INT 62 u - FGDRIVER v4.02 - "FG_PAGESIZE" - GET VIDEO PAGE SIZE FOR CURR MODE
	AX = 0084h
Return: DX:AX = page size in bytes
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0072h