Sv: Sv: Sv: A83: Random values

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Sv: Sv: Sv: A83: Random values


Ah.... That last thing sounds interesting...
the writing back thing is kinda tricky.. Wouldn't know how to do that yet - and any explanation ppl could get me would still be too technical I'm afraid... but just wait.. maybe next week I'll ask....

Thanks again for the great delay measuring trick.

-----Oprindelig meddelelse-----
Fra: Linus Akesson <lairfight@softhome.net>
Til: Thomas Turn Jensen <assembly-83@lists.ticalc.org>
Dato: 11. september 1998 20:45
Emne: Re: Sv: Sv: A83: Random values


>
>Yupp. So you can do a writeback to the program, saving the last random number
>and reading it back as the first random number when the program is run again.
>Another widely used method is to check how long time the user waits before
>pressing a key. This would involve using your own key loop, instead of
>_getkey:ing.
>
>Linus
>
>On 11-Sep-98, Thomas Turn Jensen wrote:
>
>>But if I start with a constant - wouldn't my program just come up with the
>>same random numbers everytime it is run?
>
>>This may be a stupid question, but I simply doesn't follow you.. Care to
>>explain more (plz :-)?
>
>>-----Oprindelig meddelelse-----
>>Fra: Linus Akesson <lairfight@softhome.net>
>>Til: Thomas Turn Jensen <assembly-83@lists.ticalc.org>
>>Dato: 11. september 1998 18:30
>>Emne: Re: Sv: A83: Random values
>
>
>>>
>>>You don't. Use a constant, or the contents of some register at program start
>>>or whatever. The random routines in the os always start with the same
>number,
>>>I think it is 0.94 or something the first time you use math->rand with new
>>>batteries.
>>>
>>>Linus
>>>
>>>On 10-Sep-98, Thomas Turn Jensen wrote:
>>>
>>>>Great!....
>>>>..ehm.. How do I get that Starting random # ?
>>>
>>>>-----Oprindelig meddelelse-----
>>>>Fra: Linus Akesson <lairfight@softhome.net>
>>>>Til: Thomas Turn Jensen <assembly-83@lists.ticalc.org>
>>>>Dato: 10. september 1998 21:02
>>>>Emne: Re: A83: Random values
>>>
>>>
>>>>>
>>>>>Random algorithms are quite numerous out there... one idea is to take the
>>>>>previous random number you got, rotate it some, add some, eor some, then
>>try
>>>>>the program and see if there's a visible pattern. If there is, change some
>>>of
>>>>>the constants and try again...
>>>>>
>>>>>Linus
>>>>>
>>>>>On 10-Sep-98, Thomas Turn Jensen wrote:
>>>>>>I need to get two random values...
>>>>>>one in the range [0..94] and the other in [1..64] (yes you guesed it -
>>it's
>>>>>>for the graph-screen)
>>>>>
>>>>>>I've found a function called "_Random" but have no idea what parameters
>it
>>>>>>takes where - nor what/where the output is...
>>>>>
>>>>>>Could someone either explain to me how it works or tell me how to write
>>>>>>something which results in the above mentined numbers. (If i get a
>>function
>>>>>>that results in a random byte thats ok - where I need it, speed isn't
>>>>>>essential so I can just check it and if not good generate another random
>>>>>>number)
>>>>>>In case someone gives me some code, _plz_ explain what it does as I'm
>more
>>>>>>interesting in learning how to make it rather than always use other
>>peoples
>>>>>>code.
>>>>>
>>>>>>Thank you.
>>>>>
>>>>>>***
>>>>>>Thomas Turn Jensen
>>>>>>Icq uin => 8128636
>>>>>>IRC, Undernet => Mukke
>>>>>>***
>>>>>>If your computer gives you trouble
>>>>>>Call for Mukke on the double
>>>>>>***
>>>>>
>>>>>
>>>
>>>
>>>
>>>
>
>
>
>