INT 62 u - FGDRIVER v4.02 - "FG_YCONVERT" - CONVERT CHARACTER ROW TO SCREEN ROW
	AX = 00E5h
	BX = character space row
Return: AX = screen space row of topmost pixel in specified character row
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00E2h,AX=00E4h,AX=00E6h