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Why is the data bus in most microprocessors bidirectional while the address bus is unidirectional?
Data Bus: These lines are used to send data to memory by output ports and to receive data from memory by input ports. Thus, data bus lines are bi-directional.
Address Bus: On these lines the CPU send out the address of the memory location or I/O port that is to be written to or read from. Here, the communiation is one-way, the address is send from CPU to memory and I/O port and as these lines are unidirectional.
What is the max no of match code Id's that can be defined for one Match code object? A match code Id is a single character ID that can be a letter or a number.
A subroutine can contain nested form and endform blocks. False.
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