CSA464AE模塊，ABB使用尺寸
PCI仲裁MVME2603/2604單總線上有七個(gè)潛在的PCI總線主機(jī)板機(jī)：
? Raven ASIC（MPU/PCI總線橋控制器）
? Winbond W83C553 PIB（PCI/ISA總線橋控制器）
? DEC芯片21140以太網(wǎng)控制器
? SYM53C825A SCSI控制器
? Universe ASIC（PCI/VME總線橋控制器）
? PMC插槽1（PCI夾層卡）
CSA464AE模塊? PMC插槽2（PCI擴(kuò)展）Winbond W83C553 PIB設(shè)備提供PCI仲裁支持對(duì)于這七種類型的設(shè)備。PIB支持靈活的仲裁固定優(yōu)先級(jí)、旋轉(zhuǎn)優(yōu)先級(jí)和混合優(yōu)先級(jí)模式，如適用于給定應(yīng)用。可以找到PCI仲裁的詳細(xì)信息在MVME2600系列單板計(jì)算機(jī)程序員的參考指南，見(jiàn)附錄D，相關(guān)文件。MVME2603/2604的仲裁分配如下表。中斷處理Raven ASIC，控制PHB（PCI主機(jī)橋）MPU/本地總線MVME2603/2604上的接口功能，執(zhí)行中斷處理也中斷源可以是以下任何一種：
? Raven ASIC本身（計(jì)時(shí)器中斷或傳輸錯(cuò)誤中斷）
? 處理器（處理器自中斷）
? Falcon芯片組（內(nèi)存錯(cuò)誤中斷）
? PCI總線（來(lái)自PCI設(shè)備的中斷）
? ISA總線（從ISA設(shè)備中斷）圖2-3說(shuō)明了MVME2603/2604上的中斷架構(gòu)。對(duì)于有關(guān)中斷處理的詳細(xì)信息，請(qǐng)參閱MVME2600系列單板附錄D中列出的《計(jì)算機(jī)程序員參考指南》，相關(guān)
文檔PIB支持七個(gè)DMA通道。通道0到3支持8位DMA設(shè)備。通道5到7專用于16位DMA設(shè)備。信道分配如下：復(fù)位源MVME2603/2604 SBC有八個(gè)潛在的復(fù)位源：
1、上電復(fù)位
2、復(fù)位開(kāi)關(guān)（當(dāng)MVME2603/2604為系統(tǒng)控制器）
3.SGS Thomson控制的看門(mén)狗定時(shí)器重置功能
MK48T559計(jì)時(shí)器設(shè)備（當(dāng)MVME2603/2604為系統(tǒng)控制器）
PCI Arbitration
There are seven potential PCI bus masters on the MVME2603/2604 single
board computer:
? Raven ASIC (MPU/PCI bus bridge controller)
? Winbond W83C553 PIB (PCI/ISA bus bridge controller)
? DECchip 21140 Ethernet controller
? SYM53C825A SCSI controller
? Universe ASIC (PCI/VME bus bridge controller)
? PMC Slot 1 (PCI mezzanine card)
? PMC Slot 2 (PCI expansion)
The Winbond W83C553 PIB device supplies the PCI arbitration support
for these seven types of devices. The PIB supports flexible arbitration
modes of fixed priority, rotating priority, and mixed priority, as
appropriate in a given application. Details on PCI arbitration can be found
in the MVME2600 Series Single Board Computer Programmer’s
Reference Guide, listed in Appendix D, Related Documentation.
The arbitration assignments for the MVME2603/2604 are shown in the
following table.Interrupt Handling
The Raven ASIC, which controls PHB (PCI Host Bridge) MPU/local bus
interface functions on the MVME2603/2604, performs interrupt handling
as well. Sources of interrupts may be any of the following:
? The Raven ASIC itself (timer interrupts or transfer error interrupts)
? The processor (processor self-interrupts)
? The Falcon chip set (memory error interrupts)
? The PCI bus (interrupts from PCI devices)
? The ISA bus (interrupts from ISA devices)
Figure 2-3 illustrates interrupt architecture on the MVME2603/2604. For
details on interrupt handling, refer to the MVME2600 Series Single Board
Computer Programmer’s Reference Guide, listed in Appendix D, Related
Documentation.The PIB supports seven DMA channels. Channels 0 through 3 support
8-bit DMA devices. Channels 5 through 7 are dedicated to 16-bit DMA
devices. The channels are allocated as follows:Sources of Reset
The MVME2603/2604 SBC has eight potential sources of reset:
1. Power-on reset
2. RESET switch (resets the VMEbus when the MVME2603/2604 is
system controller)
3. Watchdog timer Reset function controlled by the SGS-Thomson
MK48T559 timekeeper device (resets the VMEbus when the
MVME2603/2604 is system controller)
