.\" dummy line
.TH MRED 1 "8 June 1996"
.UC 4
.SH NAME
mred \- The Rice PLT GUI engine
.SH SYNOPSIS
.B mred
[-s
.I sysfile
]
[-q | --no-init-file]
[-f
.I file
]
[-e
.I expr
]
[--
.I arguments
]
.SH DESCRIPTION
.I MrEd
is Rice University's Programming Languages Group's GUI
execution engine.
.I MrEd
runs on a variety of platforms.
.PP
The -s flag directs
.I MrEd
to load the startup system from
a particular file. This overrides the system directory
search path described below in FILES.
.PP
The -q or --no-init-file flag prevents MrEd from loading
the user's startup file ".mredrc" in the user's home
directory.
.PP
After the -s and -q or --no-init-file flags, multiple -f
and -e flags can be specified. For each -e flag, the corresponding
expression is evaluated. For each -f flag, the corresponding file
is loaded (with its directory as the working cirectory).
.PP
Other arguments before the -- flag are ignored. Once all
flags are handled or the -- flag is encountered, the scheme procedure
mred:startup is called. This procedure is defined by the standard
system, but it can be redefined with the -f or -e flags for
application-specific startup sequences. 
.PP
For further information on
.I MrEd,
please consult the on-line
documentation and other information available at
.PP
.ce 1
http://www.cs.rice.edu/CS/PLT/packages/mred/
.SH FILES
If the -s flag is not specified, 
.I MrEd
looks for its standard system file "mrsystem.ss" with the following 
search path:
.IP
* the current working directory
.IP
* the search path defined by the MREDSYS system evironment 
variable
.IP
* the "system" sub-directory in the current working directory
.IP
* "PLTHOME/mred/system" directory, where "PLTHOME" is replaced
with value of the PLTHOME environment variable
.IP
* "/usr/local/lib/plt/mred/system"
.IP
* "/usr/lib/plt/mred/system"
.IP
* "/usr/local/lib/mred/system"
.IP
* "/usr/lib/mred/system"
.PP

The standard system loads in the core or the mzlib library,
using the following search path:
.IP
* "../mzlib"
.IP
* "../mzscheme/mzlib"
.IP
* "../../mzscheme/mzlib"
.IP
* "PLTHOME/mzscheme/mzlib", where "PLTHOME" is replaced
with the value of the PLTHOME environment variable. 
If the environment variable is undefined, 
"/usr/local/lib/plt/home" is used
.PP
Please consult your local administrator to determine whether
the on-line documentation has been installed locally.
.SH BUGS
Email bug reports to plt-bugs@cs.rice.edu.  Please mention
"MrEd" in the subject line or the message.
.SH AUTHOR
.I MrEd
was implemented by Matthew Flatt (mflatt@cs.rice.edu)
using wxWindows by Julian Smart et al. and
the conservative garbage collector by Hans Boehm et al.
.SH SEE ALSO
.BR drscheme(1),
.BR mzscheme(1)