is an assembler for the Motorola 6809 and Hitachi 6309 microprocessors.

It reads input from an ASCII text file, assembles this into memory, and then writes a listing and a binary or hex file.

Features of AS09 include: fast two-pass assembly; support for binary, s-records or intel-hex output file formats; optional generation of a debug information file; three segments (code, data, bss) for ROM-based programs; a 'struct' keyword for easy declarations; an instruction cycle count in the listing; full conditional assembly with CPU identifying defines; C-style expressions; support for long file names when running in a Windows DOS box; and full macro capability.

It accepts full 6309 instruction set extensions to the M6809. This can be enabled from the commandline using -x option.

AS09 runs under MS-DOS 3.x+ or compatible systems.


To conclude AS09 works on DOS operating system and can be easily downloaded using the below download link according to Freeware license. AS09 download file is only 60 KB in size.
AS09 was filed under the Assembly Language category and was reviewed in and receive 5/5 Score.
AS09 has been tested by our team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. We will recheck AS09 when updated to assure that it remains clean.

AS09 user Review

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Popularity 10/10 - Downloads - 273 - Score - 5/5

Category: Assembly Language 
Publisher: Frank Vorstenbosch
Last Updated: 03/08/2019
Requirements: Not specified
License: Freeware
Operating system: DOS
Hits: 529
File size: 60 KB
Price: Not specified

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