[realtek] rtl8139 in a 486?

Luca Olivetti luca@olivetti.cjb.net
Sat, 15 Jul 2000 00:41:23 +0200

Hash: SHA1

I have a noname board with a realtek 8139, and it doesn't work reliably in my 
old 486 (and by browsing the mail archive it seems I'm not the only one with 
this problem). The problem is that after the first megabyte (more or less) the 
reception of data is *very* slow. Donald Becker suggested in a message (3 
December 1999) that it is a problem with some buggy 486 chipsets, and a 
possible solution would be to set RX_DMA_BURST to 1. I tried that but it 
doesn't work :-(
Then I found in deja that it can't work, since the pci bus in a 486 is 
revision 1.0, while these adapter are pci 2.1.
What's the real problem, a buggy chipset or a different pci revision?
Is there a workaround, at least to get the thing going until I can get an ISA 
card (I don't need 100Mbps)?
I'm using the rtl8139.c version 1.10 in a 2.2.5 kernel (redhat 6.0).
The chipset is an UMC 8881/8886 (an 486AVIP motherboard, v3.4b/f).

Thank you.

- -- 
Luca Olivetti  http://olivetti.cjb.net   Linux registered user #55968
Tarifa plana ya. Seguimos mirando el reloj. Nuevas acciones en septiembre.

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Comment: Exmh version 2.1.0 04/14/1999