DULG

When PC Card support is enabled in your U-Boot configuration the target will try to detect any PC Cards in the slot when booting. If no card is present you will see a message like this:

PPCBoot 1.1.1 (Nov 11 2001 - 18:06:06)

CPU:   XPC862PZPnn0 at 48 MHz: 16 kB I-Cache 8 kB D-Cache FEC present
Board: ICU862 Board
DRAM:  32 MB
FLASH: 16 MB
In:    serial
Out:   serial
Err:   serial
PCMCIA:   No Card found

Depending on the type of PC Card inserted the boot messages vary; for instance with a Flash Disk card you would see:

...
PCMCIA: 3.3V card found: SunDisk SDP 5/3 0.6
            Fixed Disk Card
            IDE interface 
            [silicon] [unique] [single] [sleep] [standby] [idle] [low power]
Bus 0: OK 
  Device 0: Model: SanDisk SDP3B-8 Firm: Vdd 1.02 Ser#: fq9bu499900
            Type: Removable Hard Disk
            Capacity: 7.7 MB = 0.0 GB (15680 x 512)
...

With a CompactFlash Card you get:

...
PCMCIA: 3.3V card found:   CF 128MB CH
            Fixed Disk Card
            IDE interface 
            [silicon] [unique] [single] [sleep] [standby] [idle] [low power]
Bus 0: OK 
  Device 0: Model: CF 128MB Firm: Rev 1.01 Ser#: 1969C32AA0210002
            Type: Removable Hard Disk
            Capacity: 122.3 MB = 0.1 GB (250368 x 512)
...

Even more exotic memory devices (like the "MemoryStick as used in some Digital Cameras") will usually work without problems:

...
PCMCIA: 3.3V card found: SONY MEMORYSTICK(128M) 1.0
            Fixed Disk Card
            IDE interface 
            [silicon] [unique] [single] [sleep] [standby] [idle] [low power]
Bus 0: .OK 
  Device 0: Model: MEMORYSTICK 128M 16K                    Firm: SONY1.00` Ser#: 
            Type: Removable Hard Disk
            Capacity: 123.8 MB = 0.1 GB (253696 x 512)
...

And with a harddisk adapter you would see:

...
PCMCIA: 5.0V card found: ARGOSY PnPIDE D5
Bus 0: OK 
  Device 0: Model: IBM-DKLA-24320 Firm: KL4AA43A Ser#: YD2YD246800
            Type: Hard Disk
            Capacity: 4126.10 MB = 4.0 GB (8452080 x 512)
...

Note that most other cards will be detected by U-Boot, but not supported otherwise, for instance:

...
PCMCIA: 5.0V card found: ELSA AirLancer MC-11 Version 01.01
            Network Adapter Card
...

or

...
PCMCIA: 5.0V card found: Elsa MicroLink 56k MC Internet 021 A
            Serial Port Card
...