8085

In 1974,Intel released the first general purpose microprocessor 8080.This CPU was not functionally complete and the first 8-bit functionally complete CPU 8085 was introduced in Mar 1976.

The 8085 CPU is still the most popular one amongst all the 8-bit CPUs.The 8085 CPU houses an on-chip clock generator and provides good performance utilizing an optimum set of registers and a reasonably powerful ALU.The major limitations of these 8-bit microprocessors are their limited memory addressing capacity,slow speed of execution,limited number of scratchpad registers non-availability of complex set of instructions and addressing mode.There is a non-availability of instruction queue which makes the execution as serial.The architecture of 8085 can be seen in the image.

Features
64KB of memory size
256 Input ports
256 Output ports
manufacturing process is 3 micron
clock speed of 2MHz
Bus speed of 2MHz
Typical use
Toledo scale. Computed cost from weight and price. High level of integration, operating for first time on a single 5-volt power supply (down from 12 volts).