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Debugger General Information
Reset
B
Abort
B-8
Pressing and releasing the MVME177 front panel RESET switch
initiates a system reset. COLD and WARM reset modes are
available. By default, 177Bug is in COLD mode. During COLD
reset, a total system initialization occurs, as if the MVME177 had
just been powered up. In other words, during a COLD reset:
All static variables (including disk device and controller
parameters) restore 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
The first two serial ports are reconfigured to their default state
During WARM reset, the 177Bug preserves the following:
Variables
Tables
Target state registers
Breakpoints
Reset must be used if the processor ever halts, or if the 177Bug
environment is ever lost (vector table is destroyed, stack corrupted,
etc.).
You can initiate an abort by pressing and releasing the ABORT
switch on the MVME177 front panel. If an abort is initiated while
executing a user program (running target code), a ÒsnapshotÓ of the
processor state is captured and stored in the target registers. For
this reason, abort is most appropriate when terminating a user
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