Unix SPITBOL 13.01 Released

The SPITBOL Project is pleased to announce that Unix SPITBOL 13.01 is available.

It can be downloaded from Github: HARDBOL/SPITBOL:

13.01 tar.gz

13.01 zip

This release supports floating-point arithmetic and save files. Load modules and the loading of external functions are still not supported.

About these ads

2 Comments

  1. paul
    Posted January 26, 2013 at 13:21 | Permalink

    Neat!

  2. paul
    Posted February 25, 2013 at 02:08 | Permalink

    Oh my heavens, it has a generational GC of sorts (the “sediment” described in the big GBCOL comment around line 20452 in the s.min file). An in-place, compacting, mark-sweep GC that (mostly) only touches ephemeral data in the heap, since longer-lived stuff stays in the sediment and doesn’t get scanned. I guess this has to depend on pointer fields never mutating between GC calls?

    I’m not enough of a loremeister to know whether this scheme is/was widely used in smaller Lisp implementations, but it’s pretty clever. I guess all blocks have to be of some minimal size since unmarked blocks get overwritten with some relocation pointers to tell the compaction phase where to move the marked blocks. So small integers shouldn’t go in the heap, etc.

    This is just going by the block comments. I haven’t tried understanding the MINIMAL code. I guess I should do that. I’m thinking of trying to port the algorithm for a small Lisp that I sometimes mess with, that happens to have immutable data.

    Do you know if Spitbol 360 worked the same way?


Post a Comment

Required fields are marked *
*
*

  • Pages

  • January 2013
    M T W T F S S
    « Dec   May »
     123456
    78910111213
    14151617181920
    21222324252627
    28293031  
  • RSS The Wayward Word Press

  • Recent Comments

    daveshields on SNOBOL4 for Linux
    Walter Rutherford on SNOBOL4 for Linux
    David Plummer on SNOBOL4 for Linux
    David Plummer on SNOBOL4 for Linux
    Thomas A Naegele on SNOBOL4 for Linux
  • Archives

  • Blog Stats

  • Top Posts

  • Top Rated

  • Recent Posts

  • Archives

  • Top Rated

  • %d bloggers like this: