Here is what PCI_CONFIG_DUMP had to say about the wi0 card

Martin

io space, memory space enabled
wi0 at pci0 dev 0 function 0: PCI configuration registers:
  Common header:
    0x00: 0x38731260 0x02900347 0x02800001 0x0000fc00

    Vendor Name: Intersil (0x1260)
    Device Name: PRISM2.5 Mini-PCI WLAN (0x3873)
    Command register: 0x0347
      I/O space accesses: on
      Memory space accesses: on
      Bus mastering: on
      Special cycles: off
      MWI transactions: off
      Palette snooping: off
      Parity error checking: on
      Address/data stepping: off
      System error (SERR): on
      Fast back-to-back transactions: on
    Status register: 0x0290
      Capability List support: on
      66 MHz capable: off
      User Definable Features (UDF) support: off
      Fast back-to-back capable: on
      Data parity error detected: off
      DEVSEL timing: medium (0x1)
      Slave signaled Target Abort: off
      Master received Target Abort: off
      Master received Master Abort: off
      Asserted System Error (SERR): off
      Parity error detected: off
    Class Name: network (0x02)
    Subclass Name: miscellaneous (0x80)
    Interface: 0x00
    Revision ID: 0x01
    BIST: 0x00
    Header Type: 0x00 (0x00)
    Latency Timer: 0xfc
    Cache Line Size: 0x00

  Type 0 ("normal" device) header:
    0x10: 0x20000008 0x00000000 0x00000000 0x00000000
    0x20: 0x00000000 0x00000000 0x00000000 0x38731260
    0x30: 0x00000000 0x000000dc 0x00000000 0x00000100

    Base address register at 0x10
      type: 32-bit prefetchable memory
      base: 0x20000000, size: 0x00001000
    Base address register at 0x14
      not implemented(?)
    Base address register at 0x18
      not implemented(?)
    Base address register at 0x1c
      not implemented(?)
    Base address register at 0x20
      not implemented(?)
    Base address register at 0x24
      not implemented(?)
    Cardbus CIS Pointer: 0x00000000
    Subsystem vendor ID: 0x1260
    Subsystem ID: 0x3873
    Expansion ROM Base Address: 0x00000000
    Capability list pointer: 0xdc
    Reserved @ 0x38: 0x00000000
    Maximum Latency: 0x00
    Minimum Grant: 0x00
    Interrupt pin: 0x01 (pin A)
    Interrupt line: 0x00

  Capability register at 0xdc
    type: 0x01 (Power Management, rev. 1.0)

  Device-dependent header:
    0x40: 0x00008080 0x00000000 0x00000000 0x00000000
    0x50: 0x00000000 0x00000000 0x00000000 0x00000000
    0x60: 0x00000000 0x00000000 0x00000000 0x00000000
    0x70: 0x00000000 0x00000000 0x00000000 0x00000000
    0x80: 0x00000000 0x00000000 0x00000000 0x00000000
    0x90: 0x00000000 0x00000000 0x00000000 0x00000000
    0xa0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xb0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xc0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xd0: 0x00000000 0x00000000 0x00000000 0x7e020001
    0xe0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xf0: 0x00000000 0x00000000 0x00000000 0x00000000

    Don't know how to pretty-print device-dependent header.

Intersil PRISM2.5 Mini-PCI WLAN (miscellaneous network, revision 0x01) at ? dev 0 function 0 (intrswiz 0, intrpin 0x1, i/o on, mem on, no quirks): can't map mem space