Why is 8085 called so?

When they made 8 bit processors, the double wide 4004 was the 8008, and the double wide 4040 was the 8080. The 8085 was the 5 volt only version of the 8080. When Intel made an upgraded 8085 into a 16 bit processor, the next number was 8086. They liked this, as it seemed to fit the 16 bit nature.

1. Why is it called 8085?
2. What is the meaning of 8085?
3. Why is 8086 called so?
4. Is 8086 still used?
5. What is meant by maskable interrupts?
6. How many registers are there in 8085?
7. How many instructions are there in 8085?
8. Why is data bus 16 bit?
9. Is the address bus bidirectional?
10. What are the flags in 8085?
11. Which flag of 8086 is not present in 8085?

Why is it called 8085?

The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in March 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.

What is the meaning of 8085?

8085 is pronounced as "eighty-eighty-five" microprocessor. It is an 8-bit microprocessor designed by Intel in 1977 using NMOS technology. It has the following configuration − 8-bit data bus. 16-bit address bus, which can address upto 64KB.

Why is 8086 called so?

Why is the Intel 8086 CPU called a 16-bit CPU? Because that's how Intel marketed it. The 8086 is part of “the range of 16-bit processors from Intel” (see for example Introduction to the iAPX 286, page 3-1). The 8086 Primer says “In 1978, Intel introduced the first high-performance 16-bit microprocessor, the 8086.”

Is 8086 still used?

The original 8086 was a chip with 29,000 transistors. ... People often ask “Why are we still using x86 CPUs?” as if this was analogous to “Why are we still using the 8086?” The honest answer is: We aren't.

What is meant by maskable interrupts?

1. Maskable interrupt is a hardware Interrupt that can be disabled or ignored by the instructions of CPU. A non-maskable interrupt is a hardware interrupt that cannot be disabled or ignored by the instructions of CPU.

How many registers are there in 8085?

The 8085 has six general - purpose registers to store 8-bit data; these are identified as B, C, D, E, H and L as shown in the figure.

How many instructions are there in 8085?

The 8085 (from Intel) is an 8-bit microprocessor. – The 8085 uses a total of 246 bit patterns to form its instruction set. – These 246 patterns represent only 74 instructions.

Why is data bus 16 bit?

The 8086 is a 16-bit CPU, so internally it can process data in 16-bit quantities. Having a 16-bit data bus means you can fetch and store such a quantity with a single memory access.

Is the address bus bidirectional?

Address bus - carries memory addresses from the processor to other components such as primary storage and input/output devices. The address bus is unidirectional . ... The data bus is bidirectional . Control bus - carries control signals from the processor to other components.

What are the flags in 8085?

8085 has five flags. Sign flag, zero flag, Auxiliary carry flag, Parity flag and Carry flag.

Which flag of 8086 is not present in 8085?

There exist total 5 flags (i.e., sign, zero, auxiliary carry, parity and carry flag) in 8085 microprocessor. As against overall 9 flags (i.e., overflow, direction, interrupt, trap and rest other of 8085) are present in 8086 microprocessor.