INT 67,42 - Get Page Counts (LIM EMS 3.2+)
AH = 42h on return: AH = 00 success = error code (see EMS STATUS) BX = number of unallocated or available pages DX = total number of pages in EMM system - registers not listed are preserved
AH = 42h on return: AH = 00 success = error code (see EMS STATUS) BX = number of unallocated or available pages DX = total number of pages in EMM system - registers not listed are preserved