• DASM: Improvements in assembler-time performance.
• DASM: Many compatibility fixes to match newer HLASM behavior.
• DASM: Fix compatibility with HLASM when USINGs that depend on labeled USINGs survive across a PUSH USING / POP USING pair.
• DASM: Replace old -fhtml_listing idiom with -flisting_style=none/txt/html/both and -fhtml_suffix=.html so that we can emit both the txt and html listing at once
• DASM: Error message reporting was enhanced to include more information.
• DASM: Implement -ffail_msg=n, -ffail_mnote=n, -ffail_maxerrs=n, which are equivalent to the HLASM FAIL(MSG(n),MNOTE(n),MAXERRS(n))
• DASM: Support the new OPTABLE(ZS9) instructions (z15).
• DASM: Support the new OPTABLE(ZS8) instructions (z14).
• DASM: DASM on the Mac OS X (386) host was changed to be a 64-bit executable, as Apple is deprecating the ability to run 32-bit programs.
• DASM: Fix compatibility with HLASM when labeled USINGs and dependent USINGs are chained together. Now it correctly matches the quirk where sometimes a dependent USING can become un-DROP-able.
• DASM: Apply two-byte alignment to LTORG literals that are referenced from relative-immediate instructions such as LARL.
• DASM: Add -enc=utf8 option for UTF-8 sources. The old behavior is -enc=auto, which looks at the first line to select between -enc=fb80 and -enc=ebcnl (EBCDIC hosts) or -enc=iso88591 (ASCII hosts).
• DASM: Improve performance for USS host by enabling faster direct PDS I/O for //DSN: and //DDN: files.
• DASM: Support OPTABLE(ZSA) instructions.
• DASM: Implement the ILMA option, which is now the default. Any macro added while ILMA is in effect appears in all of the OPTABLEs.

  The old behavior (NOILMA) only adds it to the current OPTABLE.

• DASM: Implement &SYSOPT_CURR_OPTABLE, which is like &SYSOPT_OPTABLE but it changes whenever OPTABLE changes (&SYSOPT_OPTABLE had previously erroneously filled this role).
• DASM: Implement MACRO recursion limit of 10,000, so we get a sensible error message (DASM005S) instead of Abort trap.
• DASM: Support for 64-bit Linux host.
• DASM: Cache the list of files in macro library paths to reduce the overhead involved in a macro search.
• DASM: Add -zip=filename option to DASM to collect all the sources needed to re-produce the assembly.
• DASM: On MVS and OE, if a maclib path is accessible as a PDS, don't try to use any non-PDS I/O on it. A significant performance improvement when DASM is run on OE with many PDSes in the maclib.
• DASM: Improve performance for USS host by enabling faster direct PDS I/O for //DSN: and //DDN: files.
• DASM: Support retrieving MVS system symbols under USS.
• DASM: Restore support for early resolution of "DS 0XL(unresolved)" if -fenhancedequ is specified.

• DCCPA: Add EXEC CICS CHANGE PHRASE and EXEC CICS VERIFY PHRASE to the DCCP grammar.
• DCCPA: Add about a dozen each of missing DFHRESP() and DFHVALUE() keywords.
• DCCPA: Update CICS ENABLE PROGRAM translation. Add new system programming EXEC CICS CSD commands: ADD, ALTER, APPEND, COPY, DEFINE, DELETE, DISCONNECT, ENDBRGROUP, ENDBRLIST, ENDBRRSRCE, GETNEXTGROUP, GETNEXTLIST, GETNEXTRSRCE, INQUIREGROUP, INQUIRELIST, INQUIRERSRCE, INSTALL, LOCK, REMOVE, RENAME, STARTBRGROUP, STARTBRLIST, STARTBRRSRCE, UNLOCK, USERDEFINE.
• DCCPA: Implement EXEC CICS system programming commands for CREATE/DISCARD/INQUIRE/SET IPCONN.

• DASM: Implement OPTABLE(ZS7), the z13 instructions. Adds support for the new vector instructions.
• DASM: support the new ESYM builtin SETC function. On cross-platform hosts this simply queries the normal environment variables.
• DASM: DASM can't expand characters in the input as was historically performed , consider something like DC C'' - that should assemble to a single X'05' byte, not a string of spaces.

  Also - users put characters into comment lines; if we expand the characters, then the comment runs into the continuation column... so text that would assemble with HLASM (as it simply treats the as a byte) does not assemble with us.

  The -tc option now defaults to 0 (indicating no expansion.) to get the previous behavior, specify -tc 8.

• DASM: Honor FLAG(NOEXLITW), which disables DASM016W warning for EX instructions that reference a literal operand.
• DASM: Add support for -umapext / USING(MAPEXT), which provides an additional line in the Using Map for each USING that specifies the statement numbers where that USING was used.
• DASM: Add -libncase, which makes maclib searches case-insensitive regardless of the underlying filesystem.
• DASM: When running on MVS, properly recognize HFS paths in macro processing so that DASM can use a MACLIB that is stored on HFS (i.e., -L/path/&M) even when executed from TSO or BATCH.
• DASM: General audit of the OPTABLE to ensure it is consistent with HLASM:
  • Generally fix up flags on OPTABLE(ZS5) and OPTABLE(ZS6) opcodes.
  • Improve OPTABLE(LIST) output.
  • Add missing opcodes: PCKMO, PPNO.
  • Support new optional operands on: IDTE, IPTE.
  • Move a few z/Arch opcodes into OPTABLE(ESA) to support "z/Architecture facility for ESA".
  • New diagnostics for SPKA with unwise or useless operands.
  • Make some warnings and listing details better match HLASM.
  • Accept overflow (CC=3) for LOC*NE, LOC*NL, LOC*NH, STOC*NE, STOC*NL, STOC*NH.
  • Make BPP and BPRP accept an address properly.
  • Fix TYPECHECK(REG) flags for a few instructions.
• DASM: Use 5 hex digits for the USING MAP's Max Displacement column, to represent "long displacement" instructions (such as LAY). Also, use the relative offset consistently for Max Displacement and Range.
• DASM: check for duplicate specification of named parameters in macro call and issue message #018. Also, IBM APAR PI28368 (Dec. 2014) changed return code for ASM018 from 12 to 08, so DASM message #018 changed to match.
• DASM: Accept an indefinite quantity of whitespace between a mnemonic and its first operand (including continuations) for macro calls and SETA/SETB/SETC/etc.
• DASM: Evaluate DC expressions even when the dup-factor is zero.
• DASM: Check for 31-bit overflow when evaluating DC expressions and issue DASM message 075E - Arithmetic overflow.
• DASM: DASM no longer applies more than one ALIAS name to the same ESD (i.e., "A ALIAS C'B'", then "B ALIAS C'C'" will no longer convert 'A' to 'C').
• DASM: Implement TYPECHECK(REGISTER) (-tc reg).
• DASM: For HLASM compatibility, emit a warning if *PROCESS OPTABLE(...) conflicts with the commandline, and don't honor *PROCESS OVERRIDE(OPTABLE(...)) at all.
• DASM: Sort the unreferenced symbols (-nx) listing by ascending statement number, like HLASM does.
• DASM: Make listing lines for the data members of an LTORG instruction even if it occurs inside a macro context with PRINT NOGEN.
• DASM: Add the name of the symbol to the DASM032E error message when it is available.
• DASM: If a symbol is referenced before it is defined, it still needs to be excluded from the "Unreferenced Symbols" (-nx) listing.
• DASM: Implement PRINT MCALL, showing &var-substituted macro calls in the listing.
• DASM: Implement MHELP macro trace listing.
• DASM: Message #042 was an error in HLASM V1R5 but is a warning in HLASM V1R6; so now it's a warning for DASM too.
• DASM: In the HTML listing's title, put the short filename first, so that it's easier to manage web browser tabs.
• DASM: Implement "-uwarn n", where n is a bitmask controlling which USING warnings will be generated. 1 means USINGs that have no effect, 2 means R0-based USINGs, and 4 means multiple resolution USINGs (default is 15, all of the above). These control diagnostics DASM300W, DASM301W, DASM302W, DASM303W, and DASM306W.
• DASM: The value for the operand of SPACE can be any 4-byte value (unsigned) value; we restricted it to the range 1-255. Also - if the value was large enough, the calculation on "is the # of lines remaining on the page" could wrap-around, which could produce *many* blank lines instead of a simple EJECT.
• DASM: Support XREF(FULL), XREF(SHORT), NOXREF etc.. HLASM-style options.
• DASM: Add new commandline option -flisting_style=none/txt/html/both (txt is the default), so that both text and html listing can be emitted at once. And add -fhtml_suffix= to specify an alternative suffix to .html.
• DASM: On going HLASM compatibility changes.

• DCCPA: On Windows, the output file is opened in BINARY mode handle possible EBCDIC FB80 output (when DCCPA determines the source if FB80 EBCDIC.)

  If the source isnot FB80 EBCDIC, then it is "plain" text, and we need to generate the proper end-of-line sequence for DCCPA-generated code (\r\n) for the BINARY output file.

• DCCPA: make EXEC CICS ASSIGN and EXEC CICS WRITE OPERATOR match the VSE translator when -fvse is specified.
• DCCPA: When there is an & in a character literal argument, disregard the length limit because DCCPC can't be sure how big the resulting string will be after &-variable substitution.
• DCCPA: A few miscellaneous CICS additions. Support EXEC CICS ADDRESS CSA() (which was older than our documentation). Support DFHVALUE(UNENABLING). Support NOEDF common argument.
• DCCPA: Update CREATE FILE, DELETE, INQUIRE PROCESSTYPE, READ, READNEXT, READPREV, RESETBR, STARTBR, WRITE to match CICS TS V4R1.
• DCCPA: Bug #2753 - Bring up to date with CICS TS V4R1.
• DCCPA: Support CLNTCODEPAGE as an alias for CHARACTERSET on the EXEC WEB SEND. command.
• DCCPA: *PROCESS XOPTS lines should be stripped from the output, and *ASM XOPTS should not be.

• DASM: Improved PDS reading on z/OS to avoid duplicate OPEN processing for each PDS member.
• DASM: New -fvselibr option; if enabled /+ at the start of a line is recognized as end-of-file.
• DASM: New -fhtml_listing option to generate listing
• DASM: New -fnolonglines that disables -flonglines.
• DASM: Significantly improve DASM performance and memory "footprint".
• DASM: The -ux/-xux options were replaced with -umap and -xumap, and accept USING(MAP).
• DASM: -M dependency list generation corrected to match Dignus compiler output.
• DASM: New -fsyspath and COMPAT(SYSPATH) options to indicate that the &SYSxxx_DSN>/MEMBER/VOLUME macro variables should be set compatibly with HLASM under USS.
• DASM: Improved HLASM V1R6 compatibility, including:
  • Support for quad-word aligned sections in non-GOFF objects, generaing CQ,PQ,SQ ESD types for CM, PC and SD sections.
  • HLASM silently clips SECTALGN values to 16, so DASM now does to.
  • Support optable and instructions, extended mnemonics thru ZERIES6/ZS6.
  • Support for FLAG(PAGE0) and related warnings/messages.
  • Support U suffix for F and H constants and allow leading zeros in values.
  • SYSPARM size extended to 255 bytes to match HLASM.
  • Support :ASM and :MAC suffixes.
  • Support for ACONTROL OPTABLE and new -foptable=val option.
  • ADATA compatibility fixes.
  • Change IEXTR/IEDTR opcodes to match HLASM APAR PK91239.
  • Support for O' attribute
  • Support CU'xyz' literals for UTF-16 strings.
  • New diagnostic messages DASM015W, DASM016W and DASM030E.
  • Listing improvements to match HLASM.
  • Implement special values for Decimal constants.
  • Support SY-type constant.
  • Support relative relocations.
  • Blank lines in the source now get blank lines in the DASM listing, similar to HLASM.
  • Corrections in literal managenent to match HLASM's behavior.
  • CNOP now supports 16-byte alignment.
  • SECTALGN changes to track HLASM's changing behavior.
  • Support TERM/NOTERM/TERM(NARROW) options.
  • Significant compatibility changes in the areas of USING, dependant usings, relocations, complex relocatable expressions.

• DCCPA: Support fro EXEC CICS WEB commands
• DCCPA: New LEASM option for creating LE-compatible assembly.
• DCCPA: New -fnoedf option, to set the common flag X'40' in translated CICS output.
• DCCPA: Add support for special VSE translations for the following EXEC CICS commands: SPOOLCLOSE, SPOOLCLOSE REPORT, SPOOLOPEN ESCAPE, SPOOLOPEN INPUT, SPOOLOPEN MAPNAME, SPOOLOPEN OUTPUT, SPOOLOPEN REPORT, SPOOLOPEN RESUME, SPOOLREAD, SPOOLWRITE, SPOOLWRITE MAPNAME, SPOOLWRITE REPORT, INQUIRE PROGRAM, INQUIRE TASK.
• DCCPA: Support more EXEC CICS commands, up thru CICS TS V3.2 commands.
• DCCPA: Accept "->" and "[]" in C language addressing argument expressions.

• Ongoing compatibility and performance improvements.

• HLASM 1.6 compatibility, including, but not limited to:
  • Integrated support for instructions and new instruction formats thru the z/HE line of processors.
  • Unsigned constant values in F-/H-type constants.
  • mnemonic suffixes, :ASM/:MAC.
  • New SY-type and QY-type constants.
  • Support for decimal special values and types.
  • Ignore leading zeros in decimal, binary and hexadecimal self-defining terms.
  • Ability to add OPTABLE to the ACONTROL instruction.
  • Improved diagnostics.

• Support for new 'asma90 compatibility mode'. If DASM is executed via the 'asma90' command, it operates compatibly with IBM's asma90 program.

• Support for new -options="string" option that allows DASM to process HLASM PARM values without mapping to DASM options.

• Ongoing compatibility and performance improvements.

Release 1.80 of DASM provides the following enhancements:

• HLASM 1.5 compatibility, including, but not limited to:
  • HLASM V1R5 ADATA format
  • New RRR and SSF instruction formats, and support for z9 BC decimal FP, floating point and other miscellaneous instructions and data types.
  • Increase the SETC and macro parameter length to 1024.
  • Support for new options, SUPRWARN/NOSUPRWARN, FLAG(SUBSTR), IMPLEN/NOIMPLEN, FLAG(CONT)/FLAG(NOCONT), SECTALGN.
  • Length checks for DP and MP instruction operands.
  • New 'Relocatable Immediate' RLD type for relative references to external symbols. Listing now uses the HLASM V1R5 format of the "Relocation Dictionary."
  • Support program attribute on DC and EQU values.
  • ORG psuedo-op extended with new 'boundary' and 'offset' operand expressions.
  • Support for HLASM V1R5 conditonal assembly functions syntax and full support of HLASM V1R5 functions.
• Command line parameters are now provided in the Options Summary section of the listing.
• New DASMINI environment for expanded parm processing.
• Accept CE'string' and CA'string' for explicit EBCDIC/ASCII constants.
• Generate an IBM "events file" for use in Websphere, Rational developer or the TPF and z/TPF toolkit products.
• IDR default now changed to be different than HLASM.
• Support for EXCI mode in DCCPA CICS preprocessor.
• On going support and general enhancements that improve compatibility with HLASM V1R5.
• Support for Solaris/x86 cross-platform.

• Added support for the &SYSMAC builtin variable
• Support HLASM 1.4 THREAD/NOTHREAD option
• Add support for reading a file from the STDIN stream
• Listing lines from COPY, MACRO, AINSERT and AREAD while now be properly annotated with the HLASM defined characters (+,=, etc..)
• Support DEQUOTE built-in
• New FLAG(CONT)/FLAG(NOCONT) options and associated continuation messages #430-433.
• Allow unlimited continuation lines on comments as the newer HLASM 1.5 appears to do.
• Support for the -profile=NAME,-xprofile option and PROFILE options in *PROCESS statements. Causes DASM to include NAME as if it appeared on a COPY statement at the start of the primary source file.
• Instructions from the z/990 Facility #3 were added: CU12, CU21, CU14, CU41, CU24, CU42, TRTR, SRSTU, ESAIR, EPAIR, PTI and SSAIR.
• Symbolic cross-reference algorithms where enhanced to provide a 15-times speed up when the -cxs (XREF(SHORT)) option is enabled.
• Support for J-type constants; which hold the length of a DXD or DSECT (filled in by the linker). Support for RSECTs, etc... to allow full GOFF DLL-creation support.
• HLASM 1.5 alignment enhancements:
  • New -sectalgn option and handling of SECTALGN in *PROCESS statements. Literal pools and sections are aligned on the SECTALGN boundary.
  • Literal pool management extended to 5 literal pools, with literals that are a multiple of 16-bytes going into the first (new) pool.
  • Message DASM500W to warn when a literal's alignment was greater than that specified in SECTALGN.
  • Support for VD and QD type DC/DS constants.
  • Support HLASM 1.5 new maximum limits on scale modifiers for F and H constants.
• New ESD ID column in the Cross Reference listing.
• Support *ASM XOPTS and *PROCESS XOPTS in DCCPA
• Added -fmrc and -fnomrc options. -fmrc is the default and indicates that mainframe-return-codes should be used. -fnomrc indicates UNIX-style return codes.
• Added some CICS TS features to READ/READNEXT/READPREV in DCCPA
• Support EXEC CICS SET FILE/DATASET command in DCCPA

Release 1.75 of DASM provides the following enhancements:

• A new -fmaxrc=n option was added. If the total return code from DASM is greater than `n', then any partially written output object will be deleted.
• A new -fdate=[[[[[cc]yy]mm]dd]HH]MM[.ss]] option was added. This option sets the 'assemble date/time', used for the listing, the value of SYSCLOCK, the time-stamp on END cards and the time values returned by AREAD.
• Support for the new TYPECHECK option, similar to up-coming HLASM (described in APAR PQ69375.)
• Many performance improvements, in some cases resulting in up to 27% assembly-time improvements.
• The assembler, by default, keeps its temporary work file in memory. The new -size=0 option is supported to indicate that the temp file should be kept on-disk instead.
• The "Statements Flagged" section is presented in the listing and the FLAG(RECORD) (-frecord/-fnorecord) options are supported.
• New COMPAT(LITTYPE) (-clit) option supported, which controls application of type-attributes to literals.
• New UNREFS XREF (-nx option) which generates a listing section containing unreferenced symbols.
• The *PROCESS statement is supported.
• A new -tr XX=YY option, which controls how EBCDIC<->ASCII translation is performed on cross-platform hosts.
• Support for FLAG(ALIGN), FLAG(NOALIGN) (-f align, -f noalign) options, which also control message #212 and #213.
• New -pestop, -xpestop options.
• DASM now properly handles ACONTROL statements and the PUSH/POP ACONTROL commands.
• New -ra2 and -xra2 options similar to HLASM's RA2 and NORA2. to HLASM's RA2/NORA2.
• Improved HLASM compatibility and other corrections.

Release 1.70 of DASM provides the following enhancements:

• Support for new z990 instructions and Y-type instruction format, and the new -yop option to enable/disable these.
• New -mcase option, similar to HLASM's OPTION(MACROCASE).
• ADATA generation improved to be more compliant with HLASM.
• Added missing mnemonics for branch relative, Jump instructions, etc.. these are not documented in the HLASM documentation; but appear in the z/Architecture Reference Summary
• The 'System Name' and &SYSID variable are improved to include the operating system type and release for cross-platform hosts.
• Added "Diagnostic Cross Reference and Assembler Summary" section in the listing, similar to HLASM.
• Support for Linux/390 and z/Linux (ELF) objects, using ASM source that is as unchanged as possible. This makes porting HLASM source from traditional mainframe operating systems to mainframe Linux much easier. This support includes complete debugging information representing line numbers in the original source, as well as DSECT member information.
• Improved CICS preprocessor support in DCCPA.
• Ongoing corrections and maintenance.

Release 1.60 of DASM provides the following enhancements:

• New hosted platforms, z/Linux (64-bit mainframe linux) and OpenEdition (Unix System Services.)
• Under OpenEdition, DASM can read EBCDIC new-line delimited source/macros from the HFS as well as PDS members.
• New DCCPA utility - a complete CICS pre-processor, supporting CICS TS V2 and CICS ESA R4.
• Improved ADATA format, much more closely matches IBM's HLASM output.
• Improved documentation, PDF documentation now includes a table of contents with links into the document.

Release 1.50 of DASM brings many new features.

• Extensions to support Systems/C++.
• Full support of GOFF format objects.
• Support for Associated Data (ADATA) information, either embedded in GOFF objects, or as a separate file.
• Support for the ADATA instruction.
• 64-bit instructions and data formats.
• Listing reformat to look more like IBM's HLASM listing instead of ASMH.
• New listing cross-reference information.
• New extended message formats that include extra information.
• Extensions to the % expansion characters in MACRO and COPY file name searches.
• Support for accessing MACRO and COPY members from PKZIP archives.
• Performance enhancements, assemblies are now 10% to 20% faster than with V1.00.
• Several HLASM compatibility corrections.