https://www.ndwiki.org/index.php?action=history&feed=atom&title=README-DDTREADME-DDT - Revision history2026-05-06T11:52:35ZRevision history for this page on the wikiMediaWiki 1.43.8https://www.ndwiki.org/index.php?title=README-DDT&diff=3644&oldid=prevRoger: Created page with "=DDT= * DEBUGGING. * DISASSEMBLY. * TRACING. Functions to help debug and develop the nd100em has been included in its functionality. This document will try describe how each..."2016-08-13T14:21:15Z<p>Created page with "=DDT= * DEBUGGING. * DISASSEMBLY. * TRACING. Functions to help debug and develop the nd100em has been included in its functionality. This document will try describe how each..."</p>
<p><b>New page</b></p><div>=DDT=<br />
* DEBUGGING.<br />
* DISASSEMBLY.<br />
* TRACING.<br />
<br />
Functions to help debug and develop the nd100em has been included in its functionality.<br />
This document will try describe how each of those subsystems work/dump info and possibly<br />
postprocessing of that and tools needed.<br />
<br />
==DEBUGGING==<br />
<br />
If you set debug=1 in the config file, nd100em will produce a file called debug.log,<br />
where simple information can be dumped out from any routines that need to.<br />
<br />
==DISASSEMBLY==<br />
===Tracing disassembler===<br />
<br />
If you set disasm=1 in the config file, nd100em will internally build a structure<br />
of the running program, so basically it also becomes a tracing disassembler. It tracks<br />
if an address is used as data or code, and tags it accordingly. At the end of program<br />
execution, it will dump this structure into a disassembly file, with extra comments<br />
containing things like what address accessed a data word, labels relative jumps etc.<br />
It currently can only handle code without paging active.<br />
<br />
Output is: <addr> <word> <possible label> <code|UNKN:|DATA:> <comment><br />
<br />
comment field can be: <br />
* From what address was this data accessed<br />
* Alternative interpretion as code instead of data<br />
* To what label this jump goes, note: only tracks first jump<br />
<br />
Some examples of how it might look are:<br />
<pre><br />
005072 044003 UNKN: 'H' % LDA 3<br />
005073 174375 UNKN: % BSET ONE 170 DA<br />
005074 146142 UNKN: 'b' % RADD CLD SL DP<br />
005075 000000 DATA: % 004773 005020 004773 <br />
005076 170420 L00004 SAA 20 <br />
005077 164303 IOX 303 <br />
005100 164313 IOX 313 <br />
005101 164403 IOX 403 <br />
005102 164413 IOX 413 <br />
005103 164433 IOX 433 <br />
005104 044005 LDA 5 <br />
005105 164303 IOX 303 <br />
005106 164313 IOX 313 <br />
005107 164403 IOX 403 <br />
005110 146142 RADD CLD SL DP % L00005 <br />
005111 144004 DATA: % 005104 004703 004714 <br />
005112 000001 DATA: % 000377 005113 <br />
</pre><br />
<br />
and:<br />
<br />
<pre><br />
000340 020040 DATA: ' '' ' % 004476 004504 <br />
000341 047125 DATA: 'N''U' % 004476 004504 <br />
000342 046502 DATA: 'M''B' % 004476 004504 <br />
000343 042522 DATA: 'E''R' % 004476 004504 <br />
000344 051440 DATA: 'S'' ' % 004476 004504 <br />
000345 035040 DATA: ':'' ' % 004476 004504 <br />
000346 023400 DATA: ''' % 004476 <br />
000347 006412 UNKN: % STA ,X ,B 12<br />
000350 044523 UNKN: 'I''S' % LDA ,B 123<br />
000351 020111 UNKN: ' ''I' % STD 111<br />
000352 052040 UNKN: 'T'' ' % LDT ,X 40<br />
000353 040440 UNKN: 'A'' ' % MIN ,B 40<br />
000354 047055 UNKN: 'N''-' % LDA I ,X 55<br />
000355 030460 UNKN: '1''0' % STF ,B 60<br />
</pre><br />
<br />
==TRACING==<br />
<br />
In flux at the moment, so this will be documented later more accurately.</div>Roger