PORTIBM PC Portable (uses same BIOS as XT) 00A0 - XTIBM PC XT - NMIsee Non-Maskable Interrupt MASK REGISTER
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0070h,INT 02

00A0  RW  NMIsee Non-Maskable Interrupt mask register (XTIBM PC XT only)
	 bit 7 = 0 NMIsee Non-Maskable Interrupt signal disabled from reaching CPU(Central Processing Unit) The microprocessor which executes programs on your computer.
	       = 1 NMIsee Non-Maskable Interrupt signal enabled