4K HP 67 Games rom attached for testing

[Ángel Martin]

Guys, there are two different approaches and both use the Time Module one way or another:

1. The SandMath implementation uses two functions, SEEDT and RNDM, and a buffer to store the seed. The seed can be entered manually or by the Time Module if the user inputs zero.
This requires a buffer to store the seed. The succesive values of RNDM are calculated using the stored seed, by means of the "popular algorithm" . The calculated RNG becomes the new seed.

2. the other implementations uses a simpler approach that only requires one function (RAND) and no buffer since there's no seed. The Time module is always used to come up with the suitable seed "on the fly" using the current time - no more, no less. This approach I have used already in the FUNSTUFF and several other modules...

I think we should use the latter approach for simplicity and as far as I can tell equivalent results.

Hope this helps, it's actually quite simple.