Microprocessor
PUSH B instruction in 8085 microprocessor causes

 registers B & C to be cleared
 the contents of register B only to be copied in the stack
 the contents of register B & C to be copied in the stack
 the contents of registers B & C to be transferred in the stack and and the registers get cleared

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

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

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