    AS(I)                        1/15/73                        AS(I)

    NAME
         as - assembler

    SYNOPSIS
         as [ - ] name ...

    DESCRIPTION
         As  assembles  the concatenation of the named files.  If the
         optional first argument - is used, all undefined symbols  in
         the assembly are treated as global.

         The output of the assembly is left on the file a.out.  It is
         executable if no errors occurred during the assembly, and if
         there were no unresolved external references.

    FILES
         /lib/as2       pass 2 of the assembler
         /tmp/atm[1-3]? temporary
         a.out          object

    SEE ALSO
         ld(I), nm(I), db(I), a.out(V), `UNIX Assembler Manual'.

    DIAGNOSTICS
         When an input file cannot be read, its name  followed  by  a
         question  mark is typed and assembly ceases.  When syntactic
         or semantic errors occur, a single-character  diagnostic  is
         typed out together with the line number and the file name in
         which it occurred.  Errors in pass 1 cause  cancellation  of
         pass 2.  The possible errors are:

         )  Parentheses error
         ]  Parentheses error
         <  String not terminated properly
         *  Indirection used illegally
         .  Illegal assignment to `.'
         A  Error in address
         B  Branch instruction is odd or too remote
         E  Error in expression
         F  Error in local (`f' or `b') type symbol
         G  Garbage (unknown) character
         I  End of file inside an if
         M  Multiply defined symbol as label
         O  Word quantity assembled at odd address
         P  `.' different in pass 1 and 2
         R  Relocation error
         U  Undefined symbol
         X  Syntax error

    BUGS
         Symbol  table  overflow  is not checked.  x errors can cause
         incorrect line numbers in following diagnostics.

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