8085s

The 8085 microprocessor is an 8-bit central processing unit (CPU) designed and manufactured by Intel and introduced in 1977. It is a plug-compatible derivative of the Intel 8080, with some enhancements. The 8085 features a 16-bit address bus, allowing it to directly address up to 64 KB of memory, and an 8-bit data bus for transferring data. It has a set of 74 instructions.

One of the key improvements of the 8085 over its predecessor was the integration of several support functions onto the chip itself, such as clock generation and bus control. This reduced the need for external support circuitry, simplifying system design and lowering costs. The 8085 uses a single +5V power supply, unlike the 8080 which required multiple voltages.

The microprocessor has a 40-pin dual in-line package (DIP) and operates at clock speeds typically ranging from 3 MHz to 5 MHz. It supports interrupts, allowing external devices to signal the CPU for attention. The 8085 was widely used in various applications, including microcomputers, embedded systems, and industrial control systems during the late 1970s and 1980s. Its programming model includes general-purpose registers, an accumulator, flag register, program counter, and stack pointer. The instruction set includes arithmetic, logical, data transfer, branching, and I/O operations.