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MediaPortal 1
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<blockquote data-quote="knutinh" data-source="post: 23471" data-attributes="member: 14776"><p>I found the source code for a XP driver for parallel port, setting individual pins to 5V or 0 V. I then "hacked" this so that setting these pins was timed to a 0.6ms clock (using some special windows high resolution timers). I ran a Matlab script doing an exhaustive search through all legal bit inversions (as commands was effectively 12, 15 or 19 bits only), and I observed the behaviour of my Sony surround recevier.</p><p></p><p>Note that a special cable has to be made between the par. port and the serial Sony amp interface with a couple of components (effectively an inverter using a transistor and a resistor).</p><p></p><p>Note also that the commnads are documented, but not in any fashion that I could use. Therefore, I have only found "power on" and "power off".</p><p></p><p>As you can see, this is an experiment close to hardware and realy should be treated as for instance a IR eye/driver by a higher level command and control thing.</p><p></p><p>best regards</p><p>Knut Inge</p></blockquote><p></p>
[QUOTE="knutinh, post: 23471, member: 14776"] I found the source code for a XP driver for parallel port, setting individual pins to 5V or 0 V. I then "hacked" this so that setting these pins was timed to a 0.6ms clock (using some special windows high resolution timers). I ran a Matlab script doing an exhaustive search through all legal bit inversions (as commands was effectively 12, 15 or 19 bits only), and I observed the behaviour of my Sony surround recevier. Note that a special cable has to be made between the par. port and the serial Sony amp interface with a couple of components (effectively an inverter using a transistor and a resistor). Note also that the commnads are documented, but not in any fashion that I could use. Therefore, I have only found "power on" and "power off". As you can see, this is an experiment close to hardware and realy should be treated as for instance a IR eye/driver by a higher level command and control thing. best regards Knut Inge [/QUOTE]
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