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question 1 why is the hamming error-correcting code mechanism not supplied as standard in pcs2 what are the main
question 1 describe how the 68451 mmu translates logical addresses into physical addresses2 the 68451 mmu employs a
question design an error-logging system for an error-detecting and -correcting memory whenever an error is detected a
question 1 what is a modified hamming code and what are its advantages over a standard hamming code2 hamming codes
question 1 what is the difference between fec and arq from the point of view of error correction and why can they both
question 1 why do 16-bit microprocessors with byte readwrite capabilities make life difficult for the designer of
question 1 what are the conditions necessary to implementa single error detectionb single error correctionc double
question 1 what would happen if a 68020 processor attempted to access a nonexistent floating point coprocessor
question 1 why cannot the 68000 be used in conjunction with the 68451 mmu to design true virtual memory systems2 why
question 1 what is the difference between a pmmu page descriptor and a table descriptor why are both these descriptors
question 1 how would you program the pmmus tc register to implement a two-level page system with a page size of 8
question 1 in what ways are the 68030 transparent address translation register rather like the 68451 mmu and in what
question 1 why is it much harder to design a data cache than an instruction cache2 to what extent do the 68020
question 1 the 68000 interrupt structure requires several external packages if its full facilities are to be used
question 1 suppose you require more than 192 interrupt vectors can you locate some of the additional vectors in the
question 1 a manual interrupt can be implemented by connecting irq7 to a push button each time the button is depressed
question 1 what does context switching mean and how can it be implemented making best use of the 68000 features2 write
question 1 why does the 68000 have a supervisor mode in contrast to many 8-bit microprocessors what instructions are
question write a trace exception handling routine that displays the contents of registers whenever an instruction is
question 1 what are the differences between traps illegal instruction exceptions and line a and line f exceptions2
question 1 after an exception the program counter is saved on the supervisor stack what does this value of the pc point
question 1 why does the location of the 68000s reset vectors cause the system designer so many problems why are the
question 1 describe the 68000s berr exception sequence explain why the 68000 berr sequence is limited by comparison
question 1 what is the effect of the stop f instruction and how do you think it might be used2 design a circuit that
question 1 how can a systems designer use the 68000 function code outputs to enhance the design of a microcomputer2 how