Re: Sv: Sv: Sv: A83: Random values

[Prev][Next][Index][Thread]

Re: Sv: Sv: Sv: A83: Random values


It'll work as long as you squish it.. What good game isn't squished
anyway?

On Sat, 12 Sep 1998 10:50:43 +0100 Linus Akesson <lairfight@softhome.net>
writes:
>
>That will only work when the program is run through a shell. Besides, 
>you
>can't do ex a,e.
>
>Linus
>
>On 11-Sep-98, Phelan Wolf wrote:
>
>>ok, writeback isn't hard.
>>make a label at the end of your program, like this:
>
>>lastRandom:
>
>>and allocate it 1 byte like this:
>
>>lastRandom: .db $00
>
>>now we have where we place the random number.  We do it like so...
>
>>;code getting random number into 'e'
>>ld hl,lastRandom     ;get ready to copy the random number
>>ex a,e               ;exchange 'a' and 'e', putting the random number 
>       
>
>>            
>>;from 'e' into 'a', while not destroying 'a'
>>ld (hl),a            ;(hl) is the memory location, lastRandom, and 
>we
>>                     ;just put the random number into there
>>ex a,e               ;restore the registors 'a' and 'e' by putting    
>       
>
>>         
>>;back the origional values
>
>>hope this helps, any questions just ask.
>
>>-Phelan 'Amen' Wolf
>
>
>>>From owner-assembly-83-outgoing@towerguard.unix.edu.sollentuna.se 
>Fri 
>>Sep 11 11:48:46 1998
>>>Delivered-To: 
>assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
>>>Received: by towerguard.unix.edu.sollentuna.se (VMailer, from userid 
>
>>507)
>>>id 44099C60AF; Fri, 11 Sep 1998 20:48:31 +0200 (CEST)
>>>Message-ID: <000701bdddb4$f98a8ae0$bcc752c3@turn>
>>>From: "Thomas Turn Jensen" <Mukke@get2net.dk>
>>>To: <assembly-83@lists.ticalc.org>
>>>Subject: Sv: Sv: Sv: A83: Random values
>>>Date: Fri, 11 Sep 1998 20:49:55 +0200
>>>MIME-Version: 1.0
>>>Content-Type: text/plain;
>>>charset="iso-8859-1"
>>>X-Priority: 3
>>>X-MSMail-Priority: Normal
>>>X-Mailer: Microsoft Outlook Express 4.72.3110.5
>>>X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3
>>>Content-Transfer-Encoding: 8bit
>>>X-MIME-Autoconverted: from quoted-printable to 8bit by 
>>towerguard.unix.edu.sollentuna.se id UAA20933
>>>Sender: owner-assembly-83@lists.ticalc.org
>>>Precedence: list
>>>Reply-To: assembly-83@lists.ticalc.org
>>>Errors-To: assembly-83-errors@lists.ticalc.org
>>>
>>>
>>>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
>>>>>>>>>***
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>
>
>>______________________________________________________
>>Get Your Private, Free Email at http://www.hotmail.com
>
>
>

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]
Follow-Ups: