethernet address 00:90:99:20:57:4d
>  acphy0 at tlp1 phy 1: ACXXX 10/100 media interface, rev. 0
>  acphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> 
> I tested lastest tlp driver.
> I set media 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto, 
> and get/put mozilla-source-0.9.9.tar.bz2 via ftp sevral times.
> 
>   10baseT			fine
>   10baseT full-duplex		bad
>   100baseTX			fine
>   100baseTX full-duplex		fine
>   auto(100baseTX full-duplex)	fine
> 
> When 10baseT full-duplex, dmesg outputs a lot of messages
> as below:
> 
> tlp1: receive error: CRC error
> tlp1: receive error: CRC error
> tlp1: receive error: dribbling bit
> tlp1: receive error: CRC error
> tlp1: receive error: dribbling bit
> tlp1: receive error: CRC error
> 
> Regards
> ---
>  Masanori Kanaoka	kanaoka@ann.hi-ho.ne.jp
> 

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