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Talon
Account closed
Registered: May 2007
Posts: 11 |
Replacing sid/vic, version question
Aloha!
I currently have four C64 (of which one is a C64c) in my home. Yesterday, the last functional one broke (only shows a reset-y screen with no characters on it on startup).
The C64c's keyboard is broken, but I connected one of the other keyboards to it so that works. But the 6581 in it seems to be dead too!
Do you guys know if it would work stealing a 6581 from one of the older machines? I remember one of them sounding especially nice - it has a 6581 from mid 1983 in it (the so called "6581, revision 3"). The C64c has an 6581 revision 5 in it (8580R5). If it's an OK operation it will just have made the C64c sound better :)
Apart from that, have anyone of you experienced the failure I described at the top (unresponsive screen without text, looks like 38 columns or so)?
Maybe I could just as well steal a working vic chip instead, and fix that machine? Or does it seem more of a CPU thing? Crappy error description from me I suppose - maybe you can ask me some good questions about it if you care to help.
I haven't been much of a hardware guy till now, but since I now have 4 malfunctioning vintage computers it might be time to get a soldering gun and have a go :)
Best
/T |
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Frantic
Registered: Mar 2003
Posts: 1641 |
Speaking of proper PSU's.. Are they for sale somewhere? |
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Cresh
Registered: Jan 2004
Posts: 354 |
http://www.lemon64.com/forum/viewtopic.php?t=27552&postdays=0&p..
There's a business to do. |
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ready.
Registered: Feb 2003
Posts: 441 |
I have seen some on Lemon forums some months ago, but there were several design flaws for being a commercial product. Actually it seems that nobody dares to sell a heavy duty PSU mainly for the legal risks of selling potentially dangerous hardware units.
So far I have built my own. I made plans for selling kits so that anyone could build their own, but I got stuck with other real life issues (family, house, ...). I can provide you the schemes and give support in case needed. My PSU has worked well for over 1.5 years so far. |
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Devia
Registered: Oct 2004
Posts: 401 |
Quoting Creshhttp://www.lemon64.com/forum/viewtopic.php?t=27552&postdays=0&p..
There's a business to do.
..there's definately a lot of bullshit in that thread.
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ready.
Registered: Feb 2003
Posts: 441 |
Quote:Quoting Cresh
http://www.lemon64.com/forum/viewtopic.php?t=27552&postdays=0&p..
There's a business to do.
..there's definately a lot of bullshit in that thread.
actually that seemed to me the most serious and technical thread of all PSU threads in Lemon. It provided lots of technical details and "numbers" (voltage ripple, protection devices, harmoincs, efficiency,...).
While other PSU threads just claimed the PSU under examination worked like charm, but without any proof.
Still all threads were far from providing a product for sale, but just concept prototypes. Most projects lacked for example pass-throu cable glands, and so on... |
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Devia
Registered: Oct 2004
Posts: 401 |
Ok, maybe i didn't read the ENTIRE thread... from what you say i should read through the bullshit and focus on the facts I apparently missed... Will do :) |
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ready.
Registered: Feb 2003
Posts: 441 |
@Devia: forums should have the "bullshit filter ON/OFF option" :)
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taper
Registered: Dec 2001
Posts: 119 |
Doc's Hardware Kiste sell good and reliable heavy-duty PSU's. You can have it tailor-made, in case you want to power several c64's, c128's and/or drives at the same time.
It's not cheap, however. But I bought one for Antidote a few years back, and it has worked very well for me.
If you don't want to build one yourself, I recommend that you visit http://www.docshardwarekiste.de/ and throw Doc a mail! |
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Frantic
Registered: Mar 2003
Posts: 1641 |
@Taper: I contacted this company and, unfortunately, he replied that he no longer has the time required to build these PSU's. Sigh... The quest continues! |
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taper
Registered: Dec 2001
Posts: 119 |
Damn... perhaps it depends on how thick bundle of $$$ you wave infront his nose though...
Until we find someone else who do provide heavy duty PSU's, I suggest people mod a C128 PSU in the meantime. It's easy enough, even I can pull it off. :) And it will save you precious hardware! The old c64 brick PSU's is like playing russian roulette, I tell you! |
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