INT 1A - PCMCIA Socket Services - GET SOCKET
        AH = 8Dh
        AL = adapter number
        BL = socket number (01h to maximum supported by adapter)
Return: CF clear if successful
            AH destroyed
            BH = status change interrupt enable mask (see AH=81h"PCMCIA")
            CH = Vcc level (lower nybble)
            CL = Vpp1 level (upper nybble) and Vpp2 level (lower nybble)
            DH = current socket status (see AH=81h"PCMCIA")
            DL = indicators (see AH=8Ch)
            SI = card type (see below)
            DI = IRQ level steering (I/O only) (see below)
        CF set on error
            AH = error code (01h,0Bh) (see AH=80h"PCMCIA")
SeeAlso: AH=8Ch,AH=8Eh

Bitfields for card type:
 bit 0  memory
 bit 1  I/O
 bits 2-15 reserved (0)

Bitfields for I/O level steering:
 bits 0-4       IRQ level (0-15=IRQ,16=NMI,17=I/O check,18=bus error,19=vendor)
 bits 5-14      reserved (0)
 bit 15         interrupt steering enabled

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