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Computer coprocessor debugging circuit

2017-08-15 08:35  
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A coprocessor is a computer processor used to supplement the functions of the primary processor (the CPU). Operations performed by the coprocessor may be floating point arithmetic, graphics, signal processing, string processing, encryption or I/O Interfacing with peripheral devices. By offloading processor-intensive tasks from the main processor, coprocessors can accelerate system performance. Coprocessors allow a line of computers to be customized, so that customers who do not need the extra performance need not pay for it.The IBM PC debugger plugs into the PC`s math-coprocessor socket.The8288 bus controller, IC1, regenerates control signals from the processor`s status signals, SO, Sl, and S2. ResetLED Dllights if reset is active and holding the processor. Clock status LED D3 indicates that the processor is receiving a toggling clock signal.The address-decode logic detects when the processor is doing a jump-on-reset to the PC`s BIOS ROM`s power-on; self-test then detects a fatal error and halts the processor.In-Circuit Debugger/Programmer uses in-circuit debugging logic incorporated into each chip with Flash memory toprovide a low-cost hardware debugger and programmer. In-circuit debuggingoffers these benefits:Low cost,Minimum of additional hardware needed for debug,Expensive sockets or adapters are not required.