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Index > DOS > Sites for math operations

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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
Ive been having trouble lately with math, is there any sites fully explaining arithmetic operations on the assembler. When and why to use cbw, stuff like that.

Sites. <- ?

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 07 Jan 2012, 06:04
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smiddy



Joined: 31 Oct 2004
Posts: 559
smiddy
Post 07 Jan 2012, 13:24
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
Cute. I know how to use div.

Let me rephrase my question to remove smart asses.



Is there a site that fully explains all forms of math in x86

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 07 Jan 2012, 20:23
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typedef



Joined: 25 Jul 2010
Posts: 2914
Location: 0x77760000
typedef
The art of assembly has everything you need to know
Post 07 Jan 2012, 20:57
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
Ok, thank you
Post 07 Jan 2012, 21:20
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typedef



Joined: 25 Jul 2010
Posts: 2914
Location: 0x77760000
typedef
smiddy wrote:
Look here!


THat's not helping dude.


Here GHost, http://flint.cs.yale.edu/cs422/doc/art-of-asm/pdf/
Post 07 Jan 2012, 23:58
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AsmGuru62



Joined: 28 Jan 2004
Posts: 1398
Location: Toronto, Canada
AsmGuru62
@GhostXoPCorp: so you looking for math, like float point math?
This site is explaining all nicely:
http://www.website.masmforum.com/tutorials/fptute/index.html
Post 08 Jan 2012, 00:48
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smiddy



Joined: 31 Oct 2004
Posts: 559
smiddy
Sorry, I must have been in a weird mood when I posted that. Smile

I like this: http://en.wikipedia.org/wiki/X86_instruction_listings

There was another site back in the day, SandPile.org or something, that had all of the instructions and some undocumented one.
Post 08 Jan 2012, 10:50
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smiddy



Joined: 31 Oct 2004
Posts: 559
smiddy
Yep, this site has a bunch of info in a decent enough format: http://www.sandpile.org/
Post 08 Jan 2012, 10:52
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GhostXoPCorp



Joined: 13 Dec 2008
Posts: 199
Location: 01F0:0100
GhostXoPCorp
Quote:
Yep, this site has a bunch of info in a decent enough format: http://www.sandpile.org


Thanks alot smiddy, That site looks fully of information, and may actually be very helpful for me. Sorry for calling you a smart ass, i may have posted it when i had just woken up, im not much for calling names as i dont think its right.

@typedef: Thank you as well, i actually downloaded every pdf a month ago jumping back into assembler. That looks alot better and more straight to the point rather than the site i was had where alot of scrolling had to be done.

@asmguru: Thank you, soon enough ill have to look into floating point math and now i know where to go

Thank you all. One side note for helping me and maybe others with debugging (it has saved me alot of questions), but i had found a assembler called emu8086 which (unlike when i last used it a year ago) now supports fasm! When will the fasm ide support single step debugging like this one ? Confused

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Oh that divide overflow. Just jumps out of the bushes every time to scare the day lights out of me.
Post 08 Jan 2012, 21:58
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