Navatek Engineering specialises in advanced PC-based digital board testers and troubleshooting tools for processor-based boards. The company's NT5000 CPU Commander fits in a single PC slot and interfaces to the unit under test through one or more ROM sockets or clip-overs. Its monitor program takes control of the UUT and performs high-level test functions without the need for assembly or any other programming language. If needed, resident diagnostic code can be executed while the NT5000 CPU Commander is connected using its ROM overlay memory.
A Windows graphical user interface is included with built-in functions such as memory read, memory write, I/O read, I/O write which provide full access to the UUT. Higher level functions such as bus diagnostics, memory tests, memory move and copy operations can also be executed with a single command. A built in macro language supports easy development of complex test procedures without the need to learn a programming language. For custom test systems, the NT5000 CPU Commander can interface to any programming language capable of supporting DLLs such as Visual C, Visual Basic, Delphi, LabView and LabWindows.
To troubleshoot 'dead kernel' boards, the standard BusTest command is able to quickly identify any hardware or timing problems occurring on the boot path of the processor. An 8K deep trace buffer and a user-programmable breakpoint further enhance the NT5000's trouble-shooting capabilities. Other equipment such as an oscilloscope can be synchronised to any CPU bus cycle using the cross trigger bus. Finally, an optional logic probe is available to probe UUT nodes beyond the kernel. A powerful node test system allows known good responses from a reference UUT to be stored in a library for immediate comparison against the board under test. Selecting a node test automatically invokes the correct stimulus, captures the results and compares them against the reference library. A 'pass' or 'fail' message can be displayed or further instructions to the operator can be issued, pending the result of each node test.
The NT5000 CPU Commander supports all CPUs that boot from external ROM. The boot path width supported can be 8, 16 or 32 bits wide and both EPROM and flash-based designs can be supported. A boundary scan interface is provided to integrate other test methods.
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