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Tested works
VINTAGE 1994 3COM ETHERLINK III 3C509-C ISA ETHERNET RJ45 / COAX/ THICK LAN2
$34.95
3Com EtherLink II High Performance 8-bit Adapter 3C503 BRAND NEW IN BOX Ethernet
$300.00
3Com 3C905B-TXNM Fast Etherlink XLPCI 10/100 Base-TX Adapt Network LAN Card READ
$14.00
Documentation