AS6502(5)           UNIX Programmer's Manual            AS6502(5)



NNNNNNAAAAAAMMMMMMEEEEEE
     as6502 - assembler for MOS Technology 650X microprocessors

SSSSSSYYYYYYNNNNNNOOOOOOPPPPPPSSSSSSIIIIIISSSSSS
     aaaaaassssss666666555555000000222222 [ option ] [ parameters] file ...

DDDDDDEEEEEESSSSSSCCCCCCRRRRRRIIIIIIPPPPPPTTTTTTIIIIIIOOOOOONNNNNN
     _A_s_6_5_0_2 assembles the named files and produces a listing on
     the standard output.  Available options are:

     ------iiiiii  ignore .nlst pseudo ops in the source file.

     ------llllll  produce only an error listing on the standard output.

     ------nnnnnn  print address in normal <high byte><low byte> format,
         rather than split <low byte>:<high byte> format.

     ------oooooo  generate the ASCII object file 666666555555000000222222......oooooouuuuuutttttt...... The per-line
         format of that file is:
             ;<address low byte><address high byte><data>...

     ------ssssss  print symbol table at the end of the assembly listing.

     ------mmmmmm  Causes the object file to be output in standard MOS
         Technology format.  This option implys -o.

     Parameters:
         Parameters consist of an option character followed by a
         value.  The value may follow with or without whitespace.
         All values are decimal numbers.  Available parameters
         are:

     ------tttttt  Specify the size of the symbol table.  The default is
         20000 bytes.  Values less than 1000 are not accepted.

     ------pppppp  Specify the number of lines per page. This does not
         include the heading.  The heading uses an additional 4
         lines.  The default is 60, which gives 3 blank lines
         between pages on a 66 line page (1 line at the top and 2
         lines at the bottom).  A form feed precedes the head-
         ings.  Specifying 0 for page size results in no heading
         at all.

     ------wwwwww  Specify the number of characters per line on the listing
         file.  The default is 132.  The minimum allowed is 80
         and the maximum is 133.

     Symbol conventions:
         Up to 19 alphanumeric (a-z | A-Z | 0-9 | . | _) charac-
         ters, with initial character non-numeric.

         Asterisk (*) is symbolic name of the location counter.



Printed 12/18/86            12/11/86                            1






AS6502(5)           UNIX Programmer's Manual            AS6502(5)



     Op code mnemonics (upper and/or lower case):
         ADC   BIT   BVS   CPX   INC   LDX   PHP   RTI   SEI  TAY
         AND   BMI   CLC   CPY   INX   LDY   PLA   RTS   STA  TSX
         ASL   BNE   CLD   DEC   INY   LSR   PLP   SBC   STX  TXA
         BCC   BPL   CLI   DEX   JMP   NOP   ROL   SEC   STY  TXS
         BCS   BRK   CLV   DEY   JSR   ORA   ROR   SED   TAX  TYA
         BEQ   BVC   CMP   EOR   LDA   PHA

     Pseudo op mnemonics:
         =      equate label to operand value.
         *=     equate location counter to operand value.
         .WORD  assign 16 bit operand value to next 2 locations.
         .DBYT  assign 16 bit value to next 2 locations, reverse.
         .BYTE  assign 8 bit operand value to next location.
         .NLST  turn listing mode off.
         .LIST  turn listing mode on.
         .PAGE  start a new listing page.  A title enclosed in ""
         is optional.  The title must be small enough to fit in
         the heading line.

     Constant types:
         %       binary number prefix.
         @ or 0  octal number prefix.
         $       hexadecimal number prefix.
         '       ASCII character prefix.
         "       ASCII character string prefix and suffix.
         default (leading digit 1 through 9)  decimal number.

     Operand field operators:
         +     addition               ^     logical exclusive OR
         -     subtraction            ~     logical 1's comple-
         ment
         /     integer division       $     logical AND
         *     multiplication         |     logical OR
         %     modulo                 <     low byte
                                      >     high byte

FFFFFFIIIIIILLLLLLEEEEEESSSSSS
     /BIN/as6502   the assembler
     6502.out      object (with -o option)
SSSSSSEEEEEEEEEEEE AAAAAALLLLLLSSSSSSOOOOOO
     J. H. Van Ornum, "as6502 User Notes"
DDDDDDIIIIIIAAAAAAGGGGGGNNNNNNOOOOOOSSSSSSTTTTTTIIIIIICCCCCCSSSSSS
File handling diagnostics:
     Invalid argument count - as6502 invoked without a source
               file or with too many source files.
     Open error for file <name> - as6502 cannot open source file.
     Create error (6502.out) - as6502 cannot create object file.
     Close error - as6502 cannot close the source file.
     Close error (6502.out) - as6502 cannot close object file.
Assembly error diagnostics:
     Symbol table full - symbol table overflowed allotted space.



Printed 12/18/86            12/11/86                            2






AS6502(5)           UNIX Programmer's Manual            AS6502(5)



               Number of symbols is a function of symbol sizes.
     Label multiply defined - symbol defined more than once.
     Sync error - the pass 2 value of symbol in the label field
               is different than the pass 1 value.
     Invalid operation code - op code mnemonic is invalid.
     Operand field missing - the op code mnemonic requires an
               operand, and none was found.
     Invalid operand field - operand field contains an operator
               which is not recognized by as6502.
     Invalid branch address - branch instruction to a location
               which is out of range.
     Invalid addressing mode - tried to use an addressing mode
               which is not available to the operation code.
     Operand field size error - operand is larger than hex FF.
     Undefined symbol in operand field - a symbol in the operand
               field never appeared in the label field.
BBBBBBUUUUUUGGGGGGSSSSSS



































Printed 12/18/86            12/11/86                            3