v1.1.1

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Can assemble...

• The Sonic 1 Git disassembly
• SuperEgg's Sonic 2 Nick Arcade disassembly
• The Sonic 2 August 21st prototype disassembly
• The Sonic Spinball disassembly
• The Mean Bean Machine disassembly
• Vladikcomper's debugger and error handler (ASM68K version)
• Aurora Fields' Z80 macros
• The Puyo Puyo disassembly

Added features

• PURGE.
  • Undefines a macro.
• Alternate operand syntax.
  • (Label,pc,d0.w)
  • (4,a0,d0.w)

Fixes

• Macros not being redefinable.

v1.1

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Added features

• Warnings about opcodes having a dot but no size now only print when pedantic warnings are enabled.
• Automatic even.
  • Forces DC, DCB, DS, and RS which are word- or longword-sized to begin at the next even address.
  • Enabled with ae+.
• DS directive.
  • Allocates spaces and fills it with 0s.
• Default arguments for the C++ interface.

Fixes

• Special macro arguments (like \_) not always being substituted.
• Functions like DEF and STRCMP returning 1 instead of 0xFFFFFFFF.
• IF, ELSE, ENDC, ENDR, and similar keywords not being detected if they are hidden inside a short macro (declared with MACROS keyword).
• MOVE not being compatible with having a register list as either of its operands.
• INCBIN's start offset not being optional whilst a length is specified.
• Non-string macro arguments not being converted to lowercase when case-insensitivity is enabled.
• DC directive range errors printing numbers as decimal rather than hexadecimal.
• Special macro arguments not absorbing their trailing backslash.
• Got C++ interface wrapper working again.
• Macro arguments and string constants not all being applied in order from left to right.
  • Previously, macro arguments were always applied first, even if string constants occurred before them.
• Fixed 'symbol redefined' errors for macro-local variables which use forward references.

v1.0.1

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Added features

• 'FILESIZE' function.
• Alternate opcodes from axm68k.

Fixes

• 'MACROS' not being able to create dangling if-statements.
• 'STRCMP' being treated as 'STRLEN'.
• '_' potentially containing trailing garbage data.
• 'SUBSTR' not allowing its end to be before its start.
• 'EQUS' not being able to use a string constant as its input.

v1.0

Read the full update report on my blog!

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Can assemble...

• The Sonic 1 Git disassembly
• SuperEgg's Sonic 2 Nick Arcade disassembly
• The Sonic 2 August 21st prototype disassembly
• The Sonic Spinball disassembly
• The Mean Bean Machine disassembly
• Vladikcomper's debugger and error handler (ASM68K version)
• Aurora Fields' Z80 macros

Added features

• Eliminated 1024-character line length limit.
• Comments in listing files.
• EQU/SET/RS values in listing files.
• EQUS SUBSTR, and INSTR (string-processing).
• Expansion of all macros in listing files (/m command line option).
• Forward-references to variables.
• PUSHO and POPO (push and pop options state).
• OPT (set options).
• Escaped quotes within strings.
• PUSHP and POPP (push and pop string constants).
• Custom option wp+ (enables pedantic warnings).
• SHIFT (removes a macro argument).
• MEXIT (prematurely terminates macro expansion).
• LOCAL (limits a symbol's visibility to the surrounding macro).
• Alternative local label signifiers ('l+', 'l-', etc. options).

Fixes

• Listing files not showing include directives.
• Trailing white-space being included in macro arguments.
• Nested REPT directives still not working.
• Nested WHILE directives not working.
• Macros modifying the input of REPT directives rather than their output.
• Greatly improved the accuracy of inserting arguments into macro expansions.
• NARG being a preprocessor constant instead of an assembler variable.
• NARG never being 0.
• Code overwritten using ORG being reverted if the overwritten code contained a forward-reference.
• 'and.w #1,sr', or.b #1,ccr, and similar instructions failing to assemble.

v0.4

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Added features

• The \_ macro parameter specifier.
• The strcmp function.

Fixes

• Macro parameters sometimes not being substituted.
• Empty strings not being recognised as strings.

v0.3.1

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Added Features

• C++ wrapper, for easily integrating this assembler into other projects.
  • Used by ClownMapEd.

Fixes

• RS labels being able to be used before they were defined (#13).
• Directives beginning with '.' causing a crash (#16).
• Nested REPT directives conflicting with each other (#17).

v0.3

Note

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom, simpler interface that is incompatible.

Added Features

• The '\@', '\#', and '\$' macro parameters.
• The OBJ and OBJEND directives.
• Passing RSRESET a parameter.
• The ORG directive.
• The FAIL directive.
• The DEF directive.
• The '/e' command line parameter, allowing constants to be defined.
• The 'label.w' and 'label.l' absolute address syntax.
• Misused instructions are automatically corrected to the appropriate instruction, instead of producing an error.
• The '/v' command line parameter, allowing local labels to be included in the symbol file.
• The 'w+' and 'w-' options, allowing warnings to be enabled and disabled.

Fixes

• Made RS, RSSET, and RSRESET behave accurately to asm68k.
• Fixed using constants for INCBIN parameters.
• Fixed asm68k-style frontend ignoring all options after the first one.
• Renamed '__RS' to '__rs' to match asm68k.
• Fixed broken dictionary logic which was causing symbols to be missing from the symbol file (#10).
• Fixed true 'ELSEIF' directives causing later conditions to be processed incorrectly (#9).

v0.2

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom interface that is incompatible.

Can assemble...

• The Sonic 1 Git disassembly
• SuperEgg's Sonic 2 Nick Arcade disassembly
• The Sonic 2 August 21st prototype disassembly
• The Sonic Spinball disassembly

Changes:

• Added support for nested macros.
• Fixed identifiers being mistaken for registers.
• Fixed uppercase Z80 hexadecimal numbers not being recognised
• Fixed integers that are too large being saturated instead of truncated.
• Fixed random crashes and nonsensical 'symbol undefined' errors (bugged dictionary).
• Added support for macros using their associated label using '\*' (this is needed by MainMemory's MapMacros).
• Fixed 'else' following 'elseif' being treated as always true.
• Fixed CNOP sometimes padding to the second-next boundary instead of the first-next.

v0.1

Initial release. Can assemble the Sonic 1 Git disassembly and SuperEgg's Sonic 2 Nick Arcade disassembly.

clownassembler_asm68k.exe is the one that mimics asm68k's interface; clownassembler.exe has a custom interface that is incompatible.