It also appears to be quite portable. I don't know if it was ever
intended to be used in the MS-DOS environment, but I got it running
more or less "out of the box". Borland C 3.1 compiled all the files
fine. There was a warning for some files: "Undefined structure 'hash'"
which I corrected by including hash.h in the pertinent files. The test
program executed all but one of the sample scripts correctly. Frankly,
I was amazed and delighted.

However, the script long.lua failed spectacularly crashing the DOS
session I was running under Windoze. This script creates an array of
5000 descending integers by adding them one at a time, selection sorts
them into ascending order and prints the 512th element.  Using Bounds
Checker to screen memory accesses I discovered that the fault occurred
when a vector node occupying more than 64k bytes memory was created
and initialised (in hashnodecreate).  Of course, this was the old
segmented memory problem: pointers in the large memory model wrap
round at 64k.  Recompiling using the huge memory model didn't work --
I think pointers have to be declared as 'huge' too.

I'd love to be able to use Lua in my DOS programs, so if anyone can
think of a simple solution to this I would be extremely grateful.

Francis