CrackMe® Practices for Newbies ~ Moderated

Re: Re: A bit of explanation
Friday, 22-Jan-99 16:27:55
    195.232.124.3 writes:

    Pedro,

    These are all FPU instructions, because they no longer deal with straightforward ints like the eax,ebx,etc registers hold most are held in memory instead. They are in a fairly strange format to be able to hold numbers from 1*10E-99 to 1*10+E99 etc within just a few bytes. In this case a REAL8 PTR is a pointer to a memory location which contains a single precision floating point number, which takes up just 8 bytes (simple huh, but wait till you try and convert one from FP into ASCII). The best resources are : Intel http://developer.intel.com/ for the technical manuals for the pentium processor (you want the second one which gives all of the assembly language instructions). For a simple overview there is http://www.sandpile.org.

    Cronos

    Cronos


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Pedros Thread (n/t) (21-Jan-99 06:26:03)

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