sheepydee

22-03-09, 17:31

does anyone know how to read HEX codes ? this is really important yet i have no idea how to read it , and i dont know how to translate it or anything :( ,

any help much appreciated

any help much appreciated

View Full Version : Hex Codes??

sheepydee

22-03-09, 17:31

does anyone know how to read HEX codes ? this is really important yet i have no idea how to read it , and i dont know how to translate it or anything :( ,

any help much appreciated

any help much appreciated

Punaxe

22-03-09, 17:34

Go to the Windows calculator (Start -> Run -> calc), make sure the View is set to Scientific, select Hex (or press F5), type the hex code, and select Dec (or press F6).

This is of course assuming the hex code is a number; if it's text, use a converter (http://centricle.com/tools/ascii-hex/).

If you want to know how to read it yourself, the Wikipedia article (http://en.wikipedia.org/wiki/Hexadecimal) is always a good place to start.

This is of course assuming the hex code is a number; if it's text, use a converter (http://centricle.com/tools/ascii-hex/).

If you want to know how to read it yourself, the Wikipedia article (http://en.wikipedia.org/wiki/Hexadecimal) is always a good place to start.

jamieoliver22

22-03-09, 17:34

As in hex colour codes? Or hexadecimal?

I can read some hex colour codes, I know a few primary colours and mostly greys.

I can read some hex colour codes, I know a few primary colours and mostly greys.

sheepydee

22-03-09, 17:53

Go to the Windows calculator (Start -> Run -> calc), make sure the View is set to Scientific, select Hex (or press F5), type the hex code, and select Dec (or press F6).

This is of course assuming the hex code is a number; if it's text, use a converter (http://centricle.com/tools/ascii-hex/).

If you want to know how to read it yourself, the Wikipedia article (http://en.wikipedia.org/wiki/Hexadecimal) is always a good place to start.

Well for instance one of them was 7F so i put that in and it turned into 127 , but how am i supposed to know what it means??

This is of course assuming the hex code is a number; if it's text, use a converter (http://centricle.com/tools/ascii-hex/).

If you want to know how to read it yourself, the Wikipedia article (http://en.wikipedia.org/wiki/Hexadecimal) is always a good place to start.

Well for instance one of them was 7F so i put that in and it turned into 127 , but how am i supposed to know what it means??

Punaxe

22-03-09, 18:03

Well, hex is base-16, as opposed to base-10 that we're used to.

0 to 9 = 0 to 9, but after that, A, B, C, D, E, F = 10, 11, 12, 13, 14, 15.

Decimal: 74 = 7x10+4

Hexadecimal: 7F = 7x16+F

0 to 9 = 0 to 9, but after that, A, B, C, D, E, F = 10, 11, 12, 13, 14, 15.

Decimal: 74 = 7x10+4

Hexadecimal: 7F = 7x16+F

sheepydee

22-03-09, 18:06

Well, hex is base-16, as opposed to base-10 that we're used to.

0 to 9 = 0 to 9, but after that, A, B, C, D, E, F = 10, 11, 12, 13, 14, 15.

Decimal: 74 = 7x10+4

Hexadecimal: 7F = 7x16+F

O.o , im starting to understand a little :ton: but so...

Hexadecimal: 7F = 7x16+F

would that mean 7F = 7x16+127??

pardon my idiocy if im wrong as usual

0 to 9 = 0 to 9, but after that, A, B, C, D, E, F = 10, 11, 12, 13, 14, 15.

Decimal: 74 = 7x10+4

Hexadecimal: 7F = 7x16+F

O.o , im starting to understand a little :ton: but so...

Hexadecimal: 7F = 7x16+F

would that mean 7F = 7x16+127??

pardon my idiocy if im wrong as usual

AODdigger

22-03-09, 18:09

We studied this in 6th grade. Systems. I sucked really bad at them and PCs suck at 16oal systems...

Punaxe

22-03-09, 18:09

No, 7F = 7x16+F, and F=15, so 7F=7x16+15 = 127. Just 7x16 is only 112.

gidierre

22-03-09, 18:09

get one of the free hex editors available

there's nothing like starting to use it to get the gist of it all

(this way you''ll also be able to unveil the mystery behind punaxe's signature :p:p)

if you're thinking about something like disassembling machine code to read assembly operands, though, hex editors are just the beginning of a long journey ;)

there's nothing like starting to use it to get the gist of it all

(this way you''ll also be able to unveil the mystery behind punaxe's signature :p:p)

if you're thinking about something like disassembling machine code to read assembly operands, though, hex editors are just the beginning of a long journey ;)

AODdigger

22-03-09, 18:11

Sorry it's in Bulgarian. This helped me a while ago:

http://www.constructor.bg/mk/numbers.htm

http://www.constructor.bg/mk/numbers.htm

sheepydee

22-03-09, 18:36

D= this is really confuzzling but i cant give up because this is extremely important =S

AODdigger

22-03-09, 18:38

If you want I can translate a little from the site (:?

sheepydee

22-03-09, 18:48

If you want I can translate a little from the site (:?

yeas please =)

yeas please =)

AODdigger

22-03-09, 18:54

I'm starting from the top, window by window.

Converting between Two Different counting systems

Enter a number in the fields of one counting system (Hex, Decimal, etc) to convert to another one by pressing Превърни; to clear the fields press "Изчисти"

(the systems: decimal, hex, etc and their fields.)

Secondary counting system BINARY

Eight-al (octal) counting systam OCTAL

Ten counting system (which is in fact the system we use today everywhere, except the PCs, they use binary) DECIMAL

And the sixteen countable system (HEX)

and their formulas below.

/I'll translate the definition too if you want/

Converting between Two Different counting systems

Enter a number in the fields of one counting system (Hex, Decimal, etc) to convert to another one by pressing Превърни; to clear the fields press "Изчисти"

(the systems: decimal, hex, etc and their fields.)

Secondary counting system BINARY

Eight-al (octal) counting systam OCTAL

Ten counting system (which is in fact the system we use today everywhere, except the PCs, they use binary) DECIMAL

And the sixteen countable system (HEX)

and their formulas below.

/I'll translate the definition too if you want/

sheepydee

22-03-09, 18:58

oh my , =S im still kinda confused :( =S

AODdigger

22-03-09, 19:00

Ok. Chill. What don't you get?

sheepydee

22-03-09, 20:20

Ok. Chill. What don't you get?

well its just that all these numbers ahhhhhh! lol , like punaxe said all this stuff about 7F=7x16 or suttin its all just confusing =S

well its just that all these numbers ahhhhhh! lol , like punaxe said all this stuff about 7F=7x16 or suttin its all just confusing =S

Phys

22-03-09, 20:59

Ah I recently had to learn about this, Octal, and Binary in my computing course at college last week.

Punaxe

22-03-09, 21:10

well its just that all these numbers ahhhhhh! lol , like punaxe said all this stuff about 7F=7x16 or suttin its all just confusing =S

Let me try to explain a bit longer.

Take our own decimal (base-10) system. The number 1234 has a value of:

4x1 +

3x1x10 +

2x1x10x10 +

1x1x10x10x10

= 1234

Now this same number in hex (base-16), would mean:

4x1 +

3x1x16 +

2x1x16x16

1x1x16x16x16

= 4660

Right? Decimal uses multiplications of 10 (1, 10, 100, 1000), hexadecimal uses multiplications of 16 (1, 16, 256, 4096). When we start counting decimally we have the numbers 0 to 9, and after we reach 9, we have to use two figures: one to indicate how many times we already counted to 10, and one to indicate how far we're already on our way to one more time counting to 10. Then when this second figure reaches 9, we have to use yet another figure: to indicate how many times we've counted to hundred.

Because hexadecimal uses multiplications of 16, we have to able to count to 16 using only one figure. That's where the alphabet comes in handy: after 9, hexadecimal continues with A (10), B (11), C (12), D (13), E (14), and F (15). When counting, after we reach F, we have to use a second figure to indicate how many times we've already counted to 16, and so on.

Counting to 32 in hex:

1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1A, 1B, 1C, 1D, 1E, 1F, 20

Let me try to explain a bit longer.

Take our own decimal (base-10) system. The number 1234 has a value of:

4x1 +

3x1x10 +

2x1x10x10 +

1x1x10x10x10

= 1234

Now this same number in hex (base-16), would mean:

4x1 +

3x1x16 +

2x1x16x16

1x1x16x16x16

= 4660

Right? Decimal uses multiplications of 10 (1, 10, 100, 1000), hexadecimal uses multiplications of 16 (1, 16, 256, 4096). When we start counting decimally we have the numbers 0 to 9, and after we reach 9, we have to use two figures: one to indicate how many times we already counted to 10, and one to indicate how far we're already on our way to one more time counting to 10. Then when this second figure reaches 9, we have to use yet another figure: to indicate how many times we've counted to hundred.

Because hexadecimal uses multiplications of 16, we have to able to count to 16 using only one figure. That's where the alphabet comes in handy: after 9, hexadecimal continues with A (10), B (11), C (12), D (13), E (14), and F (15). When counting, after we reach F, we have to use a second figure to indicate how many times we've already counted to 16, and so on.

Counting to 32 in hex:

1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1A, 1B, 1C, 1D, 1E, 1F, 20

spikejones

22-03-09, 21:26

does this have anything to do with this:

http://www.tombraiderforums.com/showthread.php?t=148904

looking at things in HEX editor will help you to decipher things - but you damn well better have some inlinking of what you should be looking for. It may be a database file with specific headings indicating a new field etc.. or it may simply be HEX view of encrypted data. Hard to tell. But if you want to learn to reverse engineer things, you should learn firstly how to engineer things. to be honest, it is all beyond my understanding on how to read files in a HEX editor, unless it is a cell phone seem edit I need to do (and someone tells me the offset to alter, and what it needs to be) or else eding BREW file color codes in HEX editor. anyhow... give Dusan or gidierre a holler. One of them may have a good idea of what you are looking at. ;)

http://www.tombraiderforums.com/showthread.php?t=148904

looking at things in HEX editor will help you to decipher things - but you damn well better have some inlinking of what you should be looking for. It may be a database file with specific headings indicating a new field etc.. or it may simply be HEX view of encrypted data. Hard to tell. But if you want to learn to reverse engineer things, you should learn firstly how to engineer things. to be honest, it is all beyond my understanding on how to read files in a HEX editor, unless it is a cell phone seem edit I need to do (and someone tells me the offset to alter, and what it needs to be) or else eding BREW file color codes in HEX editor. anyhow... give Dusan or gidierre a holler. One of them may have a good idea of what you are looking at. ;)

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