<td align="left" valign="bottom" colspan="2"><a class="maintitle" href="viewtopic.php?t=170&start=15&postdays=0&postorder=asc&highlight=">List of known Disk ][ protection schemes</a><br />
<td width="100%"><a href="viewtopic.php?p=814#814"><img src="templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Message" title="Message" border="0" /></a><span class="postdetails">PostΘ le: Mer 16 Jan 2008, 16:01<span class="gen"> </span> Sujet du message: </span></td>
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<td colspan="2"><span class="postbody"></span><table width="90%" cellspacing="1" cellpadding="3" border="0" align="center"><tr> <td><span class="genmed"><b>JPL a Θcrit:</b></span></td> </tr> <tr> <td class="quote">The WP circuitry is activate by voltage of phase 1, for this reason Phases must be off when you write... and of course you can't write and move together. That's impossible, and I don't speak about the difficult to do a tracking of datas if it was possible.</td> </tr></table><span class="postbody">
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Yes, in normal drive you have to turn off stepper phase1 coil before writing, and this makes certain quarter tracks unwrittable, as well as the write during head movement, but .... that's on the stock drive only. For production of copy-protected diskettes this constraint is easily removed.
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@JPL, what do you have in mind with "the LSS is a little upset when it believes the disk is protected"?
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@Toinet: thanks in advance, that will be nice practical example.</span><span class="gensmall"></span></td>
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<td width="100%"><a href="viewtopic.php?p=816#816"><img src="templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Message" title="Message" border="0" /></a><span class="postdetails">PostΘ le: Dim 20 Jan 2008, 19:32<span class="gen"> </span> Sujet du message: </span></td>
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<td colspan="2"><span class="postbody"></span><table width="90%" cellspacing="1" cellpadding="3" border="0" align="center"><tr> <td><span class="genmed"><b>vladitx a Θcrit:</b></span></td> </tr> <tr> <td class="quote"> </span><table width="90%" cellspacing="1" cellpadding="3" border="0" align="center"><tr> <td><span class="genmed"><b>JPL a Θcrit:</b></span></td> </tr> <tr> <td class="quote">The WP circuitry is activate by voltage of phase 1, for this reason Phases must be off when you write... and of course you can't write and move together. That's impossible, and I don't speak about the difficult to do a tracking of datas if it was possible.</td> </tr></table><span class="postbody">
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Yes, in normal drive you have to turn off stepper phase1 coil before writing, and this makes certain quarter tracks unwrittable, as well as the write during head movement, but .... that's on the stock drive only. For production of copy-protected diskettes this constraint is easily removed.
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Yes you're absolutly right, you can write anything with an other system but the problem is that you must be able to read with a standard disk II..
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<td width="100%"><a href="viewtopic.php?p=835#835"><img src="templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Message" title="Message" border="0" /></a><span class="postdetails">PostΘ le: Mar 29 Jan 2008, 2:39<span class="gen"> </span> Sujet du message: </span></td>
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<td colspan="2"><span class="postbody"></span><table width="90%" cellspacing="1" cellpadding="3" border="0" align="center"><tr> <td><span class="genmed"><b>JPL a Θcrit:</b></span></td> </tr> <tr> <td class="quote">the phase 1 send a signal for WP but it's on the same circuit as
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the write signal... and of course the head can't write correctly and for the
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reading it's same the pulse can't be received correctly.</td> </tr></table><span class="postbody">
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WP circuitry (phase1=off + notch present) on the analog board inhibits the drivers for erase and r/w coils, but a single resolder hack will fix the dependency on phase1=off for writing on quarter tracks. Other than that, I don't see any problems.
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As to LSS (the controller FSM), it's connection with WP is only shifting the bit right in one of the modes.</span><span class="gensmall"></span></td>
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<td width="100%"><a href="viewtopic.php?p=838#838"><img src="templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Message" title="Message" border="0" /></a><span class="postdetails">PostΘ le: Mar 29 Jan 2008, 14:06<span class="gen"> </span> Sujet du message: </span></td>
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<td colspan="2"><span class="postbody">Yes absolutly but you must never forgot that the protection must work on a standard drive ... without hack system <img src="images/smiles/icon_confused.gif" alt="Confused" border="0" /></span><span class="gensmall"></span></td>
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<td align="right" valign="top" nowrap="nowrap"><span class="gensmall">Toutes les heures sont au format GMT + 1 Heure</span><br /><span class="nav">Aller α la page <a href="viewtopic.php?t=170&postdays=0&postorder=asc&start=0">PrΘcΘdente</a> <a href="viewtopic.php?t=170&postdays=0&postorder=asc&start=0">1</a>, <b>2</b></span>
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