Package flasm

Flash bytecode assembler disassembler

http://flasm.sourceforge.net/

Flasm is a free command line assembler/disassembler of Flash ActionScript
bytecode. It lets you make changes to any SWF. Flasm fully supports SWFs
produced by Macromedia Flash 8 and earlier Flash versions.

General Commands
Command Description
flasm A swf bytecode assembler/disassembler