Microprocessor
Program counter in a digital computer

 Counts the numbers of programs run in the machine.
 Counts the number of times a subroutine is called.
 Points the memory address of the next instruction to be fetched.
 Counts the number of times the loops are executed.

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Microprocessor
In 8085 microprocessor system with memory mapped I/O, which of the following is true?

 Arithmetic and logic operations can be directly performed with the I/O data
 There can be maximum of 256 input devices and 256 output devices
 Devices are accessed using IN and OUT instructions
 Devices have 8-bit address line

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