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alternative_20pseudo-random_20numbers
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alternative_20pseudo-random_20numbers [2018/03/31 13:19] 127.0.0.1 external edit |
alternative_20pseudo-random_20numbers [2018/04/17 15:05] (current) tbest3112 Added syntax highlighting |
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| \\ The following routine generates a 32-bit pseudo-random number when called, the pseudo-random number is returned in the **eax** register:\\ \\ | \\ The following routine generates a 32-bit pseudo-random number when called, the pseudo-random number is returned in the **eax** register:\\ \\ | ||
| .seed dd 1 :dd 0 | .seed dd 1 :dd 0 | ||
| + | | ||
| .Rand | .Rand | ||
| mov eax, &4C957F2D ; | | mov eax, &4C957F2D ; | | ||
| Line 75: | Line 75: | ||
| ===== Calling the pseudo-random number generator from BASIC ===== | ===== Calling the pseudo-random number generator from BASIC ===== | ||
| \\ These routines may be called from BASIC, instead of using the **RND** function, if you //really// want to:\\ \\ | \\ These routines may be called from BASIC, instead of using the **RND** function, if you //really// want to:\\ \\ | ||
| + | <code bb4w> | ||
| result% = USR Rand :REM Return a pseudo-random number in result% | result% = USR Rand :REM Return a pseudo-random number in result% | ||
| SYS RandFloat, ^N# :REM Return a pseudo-random float in N# | SYS RandFloat, ^N# :REM Return a pseudo-random float in N# | ||
| SYS RandRange, N TO result% :REM Return a range limited pseudo-random number in result% | SYS RandRange, N TO result% :REM Return a range limited pseudo-random number in result% | ||
| SYS RandSeed, TIME, TIME :REM Seed the pseudo-random generator using TIME | SYS RandSeed, TIME, TIME :REM Seed the pseudo-random generator using TIME | ||
| + | </code> | ||
| \\ | \\ | ||
| ===== References ===== | ===== References ===== | ||
| \\ The multiplier [[http://www.google.co.uk/search?q=6364136223846793005|6364136223846793005]] was obtained from Knuth, D.E., [[http://www.amazon.co.uk/gp/product/0201896842/302-0106311-7812866|"The Art of Computer Programming," Vol 2, Seminumerical Algorithms]], Third edition, Addison-Wesley, 1998, p. 106 (line 26) & p. 108. | \\ The multiplier [[http://www.google.co.uk/search?q=6364136223846793005|6364136223846793005]] was obtained from Knuth, D.E., [[http://www.amazon.co.uk/gp/product/0201896842/302-0106311-7812866|"The Art of Computer Programming," Vol 2, Seminumerical Algorithms]], Third edition, Addison-Wesley, 1998, p. 106 (line 26) & p. 108. | ||
alternative_20pseudo-random_20numbers.txt ยท Last modified: 2018/04/17 15:05 by tbest3112
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