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DarkBASIC Professional Discussion / How many bytes is a single WORD?

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David R
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Posted: 21st Mar 2005 21:01
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Hi, I was wondering how many bytes were in a single WORD - I can't seem to find this info anywhere. Anyone know?


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Van B
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Posted: 21st Mar 2005 21:03
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2.

Doubleword (DWord) is 4


Van-B


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Jess T
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Posted: 21st Mar 2005 21:28
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Just for future reference;

Byte ( 8 bits )
Word ( 2 Bytes )
DWord ( 4 Bytes )
Integer ( 4 Bytes )
Float ( 4 Bytes )

Double Integer ( 8 Bytes )
Double Float ( 8 Bytes )


Jess.


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Van B
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Posted: 21st Mar 2005 21:33
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You forgot...

A Nibble (4 bits)

My own favourite , not that I've ever used it outside of my binary class though.


Van-B


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Chris K
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Posted: 21st Mar 2005 21:39 Edited at: 21st Mar 2005 22:37
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Strictly speaking (I think) a word varies in size depending on the processor. So for a 32 bit processor a word is 4 bytes. It's the amount of bytes it can process in one chunk. That's what they tell us in AS computing anyway...

but for DBPro a word is definately 2 bytes.

EDIT____________

More info:
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Jess T
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Posted: 21st Mar 2005 21:57
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Van, I actually put in both a bit and a Nibble, with that very description, but then took it out as it seemed irrelevant for people that aren't familiar with binary

Chris, that's interesting, thanks for the info

Jess.


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sengsjc
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Posted: 21st Mar 2005 23:33
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I hit this problem when I used to work in ARM32 assembler (GBA etc.) You get used to calling 32 bits a word (on those architectures it is) and then you go and talk to a PC programmer where it's 16 bits and you get all confused and forget your name and where you live etc.
And don't get me started on big endian and little endian systems grrrrrr.
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Jess T
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Posted: 21st Mar 2005 23:52
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lol.
So what's this about big endian and little endian?
Just kidding

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OSX Using Happy Dude
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Posted: 22nd Mar 2005 03:01
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Quote: "ARM32 assembler"

The best processor around...

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Three Score
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Posted: 23rd Mar 2005 11:38
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why did he not just look in the help files under "datatypes"

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Phaelax
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Posted: 23rd Mar 2005 13:16
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Quote: "So what's this about big endian and little endian?"


dont go confusing the newbies, the sizes stay the same.

a dword in java and i think c++ is 8 bytes

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Nicholas Thompson
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Posted: 23rd Mar 2005 17:18
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seriously - what is the difference, i've always wondered..

Is it something to do with which end the bit representing a decimal value of "1" is?

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Supremacy
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Posted: 23rd Mar 2005 20:04
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Quote: "what is the difference, i've always wondered.."


not much, but it myght be important if u need to know when a word ends , for data collecting porpuses.

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Cryptoman
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Posted: 23rd Mar 2005 20:23
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Big endian processors read MSB first.
Little read LSB first.
16 bit:
Big word 01 255=(1*256)+255 or 511
Little word 01 255=(255*256)+1 or 65281


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Nicholas Thompson
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Posted: 23rd Mar 2005 20:33
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Ahhh thought it was like that.. Cheers Trs80

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