Motorola MVME187 manual Reset, During COLD reset, During WARM reset, Abort

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Debugger General Information

Reset

Pressing and releasing the MVME187 front panel RESET switch initiates a system reset.

Reset must be used if the processor ever halts, or if the 187Bug environment is ever lost (vector table is destroyed, stack corrupted, etc.).

❏COLD and WARM reset modes are available.

❏By default, 187Bug is in COLD mode.

During COLD reset:

1.A total system initialization takes place, as if the MVME187 had just been powered up.

2.All static variables (including disk device and controller parameters) are restored to their default states.

3.The breakpoint table and offset registers are cleared.

4.The target registers are invalidated.

5.Input and output character queues are cleared.

6.Onboard devices (timer, serial ports, etc.) are reset, and

7.The first two serial ports are reconfigured to their default state.

During WARM reset:

1.The 187Bug variables and tables are preserved, as well as the target state registers and breakpoints.

Abort

Abort is invoked by pressing and releasing the ABORT switch on the MVME187 front panel.

Abort should be used to regain control if the program gets caught in a loop, etc.

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