68kMLA Classic Interface

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512k with very unique fan

Posted by: pcamen on 2019-10-17 17:10:58 I got this 521k a few years back from my local Craigslist.  It has a Mac Rescue board in it with an unknown amount of ram.  The fan seems like major overkill; it is massive for the size of the unit - about 4 inches across on the side of the unit.  Here are the pics hosted on my website as the image posting here seems to be broken at the moment.  https://vintageapple.org/pic/512-fan.mov The addition of the plug in for the fan on the analog board seems pretty solid work.  The case mod is a little hinky aesthetically, but otherwise solid.  It is giving me a sad Mac error 020020 - anyone know what that means?

Posted by: Mighty Jabba on 2019-10-17 18:22:09 That is hilarious. Somebody wasn't messing around when it came to cooling. Sorry I can't really help with the error.

Posted by: jessenator on 2019-10-17 19:17:26 That is one big middle finger to Steve Jobs is what that is 😉 Pretty hilarious, but strangely quiet. Must not run at full RPM Address error at F6??? https://udcf.gla.ac.uk/~gwm1h/Error_Codes/Sad_Mac_Codes.html I wish i knew how to read those

Posted by: MOS8_030 on 2019-10-17 19:50:39 That's fan they used because that's the fan they had. 😀

Posted by: dochilli on 2019-10-18 06:46:26 I think that 020020 means that you have a RAM error at location F10. You have to change the RAM chip. Old RAM chips somtimes fail.

Posted by: pcamen on 2019-10-23 09:14:38 Yea, that makes sense.  I think sometimes the SIMM contacts just get a little oxidation on them.  I remember years ago when I would try to fire up my apple II plus when it was 15 or 20 years old, I would have to pull out and re-seat all the chips that were in sockets as they no longer made good contact.  Perhaps it is the same thing here.  I'll give it a shot.  If not, I have plenty of SIMMs to replace them with.

Posted by: pcamen on 2019-10-23 09:46:18 And ... sure enough, that was it.  SIMMs all tested good in my SIMMCHECK and just re-seating them allowed the system to boot.  It has a very bright and crisp screen and 2M ram with the MacRescue.

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