INT 1A - PCMCIA Socket Services - INQUIRE SOCKET
        AH = 8Ch
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
            DH = capabilities (see below)
            DL = hardware indicators (see below)
            DS:SI -> Socket Characteristics table (see below)
            DS:DI -> Power Management table (see below)
        CF set on error
            AH = error code (01h,0Bh) (see AH=80h"PCMCIA")
SeeAlso: AH=87h,AH=8Dh,AH=8Eh

Bitfields for socket capabilities:
 bit 0  card change
 bit 1  card lock
 bit 2  insert card (motor control)
 bit 3  eject card (motor control)
 bits 4-7 reserved (0)

Bitfields for socket hardware indicators:
 bit 0  busy status
 bit 1  write-protected
 bit 2  battery status
 bit 3  card lock status
 bit 4  XIP status (eXecute-In-Place)
 bits 5-7 reserved (0)

Format of Socket Characteristics table:
Offset  Size    Description
 00h    WORD    supported card types
                bit 0: memory card
                bit 1: I/O card
                bits 2-7 reserved (0)
 02h    WORD    steerable IRQ levels (bit 0 = IRQ0 to bit 15 = IRQ15)
 04h    WORD    additional steerable IRQ levels
                bit 0: NMI
                bit 1: I/O check
                bit 2: bus error
                bit 3: vendor-unique
                bits 4-7 reserved (0)

Format of Power Management table:
Offset  Size    Description
 00h    WORD    number of entries in table (0 if power management not avail)
 02h 2N BYTEs   power levels
                byte 0: voltage in 0.1V units
                byte 1: power supply
                        bit 7: Vcc
                        bit 6: Vpp1
                        bit 5: Vpp2

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