Int 62 Fn 0066 u - Fgdriver V4.02 - "fg_kbinit" - Enable/disable Low-lev [V]

AX = 0066h
BX = new state (0000h disabled, 0001h enabled)

Notes: the FGDRIVER functions are rearranged with each major release, but
their parameters do not change (see #3145 at AX=0000h)
When the low-level handler is enabled, "FG_GETKEY", "FG_INTKEY",
"FG_WAITKEY", and all other functions calling DOS or BIOS keyboard
services become unavailable

See Also: AX=0067h,AX=0068h,AX=0069h