Motorola MVME187 manual Starting Up 187Bug, Autoboot Sequence

Models: MVME187

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Starting Up 187Bug

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Debugger General Information

Starting Up 187Bug

1.Verify that the MVME187 is properly installed and operating as described in Table 3-1 on page 3-2.

2.Power up the system. 187Bug executes some self-checks and displays the debugger prompt 187-Bug>(if 187Bug is in Board Mode). However, if the ENV command (Appendix A) has put 187Bug in System Mode, the system performs a selftest and tries to autoboot. Refer to the ENV and MENU commands listed in Table 5-1.

If the confidence test fails, the test is aborted when the first fault is encountered. If possible, an appropriate message is displayed, and control then returns to the menu.

Autoboot

Autoboot is a software routine that is contained in the 187Bug EPROMs to provide an independent mechanism for booting an operating system.

Autoboot Sequence

1.The autoboot routine automatically scans for controllers and devices in a specified sequence until a valid bootable device containing a boot media is found or the list is exhausted.

2.If a valid bootable device is found, a boot from that device is started.

The controller scanning sequence goes from the lowest controller Logical Unit Number (LUN) detected to the highest LUN detected. (Controllers, devices, and their LUNs are listed in Appendix B).

3.At powerup, Autoboot is enabled, and if the drive and controller numbers encountered are valid, the system console displays the following message:

"Autoboot in progress... To abort hit <BREAK>"

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Page 88
Image 88
Motorola MVME187 manual Starting Up 187Bug, Autoboot Sequence