INT 1A - PCMCIA Socket Services - REGISTER CARD TECHNOLOGY CALLBACK
        AH = 82h
        DS:DX -> callback routine (see below) or 0000h:0000h
Return: CF clear if successful
            AH destroyed
        CF set on error
            AH = error code (see AH=80h"PCMCIA")
Note:   the callback is invoked on a Write Multiple request with an unsupported
          card technology type
SeeAlso: AH=81h"PCMCIA",AH=94h

Callback routine invoked with:
        ES:AX -> Low-Level Socket Services Routines (see below)
        BH = socket attributes (see below)
        CX = number of bytes or words to write
        DS:SI -> data buffer to be written
        DX:DI -> 26-bit linear card address
        BP = card technology type
Return: CF clear if successful
        CF set on error
            AH = error code (07h,0Ch,12h,14h) (see AH=80h"PCMCIA")

Bitfields for socket attributes:
 bit 0  memory type (clear = common, set = attribute)
 bit 1  data width (clear = byte, set = word)
 bit 2  even bytes only (only valid if bit 1 set)
 bit 3  packed buffer
 bits 4-7 reserved (0)

Format of Low-Level Socket Services Routines:
Offset  Size    Description
 00h    WORD    offset of Write Many routine (see below)
 02h    WORD    offset of Write One routine (see below)
 04h    WORD    offset of Read One routine (see below)
 06h    WORD    offset of Increment Offset routine (see below)
 08h    WORD    offset of Set Offset routine (see below)
 0Ah    WORD    offset of Get Status routine (see below)

Call Write Many routine with:
        BH = socket attributes (see above)
        CX = number of bytes or words to write
        DS:SI -> data to be written
Return: CF clear if successful
        CF set on error

Call Write One routine with:
        AL/AX = data to be written
        BH = socket attributes (see above)
Return: CF clear if successful
        CF set on error

Call Read One routine with:
        BH = socket attributes (see above)
Return: CF clear if successful
            AL/AX = data read
        CF set on error

Call Increment Offset routine with:
        BH = socket attributes (see above)
Return: CF clear if successful
        CF set on error

Call Set Offset routine with:
        DX:DI = new offset address
Return: CF clear if successful
        CF set on error

Call Get Status routine with:
        nothing
Return: AL = current card status (see AH=81h"PCMCIA")

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