ABB 5SHY35L4510 3BHE014105R0001可控硅输出模块
定时器中断状态三个定时器都使用一个中断IRQ5。提供定时器中断状态寄存器，以确定哪个定时器启动了中断。中断状态寄存器是一个通用输入寄存器，位于82C54外部，距离电源管理基础I/O地址偏移31h。可以通过首先确定设备ID 7113h和供应商ID 8086h的PCI配置基地址来找到中断状态寄存器地址。通过读取此PCI配置地址的偏移量40h，可以找到电源管理基础I/O地址。计时器中断状态寄存器位位于距离电源管理基本I/O地址位5、6和7的偏移31h处（参见图4-2）。步骤1：读取设备ID 7113h供应商ID 8086h电源管理基本输入/输出地址步骤2：读取南桥PCI配置基本地址Ofset 40h计时器中断状态暂存器步骤3：读取电源管理基本输出/输出地址字节偏移31h
Timer Interrupt Status A single interrupt, IRQ5, is used by all three Timers. A Timer Interrupt Status register is provided in order to determine which Timer(s) initiated an interrupt. The interrupt status register is a general-purpose input register located, external to the 82C54, at offset 31h from the Power Management Base I/O address. The interrupt status register address can be found by first determining the PCI Configuration Base address for Device ID 7113h and Vendor ID 8086h. The Power Management Base I/O address can be found by reading offset 40h from this PCI Configuration address. The Timer Interrupt Status register bits are located at offset 31h from the Power Management Base I/O address, Bits 5, 6, and 7 (refer to Figure 4-2).Step 1: Read Device ID 7113h Vendor ID 8086h Power Management Base I/O Address Step 2: Read South Bridge PCI Configuration Base Address Ofset 40h Timer Interrupt Status Register Step 3: Read Power Management Base I/O Address Byte Offset 31h
