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64tass 1.51 Build 943

Macro assembler for the 65xx series of processors

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Average rating: 5/5 (1 votes)
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Very useful and easy to use multi pass optimizing macro assembler program for the 65xx series of processors.


- Open source, mainly portable C with minimal dependencies
- Familiar syntax to Omicron TASM and TASS.
- Supports 65C02, 6502, W65C02, R65C02, 65816, 65CE02, DTV, 65EL02
- Arbitrary-precision integers and bitstrings, extra precision floating point numbers
- Byte strings and character, batch arithmetic
- Works with UTF-8, UTF-16 and 8 encoded source files
- Compatible with unicode identifiers with compatibility normalization and case folding
- Integrated "linker" with section support
- CPU or flat address space for generating large binaries (e.g. cartridges)
- Conditional compilation, scopes, macros, struct/union structures.

64tass is a command line tool, the source can be created in any text editor. As a least the source filename must be given on the command line. The "-a" parameter is very recommended if the source file is Unicode or ASCII.

Name 64tass
Version 1.51 Build 943
Developer | see all products from this developer
Product Homepage 64tass
License Free (Freeware)
Last Week Downloads 4
All Time Downloads 867
Filesize 0.6MB
MD5 Checksum 78A073764E6652EC144D86295A7C72B9
OS Support Win 7/8/Vista/XP
Category Developer Tools

100% CLEAN Certification

Badge64tass has been tested by team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. Our editors will recheck this software periodically to assure that it remains clean.


Old Versions

Software Date Added
64tass 1.51 Build 943 April 29, 2015 - Latest Version
64tass 1.51 Build 727 June 10, 2014
64tass 1.51 Build 584 January 31, 2014
64tass 1.51 Build 492 September 03, 2013
64tass 1.5x Build 337 February 21, 2013

Download the free 64tass