Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 has multiplexed bus, whereas 6800 does not have
 8085 has 5 interrupts lines, whereas 6800 has only two
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O
 None

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

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

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