Date: Sat, 19 Aug 2000 10:25:10 +0930 From: Greg Lehey <grog@lemis.com> To: Linh Pham <lplist@closedsrc.org> Cc: Lorin Lund <lorin_lund@yahoo.com>, freebsd-questions <freebsd-questions@FreeBSD.ORG> Subject: Re: PCMCIA - Cardbus - what is the difference and what is supported? Message-ID: <20000819102509.J15590@wantadilla.lemis.com> In-Reply-To: <Pine.BSF.4.21.0008171942190.92432-100000@q.closedsrc.org>; from lplist@closedsrc.org on Thu, Aug 17, 2000 at 07:44:01PM -0700 References: <000401c0087e$b3b8ad20$0900fea9@lorins.ild.telecom.com> <Pine.BSF.4.21.0008171942190.92432-100000@q.closedsrc.org>
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On Thursday, 17 August 2000 at 19:44:01 -0700, Linh Pham wrote:
> On Thu, 17 Aug 2000, Lorin Lund mumbled:
>
>> I have a notebook computer (Compaq Presario 1200 XL 118) that claims to
>> support CardBus so I bought a CardBus LinkSys 10/100 ethernet card. The
>> list of cards that are supported lists LinkSys 10/100. The card worked with
>> win98 before I wiped it out to load FreeBSD 4.0. FreeBSD doesn't recognize
>> the card. But then I get the same message with the Xircom Modem which
>> doesn't claim to be CardBus. I suspect I might have some of the
>> specifications on my pcmcia controller wrong.
>
> The original PC Card (or PCMCIA) bus is 16-bits wide and uses 5V
> whereas CardBus is 32-bits wide and runs on 3.3V.
PCMCIA cards can use either 3.3 V or 5 V. pccardc dumpcis will tell
you which. For example, for my modem I get:
Tuple #6, code = 0x1b (Configuration entry), length = 19
000: e0 81 9d 5f 55 4d 5d 26 36 35 fc 14 aa 60 f8 03
010: 07 24 28
Config index = 0x20(default)
Interface byte = 0x81 (I/O) wait signal supported
Vcc pwr:
Nominal operating supply voltage: 5 x 1V
Minimum operating supply voltage: 4.5 x 1V
Maximum operating supply voltage: 5.5 x 1V
Continuous supply current: 2 x 100mA
Max current average over 1 second: 3 x 100mA
Power down supply current: 3 x 10mA
Wait scale Speed = 1.2 x 10 us
Card decodes 10 address lines, 8 Bit I/O only
I/O address # 1: block start = 0x3f8 block length = 0x8
IRQ modes: Level
IRQ level = 4
Max twin cards = 0
Misc attr: (Audio-BVD2) (Power down supported)
> CardBus cards are generally faster, uses less CPU cycles, draws less
> power, and sometimes can cost more.
More importantly, we don't support them yet.
In general, you should be *very* careful in purchasing PCMCIA cards.
There are a large number out there which we don't support. Lorin,
you're going to have to wait a while before you can use that card
under FreeBSD. If you're interested, join FreeBSD-mobile and note
what's going on there.
Greg
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