ICS TRIPLEX T8220 CPU module

There are three ways to change the parameter tables: 

❏ Use BO or BH. When you invoke one of these commands, the configuration area of the disk is read and the parameters corresponding to that device are rewritten according to the parameter information contained in the configuration area. (Appendix D has more information on the disk configuration area.) This is a temporary change. If a cold-start reset occurs, then the default parameter information is written back into the tables. 

❏ Use IOT. You can use this command to reconfigure the parameter table manually for any controller and/or device that is different from the default. This is also a temporary change and is overwritten if a cold-start reset occurs. 

❏ Obtain the source. You can then change the configuration files and rebuild 16XBug so that it has different defaults. Changes made to the defaults are permanent until changed again.

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 identify 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. Figure 1-1 depicts the various modules (capabilities) and the dependencies of these modules that support the overall network boot function. They are described in the following paragraphs.

Intel 82596 LAN Coprocessor Ethernet Driver 

This driver manages/surrounds the Intel 82596 LAN Coprocessor. 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.

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