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Questions tagged [addressing]

153 questions
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data bus and addressing memory confusion

I have learned 8086 CPU has 16bit data bus, and Pentium CPU has 32bit data bus, which mean each memory address holds size of data bus. For example: 16bit = 2^16 = 65,536 binary 0000 0000 0000 0000 ~ 1111 1111 1111 1111 hex 0000 0000 ~ FFFF…
Jeungwoo Park
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Why am I getting a -1 for the network prefix length in Java?

So I'm writing a program that creates a list of all of the IP addresses from the Network address to the Broadcast address and then looping through them and checking if they are available. The code I have works perfectly fine on wired networks, but…
Jonathan Iannacone
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C# foreaching through list won't change values

I have a struct holding condition informations. private struct hintStructure { public string id; public float value; public bool alreadyWarned; } private List hints; Whenever my program changes a value, an event is…
Jonas Zimmer
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Why 32-bit processor can only address 4GiB of memory, even with large word size?

Until now I thought that a 32-bit processor can use 4 GiB of memory because 232 is 4 GiB, but this approach means processor have word size = 1 byte. So a process with 32-bit program counter can address 232 different memory words and hence we have 4…
mightyWOZ
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x86 Intel Assembler LEA

looking at the following code: (ebp-0x8 -> int) (ebp-0x4 -> int*) => 0x80483f3 : mov DWORD PTR [ebp-0x8],0x0 0x80483fa : mov DWORD PTR [ebp-0x4],0x0 0x8048401 : mov DWORD PTR [ebp-0x8],0xa 0x8048408…
Michael
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Transform based indexed mode to indirect addressing mode (x86 assembly)

I am using x86 AT&T Assembly on Ubuntu. I need to rewrite any complex indirect addressing modes, like based indexed mode, into simple indirect addressing mode. For example, take this snippet: .L4: movl i, %eax movzbl ch, %edx movb …
Lorenz Leitner
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Difference between IP address and MAC address?

I know they are address schemes used in different layers, and that IPV4 is 32 bits while MAC is 48 bits. My questions are: Why do we need two different address schemes? What is the problem if we decided to use the same address for both purposes?…
LYH
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addressing in assembler

There is something I can't digest. I'm learning some assembler and right now I'm at the chapter with addressing. I understand the concept of brackets for dereferencing, but somehow when I see the usage of it I just can't soak up the point of it. To…
Pyjong
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How do i check a ip address range whether it falls in Class A,Class B,Class C

import java.net.*; import java.io.*; public class ip_host { public static void main(String args[]) throws Exception { System.out.println("Enter the host name :"); String n = new DataInputStream(System.in).readLine(); …
MajoR
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Addressing an index in array in Lua

I am trying to write a simple game using Love 2d engine. It uses lua as the scripting language. I have some problems with arrays and can't find any solution. Here is my issue: for i = 1, 10 do objects.asteroids = {} objects.asteroids[i] =…
Paweł Jastrzębski
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Passing an Array of an Array to a subroutine using perl

Ok, so I got an array of an array (AoA) and I need to pass it to a subroutine, and then access it. This works… but is it strictly correct and indeed is there a better way that I should be doing this? #!/usr/bin/perl $a =…
user3069232
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x86 and MIPS memory addressing

I have a question on memory addressing on x86 and MIPS. Now I am taking a computer organization class at my school and havin trouble because the professor's explanation is not so clear to me. What I know about the memory addressing is below. The…
eChung00
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MIPS label addressing?

This is all related, and I tried to piece it all together as logically as I could, so please bear with me. I'm really confused as to how to properly address labels. For example, in the following bit of code, "bne" translates to…
Laurence
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C++ hashing: Open addressing and Chaining

For Chaining: Can someone please explain this concept to me and provide me a theory example and a simple code one? I get the idea of "Each table location points to a linked list (chain) of items that hash to this location", but I can't seem to…
forthewinwin
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Determining the number of address lines and RAM word size using C

Can anyone please let me know how to deterimine the number of address lines in a processor using C ? This can't be equal to size of the processor registers since the number of address lines may be different compared to the size of registers (for…
mezda
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