Zasm is a cross-platform assembler for 8080, HD64180 and Z80 originally developed by Günter Woigk. Zasm is developed for Unix-like operating systems like OSX, Linux, BSD, etc.

This assembler is licensed under GPL.

Note: Latest version that works under MacOS X 10.10.x is the v4.1.5

Homepage: https://k1.spdns.de/Develop/Projects/zasm/Distributions/

Project page: https://github.com/Megatokio/zasm

Main features:

• Assemble extended code for the Hitachi HD64180.
• Assemble code limited to the 8080.
• Can compile and include c source files.
• Can generate binary files or Intel Hex or Motorola S19 files.
• Can include the generated opcodes and accumulated cpu cycles and a list of all labels.
• Supports various historically used syntax variants and the syntax emitted by sdcc.
• Supports multiple code and data segments, nested conditional assembly and nested local scopes.
• Supports code and data compression using ZX7, Einar Saukas' 'optimal' LZ77 packer.