Hi!<br><br>lance.c emulation implements incorrect algorithm to scan receive/transmit descriptors:<br>&nbsp;- it scans a whole ring of descriptors instead of stopping at first owned by host<br>&nbsp;- it skips buffers in corner cases
<br>&nbsp;- card is not reset, current rx/tx descriptor number is not reset when card is stopped by driver<br><br>Attached patch should fix these problems.<br>On-demand packet transmission is also implemented.<br><br>Without this patch I had ~500 byte/second transfers with qemu-system-sparc,
<br>now it network speed is much better :)<br><br>Looking at 7990 chip docs (main chip on lance card) it seems like there are more features<br>not implemented; e.g. 1.6ms timer is needed to implement &quot;normal&quot; transmission.
<br><br>