4K HP 67 Games rom attached for testing

[Gene]

The RAND or RNDM (I think I've seen it spelled both ways in different modules) function is used in Angel's Sandmath rom. Taken from his manual:



"It’s a little known fact that the SandMath module also uses a buffer to store the current seedUU used for random number generation. The buffer id# is 9, and it is automatically created by SEEDT or RAND the first time any of them is executed; and subsequently upon start-up by the Module during the initialization steps using the polling points.

SEEDT will take the fractional part of the number in X as seed for RNG, storing it into the buffer. If x=0 then a new seed will taken using the Time Module – really the only real random source within the complete system.

RAND will compute a RNG using the current seed, using the same popular algorithm described in the PPC ROM - and incidentally also used in the CCD module’s function RNG."