Only 10Mbs transfer rate with 100Mbs Macronix network adapter

[=?iso-8859-1?Q?Robert_M=FCcke?=]

Hello,

I set up a small network with a Linux and a Win NT based computer and
installed in each an 100Mbs network adapter (noname, sorry, seems to be
a Macronix, the accomplished Win NT driver is named PRO 120(B) Fast
Ethernet Adapter). On both computers the network adapters are configured
to 100baseTx full duplex (on Linux: tulip version 0.91g, options: 21).
The connections works fine, except that the transfer rate seem to be
only 10Mbs, at least the rate displayed by xosview and overall speed
indicate this (it is always less then 2MB/sec while transfering large
cached files as well as using an XServer). The diagnostic output is

tulip-diag
----------
tulip-diag.c:v1.15 9/23/99 Donald Becker (becker@cesdis.gsfc.nasa.gov)
Index #1: Found a Macronix 98715 PMAC adapter at 0xec00.
 Port selection is 10mpbs-serial 100baseTx scrambler, full-duplex.
 Transmit started, Receive started, full-duplex.
  The Rx process state is 'Waiting for packets'.
  The Tx process state is 'Idle'.
  The transmit threshold is 72.
 No MII transceivers found!
 EEPROM size is 6.
 A simplifed EEPROM data table was found.
 The EEPROM does not contain transceiver control information.
 Macronix 98715 PMAC chip registers at 0xec00:
  fff88000 ffffffff ffffffff 00fff810 00fffa10 ec000107 01880200
e7fe0000
  fffe0000 0fffcf08 fffd75ff fffe0000 4101d0cc ffff0000 ffffffff
fff00000
  0f340000 0f340000 0f340000 fc0ffff0 4001527f 4001527f 4001527f
4001527f
  4001527f 4001527f 4001527f 4001527f 4001527f 4001527f 4001527f
4001527f

So I ask, does the "10mpbs-serial" mean, that the adapter is recognised
to be capable only of 10mps? Or is there anything that I can change in
my configuration? Or are the chip registers just not compatible with
normal tulip cards?

Is there anything importent to know from the
http://www.mxic.com.tw/publish/2276.htm page (link is given on the tulip
page under compatibility section for Macronix cards). This page is no
longer available.

Thanks for any idea,

Robert