# Question: How Many Memory Addresses Are There?

## What is the size of memory address?

As I mentioned before, it’s the size of a machine word.

Machine word is the amount of memory CPU uses to hold numbers (in RAM, cache or internal registers).

32-bit CPU uses 32 bits (4 bytes) to hold numbers.

Memory addresses are numbers too, so on a 32-bit CPU the memory address consists of 32 bits..

## How many total memory addresses are there for a 64 bit computer?

In principle, a 64-bit microprocessor can address 16 EiBs (16 × 10246 = 264 = 18,446,744,073,709,551,616 bytes, or about 18.4 exabytes) of memory. However, not all instruction sets, and not all processors implementing those instruction sets, support a full 64-bit virtual or physical address space.

## How do I calculate an address size?

Step 1: calculate the length of the address in bits (n bits) Step 2: calculate the number of memory locations 2^n(bits) Step 3: take the number of memory locations and multiply it by the Byte size of the memory cells.

## Is ROM or RAM faster?

RAM is a high-speed memory, with reading-write operations, happen at a fast pace whereas ROM is slower speed memory, which is less prone to modification and can be done via an external program.

## How do I find my memory address range?

The first address of memory 1 is 2000h = 8192. Memory 2 starts at 3000h, or 0011 0000 0000 0000 etc. So you can see that the binary digits in the 13th, 14th and 15th positions correspond to the starting addresses of the 4 memories: 0010 = memory 1, 0011 = memory 2, 0100 = memory 3 and 0101 = memory 4.

## What is a 32 bit address?

A 32-bit address is the address of a single byte. Thirty-two wires of the bus contain an address (there are many more bus wires for timing and control). Sometimes people talk about addresses like 0x2000, which looks like a pattern of just 16 bits.

## Is cache faster than RAM?

Since the cache memory is faster than RAM, and because it is located closer to the CPU, it can get and start processing the instructions and data much more quickly. The same procedure is carried out when data or instructions need to be written back to memory.

## What is the size of a memory?

For most personal computers, the memory size at each location is 8 bits or one byte. Larger computers, though, can store more than 8 bits at each memory location and we then start talking about the word size of a location rather than the byte size.

## What does a memory address look like?

Memory addresses are 32-bits long on most CPUs today, although there is a increasing trend toward 64-bit addressing). The location of i has a specific address, in this case 248,440. The pointer p holds that address once you say p = &i;. The variables *p and i are therefore equivalent.

## How many locations of memory can you address with 12 bit memory address?

4096 locationsEach memory location is one byte, while the address is 12-bit, with the capability to address up to 4096 locations.

## What is the largest binary number in 12 bits?

1sAnswer and Explanation: The largest binary number that can be expressed with 12 bits is all 1s, which means 1 followed by 1 followed by 1, up to 12 times.

## What does 32 bits mean?

32-bit and 64-bit are commonly used to describe processor architecture or design. A 32-bit processor includes a 32-bit register, which can store 232 or 4,294,967,296 values. … What’s important is that a 64-bit computer (which means it has a 64-bit processor) can access more than 4 GB of RAM.

## How many memory locations are there?

For example, an 8-bit-byte-addressable machine with a 20-bit address bus (e.g. Intel 8086) can address 220 (1,048,576) memory locations, or one MiB of memory, while a 32-bit bus (e.g. Intel 80386) addresses 232 (4,294,967,296) locations, or a 4 GiB address space.

## Why are there 12 bits for the memory address?

In computer architecture, 12-bit integers, memory addresses, or other data units are those that are 12 bits (1.5 octets) wide. … Hence, a microprocessor with 12-bit memory addresses can directly access 4096 words (4 Kw) of word-addressable memory.

## Which is the fastest memory?

Fastest memory is cache memory.Registers are temporary memory units that store data and are located in the processor, instead of in RAM, so data can be accessed and stored faster.More items…

## How do memory addresses work?

A memory address is a unique identifier used by a device or CPU for data tracking. This binary address is defined by an ordered and finite sequence allowing the CPU to track the location of each memory byte. … Before CPU processing, data and programs must be stored in unique memory address locations.

## How much RAM can 64 bit use?

64 bit computing Modern 64-bit processors such as designs from ARM, Intel or AMD are typically limited to supporting fewer than 64 bits for RAM addresses. They commonly implement from 40 to 52 physical address bits (supporting from 1 TB to 4 PB of RAM).

## What is the fastest most expensive memory in your computer?

Cache memoryA typical computer has 3 types of memory: Cache memory, Random Access Memory (RAM), and virtual memory. Cache is the fastest and most expensive, RAM is slower and less expensive, and virtual memory is the slowest and least expensive type.

## Why does 32 bit still exist?

Microsoft offers a 64-bit OS in Windows 10 that runs all 64-bit and all 32-bit programs. … The 32-bit version is inherently less secure. By choosing 32-bit Windows 10 a customer is literally choosing a lower performance, LOWER SECURITY, Operating System that is artificially hobbled to not run all software.

## Is Windows XP 32 bit?

Determine if Windows XP is 32-bit or 64-bit In the General tab of the System Properties window, if it has the text Windows XP, the computer is running the 32-bit version of Windows XP. If it has the text Windows XP Professional x64 Edition, the computer is running the 64-bit version of Windows XP.

## Where are memory addresses stored?

They are typically stored inside the code of the program. Sometimes the program will want to calculate addresses as well, off of some base value. The addresses are not stored in memory, unless you want them to be.