Jump to content

gogopuffs

6502
  • Content count

    17
  • Joined

  • Last visited

5 Followers

Recent Profile Visitors

137 profile views
  1. gogopuffs

    16MB SIMMs in Mac Classic II?

    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?
  2. gogopuffs

    SE/30 Buying Advice

    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.
  3. gogopuffs

    Quick SE/30 RAM sanity check please?

    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: https://www.18004memory.com/16mb-60ns-fpm-30pin-simm.asp?l3id=842 There's also an eBay ad for them but it's at a higher price: http://www.ebay.co.uk/itm/330590859970
  4. Ahh, yes. But that being straightforward, couldn't replacement ROMs simply be programmed with an ordinary ROM programmer?
  5. Whoa, well done! Was thinking "hey! My work is done!" but I think you were going the other way around and also using the smaller form factor PLCC pinout rather than the SE/30 44-pin PLCC to the SE 28 pinster. Thanks for confirming my theory of swap-eration!
  6. 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. References: 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.
  7. Exactly the one. Wow. Some sadistic chemical engineer from Maxell is laughing still!
  8. gogopuffs

    Replacement 30-pin SIMM Sockets?

    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.
  9. 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. Thanks.
  10. 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.
  11. 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
  12. 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 Thanks!
  13. gogopuffs

    SE & SE/30 Analog Board Cap List

    I would also be very interested in this. I had a pop-fizz-smoke experience with the power supply in a Macintosh SE/30 and am thinking I need to fix that before I try to turn it on again. (It was seemingly working when it popped)
×