File	Date	Author	Commit
validate	2025-09-29	Daniel Weaver	[94d2fd] Initial checkin.
COPYING	2025-09-29	Daniel Weaver	[94d2fd] Initial checkin.
README	2025-09-29	Daniel Weaver	[94d2fd] Initial checkin.
XPL-OPT.TXT	2025-09-28	Daniel Weaver	[11b6ae] Turn off listing and turn off dump.
XPL-PLI.PLI	2025-07-31	Daniel Weaver	[b063ac] Initial check-in
backup	2025-09-28	Daniel Weaver	[8ecc34] Version 4.1
change.log	2025-09-29	Daniel Weaver	[94d2fd] Initial checkin.
makefile	2025-09-28	Daniel Weaver	[564b17] Add a release target.
xcom.xpl	2025-09-29	Daniel Weaver	[ba6e9f] Add another ooptimization to the devide code.
xplib.xpl	2025-08-23	Daniel Weaver	[01d43a] Fix a bug where strings might get corrupted if ...

Read Me

XPL compiler for the IBM 360.

XPL is a dialect of PL/1 that was created by William M. McKeeman,
James J. Horning and David B. Wortman and is described in their
book "A Compiler Generator".  Robin A. Vowels took this compiler and
added optimizations.  Daniel Weaver did validation and bug correction.

This compiler requires an IBM 360 simulator to run.  You can find one here:
  https://sourceforge.net/projects/suny-pascal/
The IBM 360 simulator in the Pascal project also emulates the XPL runtime
monitor.  After building the Pascal project you can move the file "sim360"
to this area or change the makefile to point to the simulator.

This project does not include the source code for the XPL sub monitor
which would be needed to run under the Hercules emulator.

Description of files in this distribution:

XPL-OPT.TXT  The original source file from Robin Vowels.
XPL-PLI.PLI  This same compiler translated to PL/1.
backup       A backup version of the XPL compiler executable.
makefile     Makefile for GNU Make to be run on Linux or an Apple MAC.
xcom.xpl     Compiler source with bug corrections.
xplib.xpl    Source for the Compactify procedure.

Report bugs to shoefoot@gmail.com