INT 10 - VIDEO - LOCATE 3270PC CONFIGURATION TABLE (INSTALLATION CHECK)
        AX = 3000h
        CX = 0000h
        DX = 0000h
Return: CX:DX -> 3270PC configuration table (see below)
        CX:DX = 0000h:0000h if 3270PC Control Program not active
SeeAlso: AX=1F01h

Format of 3270 PC configuration table:
Offset  Size    Description
 00h    BYTE    aspect ratio X
 01h    BYTE    aspect ratio Y
 02h    BYTE    monitor type (see below)
 03h    BYTE    reserved
 04h    BYTE    adapter ID
                00h = 5151/5272 adapter
                04h = 5151/5272 with XGA adapter
                30h = 3295 or 3270PC G/GX adapter
 05h    BYTE    reserved
 06h    BYTE    function flags 1 (see below)
 07h    BYTE    function flags 2
                bit 6: GPI graphics supported
 08h    WORD    segment address of Control Program Level table (see below)
 0Ah 10 BYTEs   reserved

Values for monitor type:
 00h    5151 (mono) or 5272 (color)
 01h    3295
 02h    5151 or 5272 with XGA (???) graphics adapter
 03h    5279 with 3270PC G adapter
 04h    5379 model C01 with 3270PC GX adapter
 05h    5379 model M01 with 3270PC GX adapter
 07h    non-3270PC with 3270 Workstation Program
 FFh    3270PC Control Program not loaded

Bitfields for function flags 1:
 bit 7  mono text, 1 page
 bit 6  color text, 1 page
 bit 5  color text, 4 pages
 bit 4  CGA color graphics
 bit 3  720x350 two-color graphics
 bit 2  360x350 four-color graphics
 bit 1  720x350 eight-color graphics

Format of Control Program Level table:
Offset  Size    Description
 00h    WORD    program version
                02xxh = 3270PC Control Program v2.xx
                03xxh = 3270PC Control Program v3.xx
                04xxh = 3270 Workstation Program v1.xx
 02h    BYTE    Control Program ID (00h)
 03h 27 BYTEs   Control Program Descriptor ("IBM 3270 PC CONTROL PROGRAM")

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