PORTIBM PC Portable (uses same BIOS as XT) 0461-0462 - EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). NMIsee Non-Maskable Interrupt CONTROL 0461 RW Extended NMIsee Non-Maskable Interrupt status/control register (see #P0890) 0462 -W Software NMIsee Non-Maskable Interrupt register. writing to this register causes an NMIsee Non-Maskable Interrupt if NMIs are enabled bit 7 = 1 generates an NMIsee Non-Maskable Interrupt Bitfields for EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). extended NMIsee Non-Maskable Interrupt status control register: Bit(s) Description (Table P0890) 7 R- NMIsee Non-Maskable Interrupt pending from fail-safe (watchdog) timer 6 R- NMIsee Non-Maskable Interrupt pending from bus timeout NMIsee Non-Maskable Interrupt status 5 R- NMIsee Non-Maskable Interrupt pending from I/O port status 4 R- busmaster preemption timeout if bit 6 set 3 RW bus timeout NMIsee Non-Maskable Interrupt enable 2 RW fail-safe (watchdog) NMIsee Non-Maskable Interrupt enable 1 RW NMIsee Non-Maskable Interrupt I/O port enable 0 RW RSTDRV. bus reset =0 NORMAL bus reset operation =1 reset bus asserted