产品详细资料
为了保持与PC/XT系统的向后兼容性,IBM选择在从属PIC上使用新的IRQ9输入作为PC/XT扩展总线上的旧IRQ2中断线。因此,在AT系统中,IRQ9中断线连接到AT扩展总线(或ISA总线)上的旧IRQ2引脚。BIOS定义每个设备要使用的PC/AT中断线。BIOS向两个级联的8259A PIC芯片中的每一个写入一个8位矢量,该矢量将每个IRQx映射到存储器中相应的中断矢量。ISA设备中断映射VMIVME-7740 BIOS根据标准ISA架构将IRQx线映射到适当的设备。参考21页图E-2。无法更改此初始化操作;然而,自定义应用程序可以在BIOS完成初始配置周期后重新路由中断配置。PCI设备中断映射基于PCI总线的外部设备包括两个PCI扩展站点、PCI到VMEbus桥和VGA保留连接。默认BIOS将这些外部设备映射到PIIX4E的PCI中断请求(PIRQx)行。该映射如21页图E-2所示,并在表E-3中定义。无法修改每个设备上存在的设备PCI中断线(INTA到INTD)。
To maintain backward compatibility with PC/XT systems, IBM chose to use the new IRQ9 input on the slave PIC to operate as the old IRQ2 interrupt line on the PC/XT Expansion Bus. Thus, in AT systems, the IRQ9 interrupt line connects to the old IRQ2 pin on the AT Expansion Bus (or ISA bus). The BIOS defines the PC/AT interrupt line to be used by each device. The BIOS writes to each of the two cascaded 8259A PIC chips an 8-bit vector, which maps each IRQx to its corresponding interrupt vector in memory. ISA Device Interrupt Map The VMIVME-7740 BIOS maps the IRQx lines to the appropriate device per the standard ISA architecture. Reference Figure E-2 on page 121. This initialization operation cannot be changed; however, a custom application could reroute the interrupt configuration after the BIOS has completed the initial configuration cycle.PCI Device Interrupt Map The PCI bus-based external devices include the two PCI expansion sites, the PCI-to-VMEbus bridge, and the VGA reserved connection. The default BIOS maps these external devices to the PCI Interrupt Request (PIRQx) lines of the PIIX4E. This mapping is illustrated in Figure E-2 on page 121 and is defined in Table E-3. The device PCI interrupt lines (INTA through INTD) that are present on each device cannot be modified.
主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。
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●使用前:
在操作和维护,安装设备之前,请阅读并严格遵守安全相关的信息。
Read and strictly follow safety-related information before operatingmaintainingand installing equipment.
●使用者要求:
必须从事安装,组装或维护设备等相关工控电气机械以及其他相关技术的人员。
Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:
应用于品牌本系列工业以及生产生活自动化设备产品。
Used in the brand of this series of industriaand production automation eauipment products
适用于场景:系统集成,非标定制,产线升级改造,原设备电气替换等等。
Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.
●操作人员:
应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强,熟悉安全信息和安全实施:
熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。
Equipment should be installed,operated and maintained by trained operators from the brand
●危险情况
警告
.请注意使用人员的人身安全。
●除了产品特性以及功能,还需了解产品的使用寿命环境。
●充分学习产品使用手册,否则非专业人员可能会造成人身危险。
Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.
●服务行业
适用水泥,木业,石业,橡胶,石油,化工,发电,环保,水处理,制冷,交通,钢铁,食品,饮料,船舶,制冷等行业
Applicable to cementwood,stone,rubber,petroleumchemical, power generation