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- CONTENTS OF PRELIMINARY DISTRIBUTION OF RISC OS PORT OF SB-PROLOG 3.1
- ---------------------------------------------------------------
-
- (RISC OS sub-version 0.2)
-
- WARNING WARNING WARNING: Read all of this document before trying to use
- SB prolog!
-
- !sbp - An application directory for prolog system. If you have Acorn's
- Desktop development environment installed, or use RISC OS 3,
- running this should open a taskwindow running sbp (see below).
-
- sbp - Script running SB-prolog configured for general purpose use on
- 4M byte Arc.
- sbs - Script running small SB-prolog (too small to run compiler)
- suitable for 2M machines.
- sbpc - Script running SB-prolog configured with (roughly) minimum
- size memory areas large enough to compile sizeable Prolog programs.
-
- bench - Some nice benchmarks to check out SB-prologs performance
-
- MANUAL - Ascii text version of the SB-Prolog manual
-
- MANUALps - Postscript version of the SB-Prolog manual
-
- Command Line Option arguments to sbprolog
- --------------------------------------
-
- The sbprolog interpreter is invoked from the RISC OS command line with
- a command of the form
-
- sbprolog <option> ... <compiled_prolog>
-
- where <compiled_prolog> is the name of a file containing compiled SB prolog
- and <option>s are command line arguments of the form:
-
- -T generate trace at entry to each called routine
- -d generate disassemled dump compiled file given as last argument
- -n adds machine addresses to traces and or dumps
- -s Makes the interpreter take more care of maintaining the statistics printed
- out by the predicate ``statistics''.
- -m <size> Sets the extent of the Prolog stack area to <size> entries each
- entry requires 4 bytes of memory
-
- -p <size> Sets the extent of the Prolog program area to <size> entries. Each
- entry requirs 4 bytes.
-
- -b <size> Sets the size of the Prolog backtrack trail area. This is set to
- the -m value divided by 5 by default.
-
- When sbprolog runs it expects the operating system SIMPATH to contain
- search path telling it where to find the various compiled prolog libraries
- it needs to run. This is usually set by the !boot file in !sbp, but if !sbp
- is not in a directory mentioned on your Run$Path you will need to set it
- manually or open the directory containing !sbp.
-
- DIFFERENCES FROM UNIX VERSION DESCRIBED IN ``MANUAL''
- ------------------------------------------------
-
- 1. The pathnames in the search path given in by the variable SIMPATH are
- seperated by ;'s rather than :'s as in the UNIX version. This is because :'s
- frequently appear in full RISC OS pathnames.
-
- 2. Some massaging is done of the pathnames submitted to the ``load'' command.
- $'s are stripped out and the final filename in the path truncated to ensure
- it is no more than 10 characters long.
-
- These modifications are necessary to allow the SB-prolog's autoloading
- mechanism to work properly. SB-prolog uses the name of a module
- that needs to be loaded as the filename of the file that is supposed to
- define that module. Unfortunately, because under UNIX filenames can be
- very long, and may contain $'s these the writers of SB prolog used long
- module names and a convention of prefixing module names
- (and internal predicate names) with $. Changing all this in the source code
- would be a nightmare, and since all the names were unique in the first 10
- characters after the $ I decided to hack filenames instead.
-
- Thus: when building new auto-load modules it is important to ensure they
- are given names that differ in the first 10 characters (ignoring $'s) from
- any other module name.
-
- 3 New Predicates have been added.
-
- $riscos( +PathName, +Prefix, -NewName )
-
- Given a string PathName "d1.d2. ... .dn.filename" and a string Prefix this
- predicate succeeds with NewName "d1.d2. ... dn.Prefix.filename".
-
- seenall
-
- Does a ``seen'' on all files currently open for input (except for standard
- input, output, and error streams). Useful for closing files left open
- after an error during consultation / compilation. RISC OS, remember,
- locks out any modification of open files.
-
- toplev
-
- Does the same as ``seenall,abort''. Useful for dropping back to the
- level 0 command prompt after interrupting a compilation or consultation.
-
- If you have troubles - drop me a line (preferably by email!)
-
- Andrew Stevens
- 18 King's Meadow
- Overton
- Hampshire
- RG25 3HP
- Great Britain
-
- Andrew.Stevens@prg.oxford.ac.uk
-