WOODWARD 9907-167伺服調速器,9907-167使用進展
設備探針功能完成設備探測，并將條目輸入到設備描述符表中每當訪問指定設備時；i、 e.當系統調用時.DSKRD。DSKWR。DSKCFIG。DSKFMT和。DSKCTRL，以及調試器命令BH、BO、IOC、IOP、IOT、MAR和MAW使用。
設備探測機制利用SCSI命令“查詢”和“模式感知”。如果指定的控制器不是SCSI，則探測器只返回“設備存在且未知”的狀態。這個device probe使用相關數據。輸入后，下次探測完成后，它只返回“設備存在”狀態（指針到設備描述符）。
WOODWARD 9907-167伺服調速器通過187Bug命令進行磁盤輸入/輸出以下187Bug命令用于磁盤I/O。有關其使用的詳細說明，請參閱調試摩托羅拉88K RISC CPU用戶手冊包。當向特定控制器LUN和設備LUN發出命令，這些LUN由187Bug記住，以便下一個磁盤命令默認使用相同的控制器和設備。IOI（輸入/輸出查詢）此命令用于探測系統中所有可能的CLUN/DLUN組合并顯示設備的查詢數據支持它。設備描述符表只有16個空間
設備描述符；使用IOI命令，您可以查看表并在必要時清除。IOP（到磁盤的物理I/O）IOP允許您讀取或寫入數據塊，或格式化以某種方式指定設備。IOP創建命令包從指定的參數，然后調用
正確的系統調用功能來執行操作。物聯網（輸入/輸出教學）物聯網允許您更改任何可配置參數和設備的屬性。此外，它允許您查看系統中可用的控制器。IOC（輸入/輸出控制）IOC允許您發送由直接指定控制器。國際奧委會也可以用來研究使用IOP命令后生成的設備數據包。BO（引導操作系統）BO從中讀取操作系統或控制程序將指定的設備放入內存，然后將控制權轉移給它。
Device Probe Function
A device probe with entry into the device descriptor table is done
whenever a specified device is accessed; i.e., when system calls
.DSKRD, .DSKWR, .DSKCFIG, .DSKFMT, and .DSKCTRL, and
debugger commands BH, BO, IOC, IOP, IOT, MAR, and MAW
are used.
The device probe mechanism utilizes the SCSI commands "Inquiry"
and "Mode Sense". If the specified controller is non-SCSI, the probe
simply returns a status of "device present and unknown". The
device probe makes an entry into the device descriptor table with
the pertinent data. After an entry has been made, the next time a
probe is done it simply returns with "device present" status (pointer
to the device descriptor). Disk I/O via 187Bug Commands
These following 187Bug commands are provided for disk I/O.
Detailed instructions for their use are found in the Debugging
Package for Motorola 88K RISC CPUs User's Manual. When a
command is issued to a particular controller LUN and device LUN,
these LUNs are remembered by 187Bug so that the next disk
command defaults to use the same controller and device.
IOI (Input/Output Inquiry)
This command is used to probe the system for all possible
CLUN/DLUN combinations and display inquiry data for devices
which support it. The device descriptor table only has space for 16
device descriptors; with the IOI command, you can view the table
and clear it if necessary.
IOP (Physical I/O to Disk)
IOP allows you to read or write blocks of data, or to format the
specified device in a certain way. IOP creates a command packet
from the arguments you have specified, and then invokes the
proper system call function to carry out the operation.
IOT (I/O Teach)
IOT allows you to change any configurable parameters and
attributes of the device. In addition, it allows you to see the
controllers available in the system.
IOC (I/O Control)
IOC allows you to send command packets as defined by the
particular controller directly. IOC can also be used to look at the
resultant device packet after using the IOP command.
BO (Bootstrap Operating System)
BO reads an operating system or control program from the
specified device into memory, and then transfers control to it.
