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ARTRAG
msx guru
Posts: 2175
Posted: January 20 2010, 21:53   
IIRC
they told they want to present the game to the passion msx contest.
I'm sure sooner or later they will show the rom.
Moam has eternal delays, but never the less it is still under development
wolf_

msx legend
Posts: 5166
Posted: January 20 2010, 23:35   
Quote:

*PS* How long it should take until some HUMBLE z80 coder copy & paste here some nice z80 asm code that calculates pi digits?


Simple!

1) Measure the area of a disc
2) start up an assembler, and divide the area by the squared radius of the disc!
3) result = PI

(not sure about the amount of floating point digits you get, but what the heck )
ARTRAG
msx guru
Posts: 2175
Posted: January 21 2010, 08:46   
hummm
the area need some Eulero formula... it cannot expand the digits easily

a better way is this
http://en.wikipedia.org/wiki/Buffon%27s_needle

once you implement the hitting code you can run it as many times as you like

In the end the result comes from one single division between the number of tries and teh number of hits

If you need 100 digits you have to implement one single 100 digit division




ARTRAG
msx guru
Posts: 2175
Posted: January 21 2010, 08:47   
If you do not want a method with variable precision, this is a good way

db "3,1415926535897932384626433832795"


;P
Leo
msx professional
Posts: 759
Posted: January 21 2010, 13:39   
There is a debate over who "invented" or found PI , because before greeks , ancientegyptian were using the 22/7 ratio , which is fairly a good approx.

konamiman
msx freak
Posts: 236
Posted: January 21 2010, 13:55   
Quote:

*PS* How long it should take until some HUMBLE z80 coder copy & paste here some nice z80 asm code that calculates pi digits?


Z80 asm? Why? BASIC is enough for that:
PRINT ATN(1)*4

Please send me the math nobel prize by email. Thanks.
bore
msx novice
Posts: 18
Posted: January 21 2010, 14:46   
There is no nobel prize for math...
FiXato
msx addict
Posts: 454
Posted: January 21 2010, 14:47   
Just a Nobel prize for War Peace

I still wonder if poor Alfred would be proud of the latest awards..
ARTRAG
msx guru
Posts: 2175
Posted: January 21 2010, 15:37   
Quote:

Quote:

*PS* How long it should take until some HUMBLE z80 coder copy & paste here some nice z80 asm code that calculates pi digits?


Z80 asm? Why? BASIC is enough for that:
PRINT ATN(1)*4

Please send me the math nobel prize by email. Thanks.



hummm
My solution can have more digits than basic variables (just rip off them from some table)
:-)


anyway this is another way to approx PI: do 355/113
it is a very accurate value, differing from PI by no more than 3×10−7
;-)



NYYRIKKI
msx master
Posts: 1774
Posted: January 22 2010, 03:21   
I would suggest using table...

http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html

If you scroll down and follow the links you also find different ways of calculating pi... How ever I must say that calculating pi is not something MSX is very good for.
RibbSayan
msx novice
Posts: 23
Posted: January 22 2010, 16:52   
PI Calculation is very interesting (no joke) but I post back my question :
Do you release your tools ? Because, I'm VERY interested on this...
 
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