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MODE 01h "QUERY STREAM" (valid only for those opcodes listed here)
        A0h return logical cursor row in next byte
        A1h return logical cursor column in next byte
        A2h return top row of scrolling region in next byte
        A3h return left column of scrolling region in next byte
        A4h return row of physical window origin in next byte
        A5h return column of physical window origin in next byte
        A6h return height of physcial window in next byte
        A7h return width of physical window in next byte
        A8h return row of viewport origin in next byte
        A9h return column of viewport origin in next byte
        AAh return height of virtual screen in next byte
        ABh return width of virtual screen in next byte
        AFh return current video mode in next byte
        C0h return current logical cursor position in next two bytes
        C1h return top left corner of scrolling region in next two bytes
        C2h return current window position in next two bytes
        C3h return current window size in next two bytes
        C4h return current viewport origin in next two bytes
        C5h return current virtual screen size in next two bytes
        D0h \ overwritten with D0h if frames may fall off screen edge
        D1h /                  D1h if frames always displayed entirely
        D2h \ overwritten with D2h if DESQview controls color palette
        D3h /                  D3h if application changes color palette
        D4h \ overwritten with D4h if window visible
        D5h /                  D5h if window hidden
        D6h \ overwritten with D6h if window has frame
        D7h /                  D7h if window unframed
        D8h \ overwritten with D8h if reading characters from window
        D9h /                  D9h if reading attributes from window
        DAh \ overwritten with DAh if using logical attributes
        DBh /                  DBh if using physical attributes
        DCh \ overwritten with DCh if TTY control char interpretation on
        DDh /                  DDh if TTY control char interpretation off
        DEh \ overwritten with DEh if writing both characters and attributes
        DFh /                  DFh if leaving attributes untouched
        E2h return current color in next byte
        ECh get logical attributes for window contents
            BYTE execute call if currently in specified video mode
                bit 7   monochrome
                bit 6   color text, EGA/VGA graphics
                bit 5   medium-resolution CGA graphics
                bit 4   high-resolution CGA graphics
            BYTE which attributes to get
                bit 7 unused???
                bits 4-6 first attribute to get - 1
                bits 0-3 # consecutive attributes
            N BYTEs buffer to hold attributes
        EDh get logical attributes for window frame
            BYTE execute call if currently in video mode (see opcode ECh)
            BYTE which attributes to get
                bit 7 unused???
                bits 4-6 first attribute to get - 1
                bits 0-3 # consecutive attributes
            N BYTEs buffer to hold attributes
        EEh get characters for window frame
            BYTE execute call if currently in video mode (see opcode ECh)
            BYTE which attributes to get
                bit 7 unused???
                bits 4-6 first char to get - 1
                bits 0-3 # consecutive chars
            N BYTEs buffer to hold chars
        EFh return first N characters of current window name
            BYTE    max length of returned name
            N BYTEs buffer to hold window name
        F3h return contents of specified field
            BYTE field number
            N BYTEs buffer to hold field contents (size exactly equal to field
                    size)
        F5h get field table entry
            BYTE field number
            7-8 BYTEs buffer to hold field table entry
               Notes: DV < 2.26 always returns 7 bytes
                      DV 2.26+ w/ APILEVEL < 2.26 returns 8 bytes iff field
                        table is using 8-byte entries and eighth byte after
                        F5h is E7h (NOP); otherwise, 7 bytes are returned
                      DV 2.26+ w/ APILEVEL > 2.26 returns 7 or 8 bytes
                        depending on the field table entry size
        F6h get type of a field
            BYTE field number
            BYTE type
        FCh get field table header
            6 BYTEs buffer to store header