## ASxxxx Release Notes

####

    Summary  of changes/additions to the ASxxxx Assemblers
    from version 6.10.

####

                    ASxxxx/ASlink version 6.1
                       Is An Update Release

    2026_07_31 Version 6.1

       This is a complete release version
       of the ASxxxx assemblers and linker.

       A complete release was selected as there are numerous changes
    made to many batch files and updates to  internal  documentation
    of source files.

                      N E W   A S S E M B L E R S

       Two new assemblers, as370 and asolms40, have been implemented
    for the Texas Instruments TMS370  series  and  the  OKI  OLMS-40
    series of microprocessors.

       A  tutorial,  "Step By Step To Creating An ASxxxx Assembler",
    can be viewed through the HTML documentation or by the PDF  file
    "StepByStep.pdf"  found in the asxhtml directory.  This tutorial
    details the process used to create the as370 and asolms40 assem-
    blers  and provides a general template for creating a new assem-
    bler.

                   ASxxxx/ASlink version 6.0
                      Is A Major Release

    2026_05_31 Version 6.0

      This is a complete release version
      of the ASxxxx assemblers and linker.

                     I N T E R N A L   C H A N G E S

      The internal calling convention for expression evaluation has
    been changed from

      expr(struct expr *esp, 0);

        to

      expr(struct expr *esp);

      The second parameter, the priority, has been removed as it is
    always 0 when called from the machine dependant portion  of  the
    assembler coding.  Currently the only exception is in pdp11mch.c
    where  a  non  zero  priority  is  required  and  the   function
    exprx(struct expr *esp, priority);  is called.

      The  second,  and more consequential, change to the assembler
    involves  the  evaluation  of  complex  relocatable   arguments.
    ASxxxx versions prior to 6 allowed only these argument options:

         1)      a local  constant
         2)      a local  label
         3)      a local  label +/- a constant
         4)      a global constant
         5)      a global label
         6)      a global label +/- a constant

      ASxxxx version 6 supports any valid arithmetic or logical ex-
    pression containing local and/or global labels and/or constants.

      The  valid operations are all those natively supported by the
    assembler.  The following examples are now legal arguments where
    la, lb, and lc are local values or labels and xa, xb, and xc are
    external global values or labels:

           .word   xa & 0x03, la * (lb | xb)
           .word   xa * xc + lc, xb * (xa + la)

      or in an instruction

    entry: jmp     entry + xa + xb
           mv      dst,#0x10 * xa

      When the assembler detects these types of expressions the ex-
    pression is passed to the linker where  all  the  symbol  values
    have been resolved and the expression can be evaluated.

      Any  machine  dependent  coding using the function expr() re-
    quires no changes as the inplementation  is  entirely  contained
    within the ASxxxx core and ASlink.

                     N E W   A S S E M B L E R

      A   new  assembler,  asst9,  has  been  implemented  for  the
    STMicroelectronics ST9 microprocessor.

                   ASxxxx/ASlink version 5.50.5 is
             a combined 1-4 release and updated version.

    2026_01_31 Version 5.50.5

      This is a complete release version
      of the ASxxxx assemblers and linker.

      1) This version combines updates 1 - 4.

      2) All file names have been made lower case.

      3) The asz80 assembler has added support for
         the Z80N (ZX Spectrum Next CPU).

      4) A new assembler, astlcs90, supports the
         Toshiba TLCS90 series of CPUs.

      5) The text and html documentation has been
         updated to include the asz80 changes and
         tha addition of the astlcs90 assembler.

    2025_08_26 Version 5.5 Update 4

    WARNING
      This update will replace ALL source code
      files for the ASxxxx assemblers and linker.
      You must save and then reapply any changes
      you may have made to the source code files.

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

      1) All functions have been changed from
         the older K&R (Kernighan & Ritchie)
         style definition:

           func(i)
           int i;

         to the

           func(int i);

         style.

      2) The function definition change has made
         the code incompatable with the original
         'DECUS C' K&R format.  All conditional
         DECUS compiling options have been removed.

      3) After rebuilding the assemblers and linker
         the reported version will be V5.50.4

    2024_10_28 Version 5.5 Update 3

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

      1) Added the 'wit' instruction, short for wait,
         which has the same opcode as the 'slw' instruction,
         short for slow.

      2) Added the 'fst' instruction, short for fast,
         which has the same opcode as the 'div' instruction,
         short for divide.

      Only one of the instructions in each pair,
      wit/slw or fst/div, can be present in any specific
      version of a 740 series processor.

      You must recompile the AS740
      assembler to incorporate the update.

    ----------

      An alternate fix is to add the
      instructions using the following macros:

      for lower case -

      .macro wit
        .list (mel)
      .byte    0xC2    ; wit/slw
        .nlist (mel)
      .endm

      .macro fst
        .list (mel)
      .byte    0xE2    ; fst/div
        .nlist (mel)
      .endm

      for upper case -

      .macro WIT
        .list (mel)
      .byte    0xC2    ; WIT/SLW
        .nlist (mel)
      .endm

      .macro FST
        .list (mel)
      .byte    0xC2    ; FST/DIV
        .nlist (mel)
      .endm

      which you use by simply inserting
      wit or fst into you assembly files -

      ...    other code
      wit
      ...    other code

      which will then assemble as

      ...    other code
      .byte    0xC2    ; wit/slw
      ...    other code

    2024_09_30 Version 5.50 Update 2

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

      1) push and pop registers (r0-r7) in as8051 fixed.

      2) push and pop registers (r0-r7) in as8xcxxx fixed

      You must recompile the as8051 and as8xcxxx
      assemblers to incorporate the update.

    2024_04_28 Version 5.50 Update 1

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

      1) movem error in as68k assembler fixed.

      2) Added missing bls.s and beq.s mnemonics and
         added blos (sane as bls) and bhis (same as bhs)
         instructions to as68k and as68cf assemblers.

      3) Added dbhis (same as dbhs) and dblos (same
         as dbls) forms to as68k and as68cf assemblers.

      4) Added shis (same as shs) and slos( same as sls)
         forms to as68k and as68cf assemblers.

      5) Test files for the AS68K and AS68CF
         assemblers updated.

      You must recompile the AS68K and AS68CF
      assemblers to incorporate the update.

                   ASxxxx/ASlink version 5.50 is
                 considered a major release version.

                     M A J O R   C H A N G E S

    THE ASSEMBLERS

      The assembler command argument structure has changed.  Previ-
    ous versions specified that the first file of a multifile  argu-
    ment was the output file.  This has been changed:

    THE OUTPUT FILE HAS THE NAME OF THE FIRST INPUT FILE

      The output file name and/or extension can be changed by using
    the -o+ naming  option.   When  the  object  file  extension  is
    changed  from  the  default .rel then the linker input file must
    explicitly specify the extension.

      Additional 'Pass 2' scans to resolve mutilevel forward refer-
    ences are available using the -n option.

      The temporary hex radix prefix '$$' has been changed to '$@'.
    The decimal point, '.', following decimal  digits  is  now  con-
    sidered a temporary decimal radix.

      The string ascii, ascis, and asciz directives can now include
    byte values.

      The following new assembler directives have been added:

           .psharea        save and restore area contexts
           .poparea        to/from a 16 element stack

           .trace          trace insert, include, assembler
           .ntrace         files, macros, and repeat macros

           .dl and .long   create 4-byte values
           .blkl           allocate 4-byte blocks
                           (only in specific assemblers)

    THE LINKER

      The  linker command argument structure has changed.  Previous
    versions specified that the first file of a  multifile  argument
    was the output file.  This has been changed:

    THE OUTPUT FILE HAS THE NAME OF THE FIRST INPUT FILE

      The  output hex format now uses the generally accepted format
    for Intel Hex.  In addition, the default output file name and/or
    extension  for  the Intel, Motorola, or Tandy linked code can be
    changed with the extended -i+/-s+/-t+ renaming options.

      The  previous linker command line -b option, set base address
    of area, has been changed to the -a option.

      The  redefined  command  line option -b now sets the base ad-
    dress of a bank.

     Given:
           .area   A       (bank=BankA)
           .bank   BankA   (base=0x100)

           .area   B       (bank=BankB)
           .bank   BankB   (base=0x200)

     Then:
       -a A=0x1000
                   sets the start address of area A to 0x1000
                   (this overrides any bank calculated address)

       -b BankB=0x4000
                   sets the start address of BankB to 0x4000
                   (this overrides any defined base address)

      Version  5.5  consolidates  all the updates since version 5.4
    which includes the addition of nine assemblers:

           AS4040          (supports the 4004)
           AS68CF          (ColdFire)
           AS68K           (68000, 68008, 68010, and 68020)
           ASCOP4
           ASCOP8
           ASEZ8
           ASPDP11         (with EIS, FIS, FPP, and CIS)
           ASRS08          (reduced version of the HCS08)
           ASSX

      A much updated ASGB assembler is now more compatible with the
    instruction syntax found in the SDCC Gameboy assembler.

      The  internals  of  the AS6500 assembler have been updated to
    use  core  functionality  unavailable  when  the  assembler  was
    originally written.

    2022_01_17 Version 5.40 Update 5

      UPDATE_02, UPDATE_03, AND UPDATE_04
      MUST BE INSTALLED BEFORE INSTALLING THIS UPDATE.

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

        1) Addressing mode errors fixed in the
           AS78K0 and AS78K0S assemblers.

        2) Test files for the AS78K0 and AS78K0S
           assemblers are updated.

      You must recompile the AS78K0 and AS78K0S
      assemblers to incorporate the update.

    2021_12_16 Version 5.40 Update 4

      This update brings the assembler and linker to version 5.44
      There is NO version 5.43

      UPDATE_02 MUST BE INSTALLED AND
      UPDATE_03 MUST BE INSTALLED BEFORE INSTALLING THIS UPDATE.

      An update is performed by merging the update directories
      with the asxv5pxx directories.  New files will be added
      and changed files will be replaced.

        1) New Assembler: ASRS08 supports the Freescale/NXP
                          RS08 series of microprocessors.

        2) Updates to build files.

        3) Documentation updated.

      You must recompile the ASxxxx Assemblers and Linker
    to incorporate the update.xxx

    2021_10_25 Version 5.40 Update 3

      This update brings the assembler and linker to version 5.42

      UPDATE_02 MUST BE INSTALLED BEFORE INSTALLING THIS UPDATE.

        2) Assembler and Linker errors are now reported in a
           more consistent manner.

        2) Assembler and Linker exit codes have been updated.

        3) Corrected the handling of the -h option in aslink.

        4) Fix the ascop8 test file tcop8.asm

        5) Miscellaneous build and cleanup file corrections

      Assembler and Linker files modified:

      assemblers:
        asdata.c, asmain.c, asout.c, assym.c, and asxxxx.h

      aslink:
        lkarea.c, lkbank.c, kkeval.c, lkhead.c, lklex.c, lklibr.c,
        lkmain.c, lkroc.c, lkrloc3.c, lkrloc4.c, lksym.c, and
    aslink.h

      You must recompile the ASxxxx Assemblers and Linker
    to incorporate the update.xxx

    2021_09_01 Version 5.40 Update 2

      This update brings the assembler and linker to version 5.41

      Includes: 2021_05_11 Version 5.40 Update 1

      and the following:

      assemblers:
        asmain    - 'cnt' variable changed to 'a_uint' type.
        asxxxx.h  - Version 5.41

      aslink:
        lklist.c  - linking errors now reported in .rst file
        lkrloc4.c - corrected problem in reported error location
        lkrloc3.c - "
        aslink.h  - Version 5.41

      as8x300:
        s8xmch.c  - line 351 changed to
                    if ((v2 == 0x07) | (v2 == 0x0F)) {

      New Assemblers:
        as4040    - Intel 4040 and 4004
        ascop4    - National Semiconductor COP400 Series Of
    Microprocessors
        ascop8    - National Semiconductor COP800 Series Of
    Microprocessors

      Updates to build/make files, assembler test files, and do-
    cumentation.

    2021_05_11 Version 5.40 Update 1

      AS78K0 and AS78K0S -

      Instructions CMP, XOR, AND, OR, ADD, SUB, ADDC, SUBC, and XCH
      with register to register operations of the form Rn,Rn
      failed to report an error if one of the arguments was not A.

      Instruction MOVW with an addressing mode of SADDRP failed to
      report an ODD address as an error.

        Note: An externally defined SADDRP address which is ODD
              will not be reported as an error by the assembler
              or the linker.

                   Asxxxx/ASlink version 5.40 is
                 considered a major release version.

    March 2021 Version 5.40

      (1)  Added a new assembler:
           AS89LP, which supports the AT89LP series of
           advanced 8051 clones with extensions.
           SFR files and a Macro Library are included.

      (2)  A rewrite of the AS6816 assembler to provide
           full 20 bit addressing and fixes to the code
           generation.

      (3)  ASZ80 assembler has been updated to support the
           8085 and 8080 using the Z80 syntax.

      (4)  AS8085 assembler has been updated to support
           the 8080.

      (5)  Assemblers flagging <# and ># as syntax errors
           have been fixed to be equivalent to #< and #>.

      (6)  Added the .incbin directive to allow verbatim
           inclusion of a byte stream.

      (7)  Added extended error reporting to all assemblers
           for most , , and  errors.

      (8)  Fixed bug in macro processor related to
           missing or malformed arguments.

      (9)  Update sections of code using strncpy() giving
           errors when compiled with GCC 10.2.0 (no other
           compiler flagged this code with an error).

    2019_03_10 Version 5.30 Update 1

      This  update  for  Version  5.30  of the  ASxxxx Cross
    Assemblers includes fixes for the following errors:

      (1)  The as78k0 assembler had numerous register
           'H' and 'L' errors which have been corrected.

      (2)  The linker reported the wrong version and has
           been corrected.

    January 2019 Version 5.3

      (1)  Added new assemblers:
           as78k0, as8008, as8008s, as8x300, and asz280

      (2)  General assembler updates
           added -i to insert assember lines before input files
           fixed .macro listing options
           fixes related to  errors and the -bb option
           fix the escape processing of the '\' character
           .include file location illustrations

      (3)  General linker updates
           fix library path file strings
           rewrite of .lst to .rst translation

      (4)  Assembler specific fixes
           as740
           changed 2-byte code to 1-byte code definition

           as8048
           Corrected bug in "sel" instruction in .8041 mode.

           asf2mc
           Corrected documentation for asf2mc processor types.

           aspic
           Fixed missing machine type variable definition
           Fixed 'tris' instruction

           asst8
           Included add/addw/sub/subw sp,#byte modes.
           Added the int opcode.  Cleaned up st8addr.c
           addressing mode comments and code.

    January 2017 Version 5.20

      (1)  Completed the functionality for propagating
           the boundary specifications .odd, .even, and
           .bndry processed during assembly to the linker.

      (2)  Restored the correct functionality of the
           .org directive in areas of REL type.

      (3)  Added Intel Hex legacy start address record
           type 1 as an option.

    Summary  of changes/additions to the ASxxxx Assemblers from Ver-
    sion 5.11 to Version 4.11.

    2015_06_27 Version 5.10 Update 1

      This update for Version 5.10 of the ASxxxx Cross
    Assemblers includes fixes for the following errors:

      (1)  The as6500 assembler incorrectly assembled
           cpx # and cpy # instructions.

      (2)  An error in asmain.c inhibited the listing of
           all .if.. assembly directives.

    2014_10_31 Version 5.10

      (1)  Rewrite of listing to relocated listing translation
           code in the assembler and the linker base code.
           The Assemblers now create a .lst to .rst hint file
           with the extension .hlr (when both .lst and .rel
           files are created by the assembler).

      (2)  Add as6100 assembler (Intersil IM6100 / Harris HM6100)

      (3)  Add as78k0s assembler (Renesas/NEC 78K/0S)

    2013_05_12 Version 5.00 Update 6

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers rolls up updates 1, 2, 3, 4, and 5 with fixes
    for the following:

      (1)  Fix asscmp assembler (pre-increment on fetch).

      (2)  Fix aslink error reporting for PC relative modes.

    2012_08_01 Version 5.00 Update 5

    Update_05 for the ASxxxx Assembler and Linker Version 5.00
    (use 'pkunzip -d u05500.zip' for extraction with MS-DOS)
    (use 'unzip -L -a u05500.zip' for extraction with Linux)

          See the note about merging
          this update with the
          asxv5pxx distribution.

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers rolls up updates 1, 2, 3, and 4 with the addition of
    a new assembler and fixes:

      (1)  A new cross assembler for the Fairchild
           F8 microprocessor (or Mostek 3870).

      (2)  Minor syntactical changes for ANSI C compatibility,
           fix type conversion warnings, and update the
           various build, make, and test files.

      Update 4 Items

      (1)  The AS8048 base opcode value for the JMPP
           instruction should be B3 and NOT 83.

      (2)  The AS8051 assembler calculates incorrect
           offsets when using the program counter, ".",
           as a destination in the instructions having
           a PC-Relative addressing mode.  These
           instructions include: jbc, jb, jbn, jc,
           jnc, jz, jnz, cjne, and djnz.

      Update 3 Items

      (1)  A new cross assembler for the Fairchild
           F8 microprocessor (or Mostek 3870).

      (2)  Minor syntactical changes for ANSI C compatibility,
           fix type conversion warnings, and update the
           various build, make, and test files.

      (3)  New cross assemblers for STMicroelectronics
           ST6, ST7, and STM8 microprocessors.

      (4)  An ASlink list file update error fix (-u option)
           causing some errors not to be inserted into the
           created .rst file.

      (5)  An additional ASxxxx assembler option (-v) which
           enables checking for out of range signed / unsigned
           values in symbol equates and arithmetic operations.
           This option has some ambiguities as internally the
           assemblers use unsigned arithmetic for calculations.
           (e.g. for a 2-byte machine -32768 and 32768 are both
           represented as 0x8000)

      Update 2 Items

      (1)  When using the assembler directive .end to specify
           the code entry address the assembler fails to set
           the variable .__.END. as a global.  Therefor the
           value of .__.END. is not passed to the linker and
           the start address frame is always zero.

      (2)  The linker will fail to create a start address frame
           when there is no code generated within the area/bank
           referenced by the .__.END. variable.

      Update 1 Items

      (1)  The newest versions of gcc (and perhaps other
           compilers) give warnings about missing arguments
           in the fprintf() function.  This update replaces
           fprintf(arg1, arg2) with fprintf(arg1, "%s", arg2)
           in each affected line of code.

      (2)  The newest versions of gcc (and perhaps other
           compilers) have defined 'getline' as a standard
           function in 'stdio.h'.  This conflicts with the
           function 'getline()' in the ASxxxx package.
           All references to 'getline()' have been changed
           to 'nxtline()'.

      Before merging the asxv5pxx directory and subdirectories with
    the V5.00 distribution the following files/directories must be
    deleted:

           [asxv5pxx\asf2mc8\f8mch.c
           [asxv5pxx\asf2mc8\f8adr.c

           [asxv5pxx\asf2mc8\f8pst.c
           [asxv5pxx\asf2mc8\f8.h

           [asxv5pxx\asxmak\vc6\asf2mc8]
           [asxv5pxx\asxmak\vs05\asf2mc8]

    2011_07_24 Version 5.00 Update 4

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers includes fixes for the following errors:

      (1)  The AS8048 base opcode value for the
           JMPP instruction should be B3 and NOT 83.

      (2)  The AS8051 assembler calculates incorrect
           offsets when using the program counter, ".",
           as a destination in the instructions having
           a PC-Relative addressing mode.  These
           instructions include: jbc, jb, jbn, jc,
           jnc, jz, jnz, cjne, and djnz.

    2010_10_31 Version 5.00 Update 3

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers rolls up updates 1 and 2 with the addition of
    three new assemblers and fixes:

      (1)  New cross assemblers for STMicroelectronics
           ST6, ST7, and STM8 microprocessors.

      (2)  An ASlink list file update error fix (-u option)
           causing some errors not to be inserted into the
           created .rst file.

      (3)  An additional ASxxxx assembler option (-v) which
           enables checking for out of range signed / unsigned
           values in symbol equates and arithmetic operations.
           This option has some ambiguities as internally the
           assemblers use unsigned arithmetic for calculations.
           (e.g. for a 2-byte machine -32768 and 32768 are both
           represented as 0x8000)

      Update 2 Items

      (1)  When using the assembler directive .end to specify
           the code entry address the assembler fails to set
           the variable .__.END. as a global.  Therefor the
           value of .__.END. is not passed to the linker and
           the start address frame is always zero.

      (2)  The linker will fail to create a start address frame
           when there is no code generated within the area/bank
           referenced by the .__.END. variable.

      Update 1 Items

      (1)  The newest versions of gcc (and perhaps other
           compilers) give warnings about missing arguments
           in the fprintf() function.  This update replaces
           fprintf(arg1, arg2) with fprintf(arg1, "%s", arg2)
           in each affected line of code.

      (2)  The newest versions of gcc (and perhaps other
           compilers) have defined 'getline' as a standard
           function in 'stdio.h'.  This conflicts with the
           function 'getline()' in the ASxxxx package.
           All references to 'getline()' have been changed
           to 'nxtline()'.

    2010_04_01 Version 5.00 Update 2

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers includes fixes for the following errors:

      (1)  When using the assembler directive .end to specify
           the code entry address the assembler fails to set
           the variable .__.END. as a global.  Therefor the
           value of .__.END. is not passed to the linker and
           the start address frame is always zero.

      (2)  The linker will fail to create a start address frame
           when there is no code generated within the area/bank
           referenced by the .__.END. variable.

    2010_03_03 Version 5.00 Update 1

      This  update  for  Version  5.00  of the  ASxxxx Cross
    Assemblers includes fixes for the following errors:

      (1)  The newest versions of gcc (and perhaps other
           compilers) give warnings about missing arguments
           in the fprintf() function.  This update replaces
           fprintf(arg1, arg2) with fprintf(arg1, "%s", arg2)
           in each affected line of code.

      (2)  The newest versions of gcc (and perhaps other
           compilers) have defined 'getline' as a standard
           function in 'stdio.h'.  This conflicts with the
           function 'getline()' in the ASxxxx package.
           All references to 'getline()' have been changed
           to 'nxtline()'.

    2009_04_01 (Version 5.00)

      Added  a general purpose macro processor to the ASxxxx assem-
    blers.

      Added  true (t), false (f), and true or false (tf) condition-
    als to the  .if / .else / .endif  construct.   The  conditionals
    .ift,  .iff,  and .iftf allow replacement of the .else directive
    making the .if / .endif construct more readable.

    e.g.    .ift    if condition is true

      An  alternate  .if  construction has been added to the ASxxxx
    assemblers:

    e.g.    .if    eq,...   if argument == 0

      The  immediate  conditional statements have been added to the
    ASxxxx  assemblers.   These   conditionals   can   replace   the
    .if / ... / .endif construct for a single assembler source line:

    e.g.    .iifeq  arg     label:  .word   0x1234

      The alternate immediate conditional statements have also been
    added to the ASxxxx assemblers:

    e.g.    .iif    eq,arg  label:  .word   0x1234

      The  listing  options  for the ASxxxx assemblers has been up-
    dated to enable/disable any of the following parameters from be-
    ing output to a generated listing file:

       err         error codes
       loc         code location
       bin         assembler binary code
       eqt         symbolic equates / if evaluations
       cyc         machine cycles
       lin         assembler source line number
       src         assembler source code
       pag         paging control
       lst         listing of .list / .nlist
       md          macro definition
       me          macro expansion
       meb         macro expansion binary code

       !           sets the listing mode to
                   !(.list) or !(.nlist) before
                   applying the sublist options

    e.g.    .nlist  (lst,pag)       ; disable .list/.nlist listing
                                   ; and pagination

      The  NOT parameter, !, is used to set the listing mode to the
    opposite sense of the .list or .nlist directive.  For example:

       .nlist (!)  is equivalent to .list and
       .list  (!)  is equivalent to .nlist

    To enable listing and simultaneously disable the cycle count use
    the directive:

       .nlist  (!,cyc)

    or  if  you  wish  to suppress the listing of the .list / .nlist
    directives:

       .nlist              ; disables all listing
       .nlist  (!,lst)     ; enables  all listing except
                           : .list (...) and .nlist

      Normally  the  .list  and .nlist directives are not evaluated
    when encountered within a FALSE conditional block.  This default
    behavior  can  be  modified by specifying a non zero argument in
    the .list or .nlist directive:

       .nlist   1,(!,lst)  ; enables listing even within
                           ; a FALSE conditional block

      The .bndry assembler directive has been added to ASxxxx.  The
    .bndry directive changes the  current  location  address  to  be
    evenly divisible by a specified integer value.

    e.g.    .org    0
           .bndry  4

           ; . == 0

           .org    1
           .bndry  4
           ; . == 4

    2009_02
      Added the Cypress PSoc (M8C) ASM8C assembler
      to ASxxxx.

    2008_09
      Added the 8048 (8021, 8022, and 8041) AS8048
      assembler to Asxxxx.

    2008_02
      Added the SC/MP ASSCMP assembler to ASxxxx.

    2008_02_03 (Version 4.11 Update 4)

      An update to the AS2650 assembler to
      fix the following errors:

      1)  The indexed addressing mode generates invalid
          code by using the first argument register as
          the index register: (addr = 0x1234)

              loda    r0,[addr,r1]          0C F2 34
                      this should give      0D F2 34

      2)  The index addressing mode did not generate
          an addressing error when the first argument
          register was not r0:

              stra    r1,[addr,r2]  should give an
                      error, the source must be r0

              loda    r2,[addr,r3]  should give an
                      error, the destination must be r0

      3)  The S2650 auto increment and decrement indexing
          modes always perform the register update before
          the register is used. i.e. +Rn or -Rn.  The
          assembler now accepts +Rn or Rn+ as meaning
          pre-increment and -Rn or Rn- as meaning
          pre-decrement.

      The AS2650 assembler tstscn files have been updated
      for testing the assemblers.

    2007_10_21 (Version 4.11 Fix)

      In the AS6816 assembler the instruction ANDP gives
      wrong object code. Changed from 37 2A  to  37 3A.

    2007_04_01 (Version 4.11 Update 3)

      An update to the ASPIC assembler and
      associated fix to ASLINK:

      1)  Change the pic addressing to lo/hi from hi/lo
          byte ordering.

      2)  The update fixes an error in the pic17 series
          LCALL instruction.

      3)  A rewrite of the pic18 series assembler to change
          the PC addressing from 1 per 16-bit word to 1 per
          8-bit byte and add the extended instruction set.

      4)  Modify the Linker Merge Mode processing to take into
          account the discarded low order bits for PC Relative
          Addressing.

      5)  New  tstscn files for testing the assemblers.

    2006_11_01 (Version 4.11 Optional Update 2)

      1)  OS9  definition files and an  OS9 assembler module
          which creates the OS9 header, code and data areas,
          and the module CRC block:

               os9_mod.def       OS9 Module Definitions
               os9_sys.def       OS9 Sytem  Definitions
               os9_mod.asm       OS9 Module Begin / End Code

      2)  a program, s19os9, to post-process  assembled  OS9
          modules in  S19  format into  binary  OS9  modules
          with the appropriate  header  checksum  and module
          CRC values calculated.

      3)  new  make  and  project files which may be used to
          compile the s19os9 program.

    2006_11_01 (Version 4.11 Optional Update 01)

      The .list  and  .nlist  directives  are  now  modified
      by .if / .else / .endif  processing  so  that they are
      active only in a TRUE clause.

      The  .page  and  .include  directives are now modified
      by the .list and .nlist  directives so that pagination
      occurs only when listing is active.

      The new  default functionality for the  .list,  .nlist
      and .page directives may  be  modified by including an
      optional argument  in the  directive as shown here for
      the .list directive:

         .list    arg

      a non-zero argument invokes the directive irrespective
      of the .if / .else / .endif status.

    2006_07_26 (Version 4.11 Patch 01)

      The  assembly  of  a  direct  page  instruction with a
      numeric  constant  causes a program  crash when a .rel
      file is created. e.g.:

           andb    *0x02

      The  use  of  a  symbolic  constant  or  symbol plus a
      a constant compiles normally.

           val = 0x02

           andb    *val
           andb    *extern+0x01

      The assemblers effected are:

           as6809
           as6812
           ash8
           aspic

      Summary  of  changes/additions  to the ASxxxx Assemblers from
    Version 4.10 to Version 4.11.

        1.  Incorporated  the patches contained in p01410.zip which
            corrected a coding error that affected BANKS containing
            multiple ABS areas or mixed AREA types.

        2.  Incorporated  the patches contained in p02410.zip which
            corrected improper use of  R_USGN  in  most  addressing
            modes  in AS6500.  This caused unexpected  errors in
            V4.xx because of the ASxxxx core change to  32-bit  in-
            tegers and arithmetic.

        3.  Incorporated  the patches contained in p03410.zip which
            corrected errors in the  .local  and  .globl  assembler
            directive  processing  routine that introduced unwanted
            side effects for variable and symbol definition  files.
            These  effects included improper definitions and incor-
            rect error warnings.

        4.  The  following  new subdirectories and their files have
            been added to the asxtst directory:

             *  areabank     Area and Bank Processing Test
                This  directory  contains  several  test  programs:
                ts.asm (single file - multiple areas), tm1.asm  and
                tm2.asm  (multiple  file  -  multiple  areas),  and
                tbm.asm, tbm1.asm, and tbm2.asm ( multiple  file  -
                multiple  areas  within  a  bank) and several other
                files which verify the  correct  operation  of  the
                linker  when used with a single linked file, multi-
                ple linked files having no  banking,  and  multiple
                linked  files  with banking.  These reference files
                show in detail how the .area and  .bank  directives
                work together.

             *  equtst       Equate Processing Test
                This  directory  contains a test file for verifying
                the operation of the .globl, .local, .equ, .gblequ,
                and  .lclequ  directives  and  the  =,  ==,  and =:
                equalities.

             *  inctst       Nested Include File Test

             *  itst         Include File Error Reporting Test

        5.  Incorporated  the updates contained in u01410.zip which
            added 10 undocumented 8085 instructions to  the  AS8085
            assembler.

      Summary  of  changes/additions  to the ASxxxx Assemblers from
    Version 4.00 to Version 4.10.

        1.  Added new assemblers for the Zilog EZ80, Zilog Z8, Sig-
            netics 2650, and Fujitsu F2MC8(L,FX) processors.

        2.  Added the processor cycle count option (-c) to all pro-
            cessors.

        3.  Several   of  the  assemblers  (ASZ80,  ASRAB,  AS6805,
            AS6808, AS6812, ASF2MC8, ...) now  support  subsets  or
            supersets  of  their basic opcodes by the use of assem-
            bler specific directives.

        4.  Added .ifeq, .ifne, .iflt, .ifgt, .ifle, and .ifge con-
            ditional assembly directives.

        5.  Added  support  for the Tandy Color Computer Disc Basic
            binary file format to ASLINK.

        6.  Problem:
            When  an area size is equal to the 'address space size'
            the size parameter is reported as 0.  (A normal  condi-
            tion  caused  by  address rollover to 0.) Aslink inter-
            preted this as a 0 size.

            Fix:
            A  new area 'Output Code Flag' bit was defined to indi-
            cate when data is  defined  in  an  area.   ASxxxx  and
            Aslink  have  been updated to set and process this area
            flag bit.

        7.  Problem:
            The  use  of  the .end assembler directive in an Asxxxx
            assembler would cause Aslink  to  output  the  optional
            start address in all output files.

            Fix:
            Updated  Aslink  to  output  the optional start address
            only in the output file associated with  the  area/bank
            containing the .end directive.

        8.  Problem:
            Aslink  creates  output  files for banks with no output
            data.

            Fix:
            Aslink  now  deletes  any created output file for banks
            with no data.

        9.  Incorporated  the  patches  contained in p01400.zip for
            files t1802.asm and 1802pst.c to correct for  an  error
            in  the  opcodes  generated  for  the  BM,  BL, and BNF
            mnemonics.

       10.  Incorporated  the  patches  contained in p02400.zip for
            file ds8adr.c to correct for an  error  in  the  direct
            page addressing mode of AS8xCxxx.

       11.  Incorporated  the  patches  contained in p03400.zip for
            file rabmch.c to correct for an error in the processing
            of the "ret cc" instruction.

       12.  Made many corrections to internal code comments.

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