4
votes
2answers
139 views

32-bit to 64-bit skipping 48-bit?

Computer architecture upgraded from 16-bit to 32-bit to 64-bit. What was the logic for skipping 48-bit? What reasoning was used to upgrade to 64-bit and not some other exponent? The following tables ...
0
votes
0answers
24 views

How are graphics produced on the screen?

I have been trying to get a complete answer to this for a long time and I know it is complex. For example lets say we wanted to produce the character 'H' on the screen. H is 72 in ascii or 48 in Hex ...
0
votes
1answer
32 views

How does an instruction in a CPU report that is has finished?

When an instruction is sent to a CPU, that may take multiple clock cycles to complete, when does the CPU know that the instruction has finished and can start processing the next one? I'm mostly ...
2
votes
1answer
183 views

How interrupts and privilege levels work?

I'm trying to get a better understanding of how interrupts work (both hardware and software) and the privileges that go with them. If we use the NIC as an example. When the OS creates the IDT, does ...
52
votes
9answers
7k views

Why have CPU manufacturers stopped increasing the clock speeds of their processors? [closed]

I have read that manufacturers stopped concentrating on higher clock speeds and are now working on other things to improve performance. With an old Desktop machine with Intel® Xeon® Processor E3110 ...
4
votes
4answers
3k views

How can I find a list of all SSE instructions? What happens if a CPU doesn't support SSE?

So I've been reading about how processors work. Now I'm on the instructions (SSE, SSE2, etc) stuff. (Which is pretty interesting). I have lot of questions (I've been reading this stuff on Wikipedia): ...
0
votes
1answer
789 views

Is little-endian still faster on Intel processors or it does not matter if I parse big-endian on intel? [closed]

It used to be in past architectures. Is it still the case? I am reading from the network into byte buffers in Java. Basically, will read bytes on Intel using big-endian instead of little-endian ...
1
vote
2answers
190 views

Hardware. What is the difference between a port and a bank?

Especially, these days, the distinction between them is very confusing.. For example, NVidia's shared memory is 32-banked, so what they say is in one cycle, 32 data can come out at the same time... ...
11
votes
3answers
617 views

Will a new processor with slower clockspeed run legacy applications faster?

I'm using Linux and have an old P4 with about 3 GHz clock speed. Will a newer chip that had slower clock speed run my legacy applications faster or slower? I only use one application at a time, an ...
5
votes
3answers
4k views

What do the terms “asynchronous” and “synchronous” mean, with respect to the definition of an interrupt?

Quoted from http://en.wikipedia.org/wiki/Interrupt: an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in software indicating the need for a change ...
5
votes
1answer
459 views

Intel's AES-NI performance: Isn't the hard drive the bottleneck?

Will I see a performance gain with AES-NI using dm-crypt/LUKS for hard drive system encryption? Isn't the hard drive the bottleneck even without hardware acceleration?
57
votes
6answers
11k views

How does a CPU 'know' what commands and instructions actually mean?

How does a processor 'know' what the different commands mean? I'm thinking of assembly level commands like MOV, PUSH, CALL, etc...
2
votes
0answers
222 views

How to tell if an EXE is 32-bit or 64-bit? [duplicate]

Possible Duplicate: Quick way to tell if an installed application is 64-bit or 32-bit What's the easiest way to know if a Windows EXE is 32-bit or 64-bit?
12
votes
10answers
43k views

How can I determine if the current version of Windows is either 32-bit or 64-bit from the command line? [duplicate]

What's the command line to find out if the OS is running a 32-bit version or 64-bit of Windows?
143
votes
19answers
25k views

32-bit vs. 64-bit systems

What are the differences between 32-bit and 64-bit systems? If you have used both of them, what kind of sharp differences have you experienced? Would it be a problem to use 32-bit programs on ...
27
votes
9answers
123k views

How can I enable PAE on Windows 7 (32-bit) to support more than 3.5 GB of RAM?

I know that Windows XP 32-bit can be configured, through PAE, to support more than 3.5 GB of RAM. Is there a good tutorial to do this with Windows 7 32-bit? As to why I don't simply use 64-bit ...