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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Dazxy2001 on December 19, 2011, 09:06:21 PM
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I have come across this mentioned before, but how feasible is it ?
I have a very yellow A1200 and a reasonable looking A500+ which has a bit of battery damage to the motherboard and some surrounding components unfortunately. The A500+ itself is unexpanded except for a SupraRam 2MB side cart, I was thinking about putting the A1200 motherboard along with a new A1200 keyboard into the case.
The ribbon cable on the keyboard, is this long enough to reach the interface on the motherboard once rehoused ? what with the case being a bit wider.
I will be looking to install a slimline DVD along with a 4 Way buffered interface, most likely an accelerator of sorts and CF adapter or hard drive.
Also due to my non usage of the serial port for anything other than a midi interface I am thinking about integrating it into the case also ala Atari as it connects using a ribbon cable so will be reasonably descreet at the rear.
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Photon did one
http://eab.abime.net/showthread.php?t=60764
I did one
http://eab.abime.net/showthread.php?t=30723
Judge for yourself?
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Thanks for the links, I will have a read through :D
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So Im guessing that the original A500 keyboard would need to be reused and wired into the A1200 motherboard..
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Yeah, real easy to do too. The 2B motherboard has solder pads for the signals (the signals are not in the same order as on the a500 mobo), older boards require you to solder to the legs of the CIA and keyboard MCU.
http://eab.abime.net/showpost.php?p=697675&postcount=7
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Yeah, real easy to do too. The 2B motherboard has solder pads for the signals (the signals are not in the same order as on the a500 mobo), older boards require you to solder to the legs of the CIA and keyboard MCU.
http://eab.abime.net/showthread.php?t=54550
http://eab.abime.net/showpost.php?p=697675&postcount=7
Cheers :) The first URL was invalid but the second one Ive bookmarked
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I was reading another post with regarding to repairing a ribbon... what do you reckon to splicing two ribbons together to give an extension and using silver conductive paint to complete the join ?
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Cheers :) The first URL was invalid but the second one Ive bookmarked
I revised the posting behind the second URL. Seems the first link actually went to an old post of mine that I had deleted as redundant. Ah well, all the info has been copied to the sticky post now.
I was reading another post with regarding to repairing a ribbon... what do you reckon to splicing two ribbons together to give an extension and using silver conductive paint to complete the join ?
You will get an unreliable keyboard.
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Agree with Jope. Or at least, I gave conductive paint a try on my A600 keyboard, and it was unreliable. In that case, I solved the problem (chafed off copper strip ends) by cutting 1cm off the ribbon and removing 1cm plastic.
It's not so hard to do Jope's keyboard circuit mod, that's essentially why I gave this A1700 idea a go in the first place!
And if you have a soldering station, it's pretty easy to get some thin wires on the keyboard chip and connect them to an 8 pin connector which just plugs into the A500 keyboard connector.
For me, the only problems were
1) case bottom sagging after dremeling it (RF shield risers etc) flush. Solution: an extra rubber foot on the underside.
2) I wanted my Apollo 1260 to have the full 64MB of RAM, which made its tilted 32MB SIMM hit the keyboard. It must not touch the SIMM. Impossible to solve. My "solution" was to put spacers to lift the keyboard, and pretend there isn't a tiny gap between case halves on the side.
Eternal truth: "All hardware mods are smooth sailing until you try to close the case." :p
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Wouldn't "retr0brite" be less trouble vs. all the modding (unless more than the yellowing is the problem) ?
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Hardly. A500 cases are almost always more yellowed than A1200 cases, and both A1200 mobos and cases can be bought in as-new condition on amigakit.com. So :)
In my case, I could finally fit the full 64MB of my 68060 card and put it inside a case. Part of the decision was also to get rid of the n-key rollover limitation/bug of the A1200 keyboard/controller. (I type very fast, so it irritated me all the time.)
You can fit more, like a bigger, quieter fan if you have an accelerator. It's mainly a novelty mod, but for me it allowed me to put everything I wanted inside an all-in-one demoparty computer.
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...and both A1200 mobos and cases can be bought in as-new condition on amigakit.com. So :)
"As-new" A1200 cases + mobo's from Amigakit?! I couldn't find it on their site. Can you profide me with a link, please?
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@ Photon
No? I thought so, because they haven't any! Do your homework better next time! :rtfm: