MVME5100 Single Board Computer Installation and Use - Bustec
MVME5100 Single Board Computer Installation and Use - Bustec
MVME5100 Single Board Computer Installation and Use - Bustec
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2Operation2IntroductionThis chapter provides operating instructions for the <strong>MVME5100</strong> singleboard computer. It includes necessary information about powering up thesystem along with the functionality of the switches, status indicators, <strong>and</strong>I/O ports on the front panels of the board.Switches <strong>and</strong> IndicatorsThe front panel of the <strong>MVME5100</strong> as shown in Figure 1-1, incorporatesone dual function toggle switch (ABT/RST) <strong>and</strong> two light-emitting diode(LED) status indicators (BFL, CPU) located on the front panel.ABT/RST SwitchAbort FunctionThe ABT/RST switch operates in the following manner: if pressed for lessthan five seconds, the ABORT function is selected, if pressed for more thanfive seconds, the RESET function is selected. Each function is describedbelow, as well as “safe restart” instructions involving the ABT/RST switch.When toggled to ABT, the switch generates an interrupt signal to theprocessor. The interrupt is normally used to abort program execution <strong>and</strong>return control to the debugger firmware located in the processor <strong>and</strong> Flashmemory.The interrupt signal reaches the processor via ISA bus interrupt line IRQ8.The interrupter connected to the ABORT switch is an edge-sensitive circuit,filtered to remove switch bounce.2-1
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