INT 62 u - FGDRIVER v4.02 - "FG_GETMAP" - STORE IMAGE AS MODE-INDEPENDNT BITMAP
	AX = 0048h
	ES:BX -> buffer for video mode-independent bitmap
	CX = width of bitmap in bytes
	DX = height of bitmap in pixel rows
Return: each bit in bitmap is set if corresponding pixel is of the current
	  color, cleared otherwise
Notes:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
	This call is ignored in text modes
SeeAlso: AX=0011h,AX=001Eh,AX=0024h