Differences

This shows you the differences between two versions of the page.

--- tops-20 [2020/05/06 23:03]
smj
+++ tops-20 [2020/05/06 23:39]
smj
@@ Line 33: / Line 33: @@
 **PROGRAMMING EXAMPLES USING "COMPILE", "LOAD" and "SAVE" COMMANDS**
-TOPS-20 supports many programming languages using a standard COMPILE/LOAD/SAVE model.  Here are few simple examples to get started:
+TOPS-20 supports many programming languages using a standard COMPILE/LOAD/SAVE model.  TOPS-20 is very helpful using command recognition and DWIM (Do What I Mean) without having to completely type out everything.  Here are few simple examples to get started:
 **FORTRAN-77**
-      @copy TTY: test.for
+//NOTE: This formatting is punched card style - The first 5 and 6th columns are special//
+      @copy TTY: test.for                             ;A simple way to enter in TEXT from the terminal
        TTY: => TEST.FOR.1
+               PROGRAM TEST                           ;Declare the name of the program
+               WRITE (5, 10)                          ;OUTPUT to the terminal (UNIT 5) at line 10
+       FORMAT(' TESTING 1 2 3!')              ;FORMAT the text for OUTPUT
+               END                                    ;END the program
+      ^Z                                              ;CTRL-Z closes the file
+      @type test.for                                  ;TYPE the test.for file and verify
                PROGRAM TEST
                WRITE (5, 10)
        FORMAT(' TESTING 1 2 3!')
-      	       END
+               END
-      ^Z
+      @compile test                                   ;COMPILE the file TEST
-      @type test.for
+      FORTRAN: TEST                                   ;COMPILE determined TEST is a FORTRAN program
-      PROGRAM TEST
+      TEST  	                                      ;TEST is now written out as a .REL file
+      @load test                                      ;LOAD the file (or EXECUTE TEST to LOAD and RUN)
-      	WRITE (5, 10)
-	FORMAT(' TESTING 1 2 3!')
-      	END
-      @compile test
-      FORTRAN: TEST
-      TEST
-      @load test
       LINK:	Loading
-      @save test
+      @save test                                      ;SAVE the loaded program to a .EXE file
        TEST.EXE.1 Saved
       @v test.*
          LS:<SMJ.FORTRAN>
        TEST.EXE.1;P775200         6 3072(36)    6-May-2020 15:42:13 SMJ
          .FOR.1;P775200           1 71(7)       6-May-2020 15:41:09 SMJ
          .REL.1;P775200           1 93(36)      6-May-2020 15:41:46 SMJ
        Total of 8 pages in 3 files
+       @<smj.fortran>test                             ;Run the .EXE file
+       TESTING 1 2 3!
+       CPU time 0.09   Elapsed time 0.19
+For an excellent summary to get started with FORTRAN on TOPS-20, check out
+[[http://wiki.twenex.org/doku.php?id=tutorials:fortran]]
+**MACRO-20**
+MACRO is the assembler on TOPS-20.  Here is a simple example of a Hello World in MACRO
+       @COPY TTY:hello.mac                             ;A simple way to enter text into a file
+       title hello
+       entry output
+       search uuosym
+       hello:	asciz /Hello there.
+       /
+       output:	outstr hello
+       	monrt.
+       	end output
+       ^Z
+       @type hello.mac
+       title hello
+       entry output
+       search uuosym
+       hello:	asciz /Hello there.
+       /
+       output:	outstr hello
+       	monrt.
+       	end output
+       compile hello
+       MACRO:	hello
+       EXIT
+       @load hello
+       LINK:	Loading
+       @save hello
+        HELLO.EXE.1 Saved
+       @<smj>hello
+       Hello there.

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