Date: Sun, 11 Jul 1999 23:08:04 -0600 From: Warner Losh <imp@village.org> To: Wes Peters <wes@softweyr.com> Cc: Mark Murray <mark@grondar.za>, Bill Paul <wpaul@skynet.ctr.columbia.edu>, hackers@FreeBSD.ORG Subject: Re: PCCARD and Vpp voltage Message-ID: <199907120508.XAA40748@harmony.village.org> In-Reply-To: Your message of "Sun, 11 Jul 1999 23:00:05 MDT." <37897655.133AC329@softweyr.com> References: <37897655.133AC329@softweyr.com> <378955BA.B1F94075@softweyr.com> <199907111119.NAA16211@gratis.grondar.za> <199907112234.QAA36877@harmony.village.org> <199907120251.UAA39731@harmony.village.org>
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In message <37897655.133AC329@softweyr.com> Wes Peters writes: : >From this, I'd say the card inserted event should read the Vcc wanted : value (from the Socket Present State Register?) and apply THAT voltage : to Vcc, Vpp1, and Vpp2, rather than just applying 5.0 volts. You might : seriously damage any 3.3v card inserted by applying 5v to it. Agreed on GPs. I don't think any laptops today have the low voltage slot, but instead have the unified slot. I believe that I saw in there that cards needed to be able to handle 5V as well, but in the world of PC Cards it is much better to be safe than sorry.... For the moment, the 0 -> 50 change is good, but longer term we may need to do the 3.3V stuff correctly. BTW, does anybody know where I can get a type II CF slot to Type II PC Card card adapter? This is so I can plug a pc card into a CF slot (I have one that does the other way round, but want to compare the price of the adapter with the price of a ne2000 CF ethernet card I'm looking at ($130)). : This is a pretty good book, by the way. ISBN 0-201-40997-6. Agreed. That's where I got my ideas about PCCARD as well, since the promised standard hasn't appeared on my doorstep yet. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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