8C-PCNT01模块卡件,HONEYWELL产品颜色
按下并释放“断开”键可生成“断开”控制台终端键盘。
❏ 中断不会生成中断。
❏ 唯一可以识别的时断是在发送字符时或由控制台端口接收。
很多时候，可能需要终止调试器命令竣工前；例如，在显示大型内存块。Break允许您终止命令。中断序列1.删除代码中的任何断点，并保留断点表完好无损。
2使用系统调用输入。然后可以访问该机器状态以便于诊断。
8C-PCNT01模块卡件SYSFAIL*断言/否定在重置/通电条件下，调试器断言VMEbusSYSFAIL*线路（参考VMEbus规范）。SYSFAIL*保持如果发生以下任何情况，则断言：
❏ 置信度测试失败NVRAM校验和错误
❏ NVRAM电池电量低
❏ 本地内存配置状态
❏ 自检（如果系统模式）已完成，但出现错误
❏ MPU时钟速度计算失败调试器初始化完成后，上述操作都没有出现这种情况时，SYSFAIL*行被否定。这向用户或VMEbus主机指示调试器的状态。在多计算机配置中，其他VMEbus主机可以查看相关的控制和状态寄存器以确定
CPU正在断言SYSFAIL*。SYSFAIL*断言/否定也是受ENV命令的影响。参考附录A。
MPU时钟速度计算计算并检查微处理器的时钟速度针对NVRAM中包含的用户可定义参数（请参阅附录A中的CNFG命令）。如果检查失败，则发出警告显示消息。
A “Break” is generated by pressing and releasing the BREAK key on
the console terminal keyboard.
❏ Break does not generate an interrupt.
❏ The only time break is recognized is when characters are sent
or received by the console port.
Many times it may be desirable to terminate a debugger command
prior to its completion; for example, during the display of a large
block of memory. Break allows you to terminate the command. Break Sequence
1. Removes any breakpoints in your code and keeps the
breakpoint table intact.
2. Takes a snapshot of the machine state if the function was
entered using SYSCALL. This machine state is then accessible
to you for diagnostic purposes.
SYSFAIL* Assertion/Negation
Upon a reset/powerup condition the debugger asserts the VMEbus
SYSFAIL* line (refer to the VMEbus specification). SYSFAIL* stays
asserted if any of the following has occurred:
❏ Confidence test failure
❏ NVRAM checksum error
❏ NVRAM low battery condition
❏ Local memory configuration status
❏ Self test (if System Mode) has completed with error
❏ MPU clock speed calculation failure
After debugger initialization is done and none of the above
situations have occurred, the SYSFAIL* line is negated. This
indicates to the user or VMEbus masters the state of the debugger.
In a multi-computer configuration, other VMEbus masters could
view the pertinent control and status registers to determine which
CPU is asserting SYSFAIL*. SYSFAIL* assertion/negation is also
affected by the ENV command. Refer to Appendix A.
MPU Clock Speed Calculation
The clock speed of the microprocessor is calculated and checked
against a user definable parameter contained in NVRAM (refer to
the CNFG command in Appendix A). If the check fails, a warning
message is displayed.
