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- 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.
-
- END OF FILE
- S Search the fi