RadiSys EPC-2 Hardware Reference Manual
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Contents
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3. OperationThis chapter contains information about user operation of the EPC-2.System ResetThere are several ways for the operator to perform a system reset: pressing the resetswitch on the front panel, simultaneously pressing the CTRL+ALT+DEL keys on thekeyboard, invoking the BIOS setup program and following its instructions for reset, andpower-off/power-on.The reset switch performs a hardware reset of the EPC-2 and invokes the BIOS initial-ization routine, which performs a selftest of the hardware, initializes the EPC-2 hard-ware, locates the disk drives, and tries to boot an operating system.If a keyboard is attached, pressing the CTRL+ALT+DEL keys causes a trap to the BIOSfor a software-controlled reset. It is similar to pressing the reset switch, except no initialhardware reset occurs and only a subset of the selftest is performed. Unlike the resetswitch, CTRL+ALT+DEL sometimes has no effect. The reason is that it is handled bysoftware, and if the EPC-2 is currently "hung" somewhere in the operating system orapplication program in a state where interrupts are disabled, or if software has takencontrol of the keyboard interrupt, the CTRL+ALT+DEL sequence has no way ofinterrupting the software.Removing and reapplying power to the EPC-2 also causes a hardware reset.* DISK DEVICES THAT AUTOMATICALLY PARK THEIR HEADS HAVEBEEN KNOWN TO FAIL OCCASIONALLY IF POWER IS REAPPLIED TOOQUICKLY . AFTER REMOVING POWER , WAIT 10 SECONDS OR MOREBEFORE REAPPLYING POWER.Generating VXIbus SYSRESETWhen power is applied, the EPC-2 drives the VXIbus SYSRESET signal for at least theminimum time required by the VXIbus specification. Resetting the EPC-2 via the resetPage 13Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com |
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