This is the ANSI C version of LispMe. Just like LispMe, it's distributed under the GNU General Public License, which means NO WARRANTY.

It's a subset of LispMe running on the Palm, there's no graphics, user interface etc., just plain text IO (and file IO, too), so this is pretty much a bare-bones R4RS Scheme.

Further notes and differences to LispMe on the Palm:

• The files should compile with any decent C compiler on Windows and Linux. This has been tested with GNU C (Cygwin).

• The invocation syntax is LispMe * *
  where can be -h or -? display help -a set atom size -m set heap size -r set FP size sizes are integers (bytes), optionally followed by k (kilo) or M (mega) s are LispMe source files, which are loaded in the order given

• The file `.lispme.scm' is always loaded as the first file, put your standard definitions here.

• Of course you can use the file redirection modifiers of your shell: outfile 2>errfile All informational output (prompt, statistics, error messages) is output on stderr.

• Commands are entered into the REP loop by typing an exclamation mark as the very first char, followed by the command:

  :r resets LispMe's heap :q quits LispMe :m print memory statistics :n list all defined names :p pop last loaded file :l load a file (no blanks before filename!)

• Any other input is interpreted as an expression to be evaluated

• You can interrupt evaluation/printing with Ctrl-C (SIGINT), resuming the top-level REP-loop. If everything fails, you can exit LispMe with Ctrl-Break (SIGBREAK) or SIGTERM.

• For a test and an example invoke: LispMe -m 10m -r 2048 fib.scm hanoi.scm <demo.inp >demo.out 2>nul and compare the demo.out with demo.res, both files should be identical.

• Another example using macros and call/cc for backtracking: LispMe -m 10m nondet.scm europe.scm and evaluate (color-europe) to obtain a 4-color map of western/middle Europe in about 1 second on a 2.6 GHz processor or evaluate (length (bag-of (color-europe))) to get 2592 solutions in about 24 seconds.

• Executing speed seems to be about 16 million SECD steps per second on a 2.6 GHz Intel chip (no swapping). Compare this with 8000-10000 steps per second on a Palm!

• The opcodes in vm.h are NOT the same as in the PalmOS version since many Palm functions are missing and the opcodes should be contiguous.

• BTW, I'm NOT planning to extend LispMe to a general purpose Scheme system on desktop (Windows NT, MAC, Linux) platforms, since there is already a bunch of very usable Schemes for those systems.