JWasm

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Description

JWasm is a Masm-compatible assembler. It supports 16-, 32- and 64-bit code, instructions up to AVX and various output formats. It's written in C.

93% recommended

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Posted by Serg Stetsuk — 2012-09-26

Very good alternative to masm and tasm in most cases.
Posted by Peter Kuznetsov — 2011-04-11

Great job!
Posted by jj2007 — 2011-03-21

A very good alternative to Masm, and a lot faster. Almost fully compatible, the remaining 0.1% are in the bugs list; before embarking on a bigger project, study that list, although usually these bugs have no relevance for the average user ;-)
Posted by mudingxi chanshi — 2010-03-17

I am starting to learn assemble language,it is the tool that I need.thanks
Posted by Valhalla — 2009-09-01

Excellent alternative for Masm, now it supports 64bit too !
Posted by haunte — 2013-03-11

Great tool. I was finding a compiler for old dos and this works very well. It's good to know this works with x64 as well.

2009-03-08