[HN Gopher] Pi number calculator in 146 bytes of 8088 machine code
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       Pi number calculator in 146 bytes of 8088 machine code
        
       Author : nanochess
       Score  : 72 points
       Date   : 2022-12-12 03:44 UTC (1 days ago)
        
 (HTM) web link (github.com)
 (TXT) w3m dump (github.com)
        
       | anta40 wrote:
       | The author has other interesting bootable games, like:
       | 
       | - https://github.com/nanochess/Invaders (Invaders)
       | 
       | - https://github.com/nanochess/bricks (bricks and paddle)
       | 
       | - https://github.com/nanochess/bootRogue (Rogue)
       | 
       | If you like learning assembly language/OSDev, his repos are a
       | must to be bookmarked.
        
       | Tepix wrote:
       | Impressive!
       | 
       | It fills the screen with digits of pi, then stops (tried it at
       | https://copy.sh/v86/ ) - is it supposed to scroll?
        
         | Karellen wrote:
         | According to comments in the .asm file                   It
         | will generate (14000-14)/14*2 digits.         Cannot go further
         | with current precision
         | 
         | Which works out to about 500 digits. Maybe it's just reached
         | its limit.
         | 
         | https://github.com/nanochess/pi/blob/master/pi.asm
        
       | Eupraxias wrote:
       | Interested parties should check out Ken Ward's excellent pi-
       | calculating javascriptural here:
       | 
       | https://www.trans4mind.com/personal_development/JavaScript/l...
        
       | Waterluvian wrote:
       | If this works on an 8088, booting directly from the boot sector,
       | how far are we to compiling it for a Game Boy (an 8080-like)
       | cartridge?
        
       | helsinkiandrew wrote:
       | The link to the c code it is based on is down but the archive is:
       | 
       | https://web.archive.org/web/20210518022312/http://www.codeco...
       | 
       | Not sure I understand how that's calculating Pi though.
        
         | nickcw wrote:
         | I think it is the Spigot algorithm for Pi
         | 
         | https://www.gavalas.dev/blog/spigot-algorithms-for-pi-in-pyt...
         | 
         | If you enjoy Pi stuff then I'd recommend the Pi Unleashed book
         | 
         | https://link.springer.com/book/10.1007/978-3-642-56735-3
         | 
         | Which has this algorithm and many more!
        
           | airstrike wrote:
           | That first link deserves its own submission. Very interesting
           | read
        
           | naikrovek wrote:
           | Simon Tatham (of PuTTY fame) has an implementation of this
           | algorithm which supports far more than just pi.
           | 
           | https://www.chiark.greenend.org.uk/~sgtatham/spigot/
        
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       (page generated 2022-12-13 23:02 UTC)