3C515-Tx Nic Operation Tips; Compaq 386/20E Pc; Compaq Deskpro 433/L Pc; Ibm 486 Slc And Ibm 386 Slc Pcs - 3Com Fast EtherLink 3C515-TX User Manual

3C515-TX NIC Operation Tips

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3C515-TX NIC Operation Tips
3Com testing has discovered bus mastering problems on
some PCs. Refer to the README.TXT file for information
on how to disable bus mastering.
The 3C515-TX NIC was designed for maximum
performance and compatibility in ISA-only machines. For
PCI/ISA hybrid or EISA PCs, use the 3Com 3C905-TX
Fast EtherLink XL PCI NIC or the 3Com 3C597-TX
Fast EtherLink EISA NIC.

Compaq 386/20e PC

3Com has observed during testing that the 3C515-TX
NIC is not detected by the Compaq 386/20e PC.

Compaq DeskPro 433/L PC

The Plug and Play (PnP) range check cannot detect an I/O
conflict with the on-board video set to the 0x3C0 I/O
base address. This NIC works with other I/O base
address settings.

IBM 486 SLC and IBM 386 SLC PCs

The 3C515-TX NIC does not run in bus master mode on
these PCs. To disable bus mastering on your PC, refer
to the README.TXT file.