[A83] Re: Random numbers
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[A83] Re: Random numbers
If you enabled APD,
>The r register has only *7* signifcant bits, so numbers from 0 to 127.
>
>
>>From: Peter-Martijn Kuipers <hyper@hysoft-automation.com>
>>Reply-To: assembly-83@lists.ticalc.org
>>To: assembly-83@lists.ticalc.org
>>Subject: [A83] Re: Random numbers
>>Date: Fri, 10 Aug 2001 15:06:46 +0200 (CEST)
>>
>>
>>Depends on what you need, if you only need an 8-byte integer, you can use
"apdSubTimer EQU 8448h" (from Ti83plus.inc). I tried it and it
works great. In CalcSys the main apdtimer seems to be always 74h.
>>the 'r' register, which is normally (not in the 83(+,SE)) used for dynamic
>>memory refresh, but contains a pseudo-random number based on the amount of
>>clock-cycles ran.
>>you can use it only with ld a,r and ld r,a (no use in the latter)
>>if you have a fixed number of clock-cycles between each read (if you don't
>>wait for user input or let a wait routine depend on an arbitrary changing
>>mem address), though, you will have the same difference between the reads.
>>
>>e.g.
>>1 - 6
>>63 - 9
>>
>>--(Peter-Martijn)
>>
>>
>> >
>> > What is the best random number generator routine , in terms of
>> > effectiveness and speed ?
>> >
>> > TruRand seems to be slow (it uses OPs), and I can't paste Joe Wing's
>> > random numbers routine (that is used in Ion and Zlib) in my program.
>> >
>> >
>> >
>> >
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>>
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