RELIANCE 45C20A Thermal resistance card

After this message, there is a delay to let you abort the Auto Boot process if you wish. Then the actual I/O is begun: the program pointed to within the volume ID of the media specified is loaded into RAM and control passed to it. If, however, during this time you want to gain control without Network Boot, you can press thekey or the software ABORT or RESET switches. Network Auto Boot is controlled by parameters contained in the NIOT and ENV commands. These parameters allow the selection of specific boot devices, systems, and files, and allow programming of the Boot delay. Refer to the ENV command description in Chapter 3 for more details. 

Restarting the System 

 You can initialize the system to a known state in three different ways: Reset, Abort, and Break. Each method has characteristics which make it more suitable than the others in certain situations. A special debugger function is accessible during resets. This feature instructs the debugger to use the default setup/operation parameters in ROM instead of your own setup/operation parameters in NVRAM. To activate this function, you press the RESET and ABORT switches at the same time. This feature can be helpful in the event that your setup/operation parameters are corrupted or do not meet a sanity check. Refer to the ENV command description in Chapter 3 for the ROM defaults.

Powering up the MVME172LX initiates a system reset. 

Resets can also be asserted through the RESET switch on the MVME172LX front panel, or by software. For details on resetting the MVME172LX board through software, refer to the MVME172 Embedded Controller Programmer’s Reference Guide. Both “cold” and “warm” reset modes are available. By default, 172Bug is in “cold” mode. During cold resets, a total system initialization takes place, as if the MVME172LX had just been powered up. All static variables (including disk device and controller parameters) are restored to their default states. The breakpoint table and offset registers are cleared. The target registers are invalidated. Input and output character queues are cleared. Onboard devices (timer, serial ports, etc.) are reset, and the two serial ports are reconfigured to their default state.

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