In an $8085$ microprocessor system with memory mapped $\text{I} / \mathrm{O}$,
- $\text{I/O}$ devices have $16$-bit addresses
- $\text{I/O}$ devices are accessed using $\text{IN}$ and $\text{OUT}$ instructions
- there can be a maximum of $256$ input devices and $256$ output devices
- arithmetic and logic operations can be directly performed with the $\text{I/O}$ data.