Re: Flash reader in a PCI-PCMCIA adapter not detected
Anthony Naggs <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
In article <[email protected]> , Vaclav Petricek <[email protected]> writes > >Hello > >I have a PCMCIA SanDisk SDCFB-32 flash reader/writer that works in a >PCMCIA slot in a notebook. When I insert it in a PCI adapter to use it in >my desktop I am not able to detect it. Okay. >A prism 2.5 WiFi card works great >in this PCI adapter. The OS version is 5.0-RELEASE. This is not a good test. All PCI adapters for WiFi cards have a warning like "only use with brand X WiFi card". Many WiFi card brands sell PCI adapters that will not work with other cards. Especially those who sell Prism based cards. :-( A good PCI to PC Card adapter will either have a PCMCIA (16-bit) bridge or (preferably) a Cardbus bridge (for 16 & 32-bit cards). This includes circuits to detect the card being hot plugged and to switch power off, 3.3V or 5V, map IRQs to the PC Card(s) etc... Many makers of Prism WiFi cards cheat, using a very cheap PCI to ISA bridge and (for example) no choice of 3.3V or 5V power. Total cost for the board about $5, but sold for the same price as a better PCI adapter. Check the chips on your PCI adapter. The PLX PCI9052 is used by all the bad adapters I have seen. A good adapter will probably have a Ricoh or TI chip. Tony _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"