Macro assembler with support for several 8-bit microprocessors

 DASM is a versatile macro assembler with support for several 8-bit
 microprocessors including MOS 6502 & 6507; Motorola 6803, 68705, and 68HC11;
 Hitachi HD6303 (extended Motorola 6801) and Fairchild F8.
 .
 DASM boasts a number of features including:
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   * fast assembly
   * supports several common 8 bit processor models
   * takes as many passes as needed
   * automatic checksum generation, special symbol ’...’
   * several binary output formats available
   * allows reverse indexed origins
   * multiple segments, BSS segments (no generation), relocatable origin
   * expressions, as in C
   * 32-bit integer expressions
   * no real limitation on label size
   * complex pseudo-ops, repeat loops, macros