2.1.1	LINK-80 Command Strings
	------- ------- -------

To run LINK-80, type L80 followed by a carriage return.  Link-80 will return
the prompt "*" indicating that it is ready to accept commands.	Each command
to LINK-80 consists of a string of filenames and switches, separated by
commas.

objdev1:filename.ext/switch1,objdev2:filename.ext/s,....

If the input device for a file is omitted, the default is the currently
logged disk.  If the extension of a file is omitted, the default is .REL.
After each line is typed, LINK will load or search (see /S below) the
specified files.  After LINK finishes this process, it will list all symbols
that remained undefined followed by an asterisk.

	Example:

	*TESTPROG

	 DATA	0100	0200

	 LABEL1 	(label1 is undefined)

	 DATA	0100	0300

	*LABEL1
	*/G		(starts execution - see below)

Typically, to execute a FORTRAN and/or COBOL program subroutines, the user
types the list of filenames followed by /G (begin execution).  Before
execution begins, LINK-80 will always search the system library (FORLIB.REL
or COBLIB.REL) to satisfy any unresolved external references.  If the user 
wishes to first search libraries of his own, he should append the filenames
that are followed by /S to the end of the loader command string.

2.1.2	LINK-80 Switches
	------- --------

A number of switches may be given in the LINK-80 command string to specify
actions affecting the loading process.	Each switch must be preceded by
a slash (/).  These switches are:

SWITCH		ACTION
------		------
R		Reset.	Put loader back in its initial state.  Use /R if
		loaded the wrong file by mistake and want to restart.
		/R takes effect as soon as it is encountered in a command
		string.

E or E:Name	Exit LINK-80 and return to the Operating System.  The system
		library will be searched on the current disk to satisfy any
		existing undefined globals.  The optional form E:Name (where
		Name is a global symbol previously defined in one of the
		modules) uses Name for the start address of the program.
		Use /E to load a program and exit back to the monitor.

G or G:Name	Start execution of the program as soon as the current command
		line has been interpreted.  The system library will be searched
		on the current disk to resolve existing undefined globals
		(external references) if they exist.  Before execution begins,
		LINK-80 prints three numbers and a BEGIN EXECUTION message.
		The three numbers are the start address, the address of the
		next available byte, and the number of 256-byte pages used.
		The optional form G:Name (as with /E above) uses Name for
		the start address of the program.

N		If a FILENAME/N is specified, the program will be saved on disk
		under the selected name (with a default extension of .COM for
		CP/M) when a /E or /G is done.	A jump to the start of the
		program is inserted if needed so the program can run properly 
		(at 100H for CP/M).

P and D 	/P and /D allow the origin(s) to be set for the NEXT program
		loaded.  /P and /D take effect when seen (not deferred), and
		they have NO effect on programs already loaded.  The form is
		P:ADDRESS> or /D:ADDRESS>, where ADDRESS> is the desired
		origin in the current typeout radix.  (Default radix for
		non-MITS versions is hex.  /O sets radix to octal; /H for hex.)
		LINK-80 does a default /P:LINK origin>+3 (i.e., 103H for CP/M
		and 4003H for ISIS) to leave room for the jump to the start
		address.

		NOTE: Do not use /P or /D to load programs or data into the
		locations of the loader's jump to the start address (100h to
		102h for CP/M and 2800h to 2802h for DTC), unless it is to 
		load the start of the program there.  If programs or data are
		loaded into these locations, the jump will not be generated.

		If no /D is given, data areas are loaded before program areas
		for each module.  If a /D is given, all Data and Common areas
		are loaded starting at the data origin and the program area
		at the program origin.
		Example:
		-------

		*/P:200,F00
		Data	200	300
		*/R
		*/P:200 /D:400,F00
		Data	400	480
		Program 200	280


U		List the origin and end of the program and data area and all
		undefined globals as soon as the current command line has been
		interpreted.  The program information is only printed if a /D
		has been done.	Otherwise, the program is stored in the data
		area.

M		List the origin and end of the program and data area, all
		defined globals and their values, and all undefined globals
		followed by an asterisk.  The program information is only
		printed if a /D has been done.	Otherwise, the program is
		stored in the data area.

S		Search the filename immediately preceding the /S in the
		command line to satisfy any undefined globals.

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