INT 63 - HP 100LX - MAP HIGH MEMORY AH = 00h AL = physical page (00h seg C000, 01h seg C400h, ...) BX = zero-based logical page CX = page number DX = device ID (00h system ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs., 05h plugin, etc.) Return: ??? SeeAlso: AH=01h