In order to interface more than 64K of memory using the 085, you would need an external address register, perhaps maintained by the 8255, which contained an offset register for part of the memory address space. This would be similar to how the 8086/8088 processors implemented expanded memory before using the 80386 and above processors.
Intel 8253 is a programmable timer and it can be interfaced to 8085. This can be used as a real time clock, square wave generator and this is possible because 8253 can create accurate time delays.
we want relay interface with 8085 and also attech the program
The 8085 can address 216, or 65536 different memory locations.
explain how slow memory get interfaced with 8085
Yes and no. All memory location from 0H to 0FFFFH are addressable, but some of them are needed for the program, interrupt vectors, and the stack, so you would need to pay attention to where things are located in memory to design an appropriate program. In addition, if your system is using memory mapped I/O, some locations will be reserved.
terminal
READY
The 8085 was replaced with the 8086/8088. As such, there is no 16 bit version of the 8085.
8 bits
64 kb
Registers or RAM-memory.
64K