IS230TVBAH2A燃机备件,GE使用配置教程
磁盘输入/输出错误代码如果尝试的磁盘操作不成功，197Bug将返回错误代码。
网络输入/输出支持网络引导固件提供通过以下方式引导CPU的能力：使用网络（本地以太网接口）作为引导的ROM调试器装置引导过程分两个不同的阶段执行。
❏ 第一阶段允许无盘远程节点发现其网络标识和要引导的文件的名称。
❏ 第二阶段是无盘远程节点跨网络进入其内存。各种模块（功能）和这些模块的依赖关系以下介绍了支持整体网络引导功能的段落。
IS230TVBAH2A燃机备件物理层管理器以太网驱动程序该驱动程序管理/包围以太网控制器芯片或板。管理的范围是接收数据包，传输数据包数据包、接收缓冲区刷新和接口初始化。该模块确保以太网数据包的打包和解包在启动PROM中正确完成。UDP/IP协议模块互联网协议（IP）设计用于分组交换计算机通信网络。互联网协议用于传输称为数据报的数据块（因此用户数据报协议（UDP），从源到目标，其中源和目的地是由固定长度地址标识的主机。UDP/IP协议是TFTP和BOOTP协议、TFTP所必需的BOOTP需要UDP/IP连接。RARP/ARP协议模块反向地址解析协议（RARP）基本上由一个无身份节点在以太网上广播“whoami”数据包，以及等待答案。RARP服务器向以太网回复数据包填充目标的Internet地址并将其发送。
地址解析协议（ARP）基本上提供了一种将协议地址（例如IP地址）转换为局域网地址（例如以太网地址）。RARP协议模块支持不支持BOOTP协议的系统（下一段）。BOOTP协议模块引导协议（BOOTP）基本上允许无盘客户机发现其自己的IP地址、服务器主机的地址和文件名被载入内存并执行。TFTP协议模块普通文件传输协议（TFTP）是一种传输文件的简单协议。
它是在互联网用户数据报协议（UDP或数据报），因此它可以用于在不同计算机上的计算机之间移动文件实现UDP的网络。它唯一能做的就是读写文件从/到远程服务器。
Disk I/O Error Codes
197Bug returns an error code if an attempted disk operation is unsuccessful.
Network I/O Support
The Network Boot Firmware provides the capability to boot the CPU through
the ROM debugger using a network (local Ethernet interface) as the boot
device.
The booting process is executed in two distinct phases.
❏ The first phase allows the diskless remote node to discover its network
identity and the name of the file to be booted.
❏ The second phase has the diskless remote node reading the boot file across
the network into its memory.
The various modules (capabilities) and the dependencies of these modules
that support the overall network boot function are described in the following
paragraphs.Physical Layer Manager Ethernet Driver
This driver manages/surrounds the Ethernet controller chip or board.
Management is in the scope of the reception of packets, the transmission of
packets, receive buffer flushing, and interface initialization.
This module ensures that the packaging and unpackaging of Ethernet packets
is done correctly in the Boot PROM.
UDP/IP Protocol Modules
The Internet Protocol (IP) is designed for use in interconnected systems of
packet-switched computer communication networks. The Internet protocol
provides for transmitting of blocks of data called datagrams (hence User
Datagram Protocol, or UDP) from sources to destinations, where sources and
destinations are hosts identified by fixed length addresses.
The UDP/IP protocols are necessary for the TFTP and BOOTP protocols, TFTP
and BOOTP require a UDP/IP connection.
RARP/ARP Protocol Modules
The Reverse Address Resolution Protocol (RARP) basically consists of an
identity-less node broadcasting a “whoami” packet onto the Ethernet, and
waiting for an answer. The RARP server fills an Ethernet reply packet up with
the target's Internet Address and sends it.
The Address Resolution Protocol (ARP) basically provides a method of
converting protocol addresses (e.g., IP addresses) to local area network
addresses (e.g., Ethernet addresses). The RARP protocol module supports
systems which do not support the BOOTP protocol (next paragraph).
BOOTP Protocol Module
The Bootstrap Protocol (BOOTP) basically allows a diskless client machine to
discover its own IP address, the address of a server host, and the name of a file
to be loaded into memory and executed.
TFTP Protocol Module
The Trivial File Transfer Protocol (TFTP) is a simple protocol to transfer files.
It is implemented on top of the Internet User Datagram Protocol (UDP or
Datagram) so it may be used to move files between machines on different
networks implementing UDP. The only thing it can do is read and write files
from/to a remote server.
