Accton network chipset -> bad tulip clone?

Hi.
Has anyone seen this happen?
I'm getting TX packets as errors, looks like some swapped register in the chip maybe?
And yes, they are actually TXed correct, and i've also tried swapping the NIC with another one from the same brand/model, and also into another machine with the same results. The chip is physically branded as an "ADMtek AN983B", the board is an "Xnet 3000ACM".
PCI manufacturer ID looks quite phony, this is no Linksys board.
Kernel is 2.4.20.
Any ideas?

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# ifconfig eth1
eth1      Link encap:Ethernet  HWaddr 00:05:1C:0D:D9:E5
          inet addr:192.168.1.254  Bcast:192.168.1.255 Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2989342 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:3448876 dropped:0 overruns:0 carrier:6778358
          collisions:0 txqueuelen:100
          RX bytes:839123376 (800.2 Mb)  TX bytes:0 (0.0 b)
          Interrupt:9 Base address:0x1800

# lspci -v -s 00:0f.0
00:0f.0 Ethernet controller: Linksys Network Everywhere Fast Ethernet 10/100 model NC100 (rev 11)
        Subsystem: Accton Technology Corporation: Unknown device 1216
        Flags: bus master, medium devsel, latency 32, IRQ 9
        I/O ports at f000 [size=256]
        Memory at ffaef800 (32-bit, non-prefetchable) [size=1K]
        Expansion ROM at ffac0000 [disabled] [size=128K]
        Capabilities: [c0] Power Management version 2

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