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Rev 1053 Rev 1115
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Visit http://flatassembler.net/ for more information.
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Visit http://flatassembler.net/ for more information.
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version 1.67.35 (Mar 09, 2009)
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version 1.68 (Jun 13, 2009)
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[+] Added SSSE3 (Supplemental SSE3), SSE4.1, SSE4.2 and SSE4a instructions.
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[+] Added the AMD SVM and Intel SMX instructions.
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[-] Some internal code size reductions.
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[+] Added "rdmsrq", "wrmsrq", "sysexitq" and "sysretq" mnemonics for the
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    64-bit variants of respective instructions.
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[+] Added "fstenvw", "fstenvd", "fsavew", "fsaved", "frstorw" and "frstord"
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[-] Discontinued "-d" switch implementation.
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version 1.67.34 (Feb 22, 2009)
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[-] Fixed small bug with DT directive far pointer syntax.
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version 1.67.33 (Feb 20, 2009)
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[+] Added ERR directive that allows to signalize error from the source.
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    mnemonics to allow choosing between 16-bit and 32-bit variants of
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version 1.67.32 (Feb 13, 2009)
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[+] Allowed single quote character to be put inside the number value,
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    to help improve long numbers readability.
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version 1.67.31 (Feb 11, 2009)
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[-] Fixed floating point converter to no longer generate NaN in some cases,
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    and corrected denormal numbers generation.
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version 1.67.30 (Feb 08, 2009)
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[+] Added missing Intel SSE4 instructions.
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[+] Added SSE4a (EXTRQ/INSERTQ/MOVNTSD/MOVNTSS) instructions.
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[+] Added FSTENVW/FSTENVD/FSAVEW/FSAVED mnemonics.
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version 1.67.29 (Nov 15, 2008)
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[+] Added optional symbolic information output, and a set of tools that extract
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    various kinds of information from it.
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[+] Allowed RVA operator to be used in COFF object format.
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[-] Corrected the FIX directive to allow names of preprocessor's directives to be
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    used as prioritized symbolic constant name.
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version 1.67.28 (Nov 06, 2008)
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[+] Added EFI/EFIBOOT/EFIRUNTIME subsystem keywords for PE format (experimental
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    feature, still needs to be tested).
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[-] Fixed a bug in preprocessor which caused some problems with DISPLAY directive
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    output in some cases.
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    structures used by the "fstenv", "fsave" and "frstor" instructions.
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[-] Fixed a bug that allowed to define a symbol named "eip" or "rip".
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[-] Fixed a problem with assembling MOVQ RAX,XMM0 instruction.
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version 1.67.27 (Jul 12, 2008)
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[-] Fixed a bug which caused instructions from JCXZ/LOOP family to be incorrectly
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    assembled when requiring 67h prefix and provided with "$" operand.
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[-] Definition of macro with the same name as one of the preprocessor's directives
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    is no longer allowed.
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[-] Fixed REPT directive to check out validity of its parameters even when the
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    count is zero.
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[-] Fixed VMREAD/VMWRITE syntax in the USE64 mode.
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[-] Corrected MZ header generation and handling for the case when the last page of
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    executable contains the round 512 bytes.
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version 1.67.26 (Jan 27, 2008)
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[+] Added partial SSE4 support (a couple of instructions left to be implemented
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    in the next releases)
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[+] Added GETSEC instruction for the SMX functions calling.
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[-] Some fixes and rearrangements in the DOS version.
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[+] Added "plt" operator for the ELF output format.
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version 1.67.25 (Dec 30, 2007)
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[-] Fixed a couple of bugs related to undefined symbol error signaling.
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version 1.67.24 (Dec 03, 2007)
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[+] Added "-d" option to allow predefining symbolic constants from command line.
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[-] Changed some of the error messages to be more informative.
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version 1.67.23 (Sep 08, 2007)
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[+] Added "static" keyword for the "public" directive in COFF format.
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[-] Redirected error information into stderr.
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version 1.67.22 (Aug 05, 2007)
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[+] Allowed to check "@b" and "@f" symbols with "defined" operator.
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[+] Allowed "as" operator to specify the output file extension when
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    placed at the end of the "format" directive line.
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[-] Fixed a bug with stack size declaration in PE64 format that
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    caused assembler to crash.
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[-] Corrected the VMREAD and VMWRITE instructions to allow registers
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    in place of memory operands.
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[-] Corrected a mistake that made PLT operator not work correctly with
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    the CALL instruction.
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version 1.67.21 (Feb 17, 2007)
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[+] Allowed 32-bit relocations in PE64 output format.
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[-] Fixed a bug that caused "push cr0" error to go unnoticed by assembler.
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version 1.67.20 (Feb 12, 2007)
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[-] Corrected the range checking of signed address displacements in 64-bit mode.
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[+] Allowed "rva" operator to be used in MS COFF object format, and also
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    added "static" keyword for the "public" directive.
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[+] Added Intel-style aliases for the additional long mode 8-bit registers.
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version 1.67.19 (Feb 10, 2007)
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[-] The PE formatter now automatically detects whether relocatable labels
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[-] Disallowed labels starting with $ character.
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    should be used, depending on whether the fixups directory is placed
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    somewhere into executable by programer, or not. This makes possible the
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[-] Fixed some problems with handling 32-bit relocations in 64-bit formats.
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version 1.67.18 (Dec 27, 2006)
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[-] Fixed a small mistake in the recent corrections of logical expression parser.
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version 1.67.17 (Dec 20, 2006)
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[-] Corrected the precedence of operators of macroinstruction line maker.
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    The symbol escaping now has always the higher priority than symbol conversion,
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    and both have higher precedence than concatenation.
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[-] Fixed problems with logical expression parser to handle correctly comparing
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    values containing round brackets with the EQ or EQTYPE operator.
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    The only limitation now is that when you use round brackets to enclose some
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    logical expressions, they must be paired everywhere inside those expressions.
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version 1.67.16 (Dec 17, 2006)
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[-] Fixed a really old bug in register expression calculator.
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    more flexible use of the addressing symbols in case of PE executable fixed
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version 1.67.15 (Nov 20, 2006)
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[-] Some final (?) fixes and cleanup in the relative-offsets calculations.
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version 1.67.14 (Oct 28, 2006)
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[-] Another small bug fixes.
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version 1.67.13 (Oct 26, 2006)
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[-] Fixed a bug with handling of invalid expressions by "defined" operator.
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[-] Fixed a newly-introduced bug with relocations in automatically generated RIP-relative
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    addressings.
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version 1.67.12 (Oct 1, 2006)
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[+] Added EIP-relative addressing, and fixed some bugs with RIP-related one aswell.
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version 1.67.11 (Sep 26, 2006)
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[+] Added PLT operator for the ELF output format.
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[-] Rearranged and fixed some of the relocation handling routines.
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version 1.67.10 (Sep 23, 2006)
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[+] Added SSSE3 (Supplemental SSE3) instructions.
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version 1.67.9 (Sep 21, 2006)
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[+] Added some Win64 headers and examples in the Windows package.
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[-] Fixed another operand size checking bug with MOVQ instruction.
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version 1.67.8 (Sep 17, 2006)
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[-] Fixed a bug in address processing that caused disallowed combinations like
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    [qword eax] to be accepted.
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version 1.67.7 (Jul 31, 2006)
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[-] Fixed a bug that caused over-repeated processing of macro operators when
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    many embedded macros were placed in one line
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[+] Added SYSRETQ mnemonic.
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version 1.67.6 (Jul 21, 2006)
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[+] Added (not yet documented) RDMSRQ/WRMSRQ/SYSEXITQ mnemonics for the 64-bit
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    variants of respective instructions.
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[+] Added information about memory allocation to the command line interfaces.
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    This should make it easier to decide when to use the -m switch.
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version 1.67.5 (Jul 7, 2006)
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[-] Fixed encoding of MOV (E)AX,[WORD ADDR] instruction in 32-bit mode.
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version 1.67.4 (Jul 5, 2006)
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[+] Added R8L-R15L (Intel-style) aliases for R8B-R15B registers.
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[-] Further optimizations in the parser.
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    at some position.
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[-] Added support for outputting the 32-bit address relocations in case of
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    64-bit object formats and PE executable. This makes some specific
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    instructions compilable, but it also forces linker to put such
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    generated code into the low 2 gigabytes of addressing space.
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version 1.67.3 (Jul 2, 2006)
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[-] Improved an instruction searching algorithm a bit.
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[+] Added "EFI", "EFIboot" and "EFIruntime" subsystem keywords for PE format.
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version 1.67.2 (Jul 1, 2006)
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[-] Fixed a recently introduced bug with ELF relocations in case of 32-bit
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    object.
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[-] Corrected the precedence of operators of macroinstruction line maker.
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    The symbol escaping now has always the higher priority than symbol conversion,
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version 1.67.1 (Jun 30, 2006)
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    and both have higher precedence than concatenation.
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[+] Added the support for the new AMD SVM technology instructions.
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[+] Allowed to check "@b" and "@f" symbols with "defined" operator.
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[+] Allowed "as" operator to specify the output file extension when
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        if eax eq EAX | 0/0
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	if eax eq EAX | 0/0
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                nop
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		nop
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        end if
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	end if
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    is parsed into just NOP instruction, since parser is able to determine
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    is parsed into just "nop" instruction, since parser is able to determine
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    that the condition is true, even though one of the logical values makes no
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    that the condition is true, even though one of the logical values makes no
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    sense - but since this is none of the "eq", "eqtype" and "in" expressions,
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    sense - but since this is none of the "eq", "eqtype" and "in" expressions,
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    the parser doesn't investigate.
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    the parser doesn't investigate.
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[-] The size operator applied to jump no longer applies to the size of relative
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[-] The size operator applied to jump no longer applies to the size of relative
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    displacement - now it applies to the size of target address.
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    displacement - now it applies to the size of target address.
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[-] The RET instruction with 0 parameter is now assembled into short form,
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[-] The "ret" instruction with 0 parameter is now assembled into short form,
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    unless you force using the 16-bit immediate with "word" operator.
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    unless you force using the 16-bit immediate with "word" operator.
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[-] Some of the internal structures have been extended to provide the
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[-] Some of the internal structures have been extended to provide the
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    possibility of making extensive symbol dumps.
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    possibility of making extensive symbol dumps.
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[-] Corrected FIX directive to keep the value intact before assigning it to the
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[-] Corrected "fix" directive to keep the value intact before assigning it to the
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    prioritized constant.
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    prioritized constant.
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[+] The ` operator now works with any kind of symbol; when used with quoted
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[+] The ` operator now works with any kind of symbol; when used with quoted