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Posts posted by gogopuffs

  1. I'm finding some exciting interest in this device and the price seems reasonable on eBay.  Was anyone successful in getting a modern firmware, and does it work across a variety of Macintosh video-out formats?


    Thinking in terms of the built-in video of the Quadra 700, PowerMac 8500/8600, Macintosh LC/LCII.  It seems as though my old Dell Television from 2007 won't sync to the Macintosh LC no matter how I set the Sony MacSync jumpers. 



  2. The drive heads could be stuck and that's generally a pretty easy fix.  I had a similar Conner hard drive - if you're careful and take the torx screwdriver to open up the top in a relatively dust-free environment, then plug it in and power it up, you may see that the head is stuck.   You can see an example of this on YouTube here.

    It could also be stiction, which there are other little tutorials.  Would be neat to try and revive the guy. And naturally replace with a SCSI2SD or RaSCSI if you want!

  3. Definitely worth giving the logic board a bath. Some people get testy about boards going in the dishwasher, but I've been very pleased with dishwasher results (please no soap or other dishes) . Scrape that orange barcode sticker (if you feel the need to keep it) in the board corner off if you do any bathing, as it'll likely disintegrate. 


    Washing that case top and bottom (no components when washing them) and carefully wash/clean/lube the floppy drive would give me a lot of hope.


    And sometimes washing actually rehydrates the capacitors enough to bring it (temporarily) back from the dead.  Techmoan shows this phenomenon with his Mac Classic in this YouTube video.

  4. Searched all over the forums and can't seem to find where the actual speaker diameter for the Mac SE case is.  I don't have any calipers or my Mac SE on me, so, I'm having to ask the community (and hopefully help whoever might ask the same question in the future).


    Is it 60mm? 55mm? I have no idea and need your help.


    I'd like to know because I'd like to put in a modern, higher power/wider range speaker into the same slot as I build something usable with the same Snow White industrial design.  


    FYI - it is a Mac SE/30 that is beyond economic repair due to exploding Maxell battery surprise. 




  5. Gang,


    Everyone likes to talk about how the SE/30 can go to 128MB of RAM and is a wonderful flexible machine with the Mac ROMinator II, etc.


    But has anyone tried putting those 16MB SIMMs into the two-slot Classic II logic board? Pushing it to 34MB of RAM would be cool.


    If it's a ROM limitation, though, then I ask - 


    Is there the possibility of a Mac ROMinator III for the Classic II that would replace the ROM chips rather than be simply on a ROM SIMM? (Kind of a later version of the ROMinator I) Steve? Doug?

  6. If they're willing to let you open up the case (long Torx screwdriver, four screws, pretty easy to open up) and inspect the logic boards, then you can determine whether they're worth it or not.


    If the battery exploded and leaked all over the board corroding the circuit traces, it's game over and likely not worth the investment.

  7. I know it's late, but SE/30 (and other Macs using 30 pin memory!) does not care about parity or non-parity memory and often parity memory can be had reasonably cheaply. 


    I bought this and was very pleased at the quality, warranty, and price:




    There's also an eBay ad for them but it's at a higher price:



  8. post-7029-0-47191700-1481640998_thumb.jpg


    See that adapter? Think about it as a little bit of inspiration.


    So, the SWIM chip as we all know is an upgrade to earlier Macintosh SE machines that were equipped with 800k drives and was once an upgrade option for users who want to read and write 1.44MB floppy drives.


    I'm now an owner of a battery-acid-victim SE/30 motherboard and was wondering about what could be used as a donor for other systems.  I am also in possession of an 800k Macintosh SE overseas and was just fantasizing about using the SWIM chip and SuperDrive from the SE/30 in the SE.


    First problem:  form factor. The IWM and SWIM chip in the Macintosh SE is the 28 pin DIP package. Yeah, good enough. Too bad that the SE/30 SWIM form factor comes in a 44-pin PLCC form factor. (square package with pins on all sides vs. rectangle package with pins only length-wise)


    So, looking a little deeper at the documentation referenced below, it seems they are work-alikes, they just need to be wired up properly.


    And possibly it may mean that I need to do a bit of board design to get the right pinouts. This is new territory for me, but nothing's impossible, right?


    So then the living Mac SE gets the SWIM chip in the bespoke cradle in a DIP package, the SuperDrive from the donated SE/30, and a whole new era of parts salvage possibilities comes about. This feels easier than, say, trying to emulate the behavior of a SWIM chip in a programmable package (using a Teensy or similar that's more powerful than the Mac SE itself.. ha!) 


    Assuming the board pinouts were routed appropriately and the thing actually works, I'd imagine this would be useful for people doing resto-mods and retro-upgrades to their Macintosh SE machines.  Donor boards for SWIM chips wouldn't be limited to just SE/30's, they could come from Classic logic boards, IIci boards, etc. 




    http://mirror.informatimago.com/next/developer.apple.com/technotes/hw/pdf/hw_14.pdf Apple Technical Note HW14

    <a data-ipb="nomediaparse" data-cke-saved-href="http://ftp.netbsd.org/pub/NetBSD/misc/wrstuden/Apple_PDFs/SWIM%20Chip%20User"href="http://ftp.netbsd.org/pub/NetBSD/misc/wrstuden/Apple_PDFs/SWIM%20Chip%20User" s%20ref.pdf"="">http://ftp.netbsd.org/pub/NetBSD/misc/wrstuden/Apple_PDFs/SWIM%20Chip%20User's%20Ref.pdf Apple SWIM Chip Reference Guide

    http://www.ccadams.org/se/MacSEservice.pdf Mac SE Service Guide


    Mods - feel free to move this message into a different forum if it's not appropriate - hardware hacks? I dunno. 

  9. In a pinch you can use zip-ties (cable ties) and/or a piece of gorilla tape (or similar) bound against the other SIMMs to keep the tabless SIMM upright and within its slot.  Probably best to get a period-correct SIMM slot if you are wanting an authentic restoration.


    I have a donor SE/30 logic board (battery explosion) that could be used as a donor for your needs. Let me know.

  10. FYI - (dish and others) Soap is a base, which neutralizes any kind of acid that would be active (if there were any left - the battery and its holder were removed if you noticed in the photo).


    Note that the acid basically wore itself out eating up various components and is no longer active. 


    Lots of people use the dishwasher to clean electronics components - if this was a legitimate concern, the practice would not be as popular as it is with many repair communities.



  11. Dang. Sorry to hear the news.


    Well, I've got a mostly happy Mac SE/30 with a repaired Astec power supply (had to replace the input filter caps with modern versions) that does NOT have an ethernet card, which this Mac will donate.  Would it be worth swapping in the Sony power supply from this Mac?


    The external case appearance is in good condition, and even the rusty bits could be sanded down and primed, so it'd be a shame to completely trash the lot.


    Ultimately I guess I'll chalk this up to a slightly expensive and convoluted Ethernet card purchase.  I think I'll throw it in the dishwasher just to see what kind of visual difference it makes - it's already a sunk cost at this point!




    PS - Louis Rossmann doesn't do these kind of oldsters either. ;)


  12. I took a risk on a non-bootable SE/30 in the hopes it was just a dead hard drive.


    Well, the hard drive works. And it came with an Ethernet card. The Sony power supply seems to be working fine, and I would imagine the screen is probably OK too.  


    But sadly, the logic board does not due to a battery acid exploding some time when Michael Jackson was still alive.  And that thing, it caused some of the frame to rust, caused part of the interference-shield cover to get eaten away, and frankly was pretty impressive on how much evil was originally contained in that battery. 


    I thought to take some photos of the damages - you can see traces, metal pins and entire components gone.  I did a light isopropyl alcohol (90%) wash with a brush to get the pileup off of the board, but I'm feeling a bit skeptical about either trying to do further cleanup or whether it's even worth it.


    Pics for highlights - hopefully it's high enough resolution for you to enjoy the carnage and give some feedback.  How much would it cost for me to send to someone who is skilled in fixing these things?


    Also - I have access to an ultrasonic cleaner - I do see professional repair outfits using this to get rid of some of the horrible stuff on boards (water damage, corrosion, etc.) -  I understand the caveats and of course won't even power it up because it's missing so many components anyway - but would it make sense to do that even before sending it out for further repair (or component replacement attempts)?


    Close up of where the battery used to be and the aftermath:



    Corresponding back-side of board - note some pins have corrosion, some seem to be black?



    Some of the hell-slurry flowed down the first SIMM (with seemingly minimal damage) and seemed to pool a little in the corner



    Backside of the pooled corner


  13. So, not sure if anyone actually controls the 68kmla infrastructure around here, but the Certificate just expired on the wiki.  It might make sense to go with the free LetsEncrypt SSL cert and automate the renewal if that helps?


    Subject: wiki.68kmla.org                                                                                                                   

    Issuer: StartCom Class 1 Primary Intermediate Server CA     

    Expires on: Oct 19, 2016          

    Current date: Oct 19, 2016



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