&gt; With regard to patches: I thought there were some non-context variants<br />&gt; of diff.  In that case, even a diff does not include original code<br />&gt; before you patched it.<br /><br />Yes there is.<br />But I actually got new versions of the tms320c54 files from Hex Rays themselves for some bug I reported.<br /><br />I then modified those to add some calypso specific code.<br /><br />&gt; Also, as dieter has indicated, he knows Hexrays well and I think it<br />&gt; should be no problem to get your modifications merged in the next IDA<br />&gt; release and/or published somewhere on their website.<br /><br />Yup most of my modifications should be in the next version, I&#39;ve sent them to Hex Rays.<br /><br /><br />Cheers,<br /><br />    Sylvain