Jump to content

Forums

  1. Important Information

    1. The 68kMLA Forum Rules   (10097 visits to this link)

      To quote vintage Apple manuals: "Read Me First!"

  2. Community Connections

    1. General 68kMLA News & Stuff

      What's going down in the barracks.

      3972
      posts
    2. Conquests

      Discuss your latest vintage Mac finds!

      39502
      posts
    3. Trading Post

      Feel free to trade all of your Mac goodies here with all honest intentions. The website provider assumes NO liability, so buyer beware! Please see this topic for more information.

      52978
      posts
  3. Projects & Hosted Forums

    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
      http://retrochallenge.org/

      1486
      posts
    2. 68kMLA Wiki

      The creation and maintenance of the 68kMLA's information repository.
      http://68kmla.org/wiki/

      493
      posts
  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

      45857
      posts
    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

      13028
      posts
    3. 68k LC & Performa

      Ah, the consumer computers!

      7953
      posts
    4. 68k PowerBook

      From the Portable to the 190cs.

      9848
      posts
  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

      2670
      posts
    2. PCI Power Mac & Performa

      The PPC comes of age and adopts the industry standard expansion slot.

      5881
      posts
    3. G3/G4/G5 Power Mac, iMac & eMac

      From the Beige G3 to the quad-core G5, via various iMacs!

      13720
      posts
    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

      8965
      posts
  6. Everything Else…

    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

      7387
      posts
    2. Newton

      The best PDA ever finally gets its own forum!

      1066
      posts
    3. Software

      Includes system stuff, productivity, emulation, design, and games for pre-OS X Macs!

      17461
      posts
    4. Hacks & Development

      Yes, it's back! Hardware hacks/modifications and software development for Mac OS.

      18529
      posts
    5. Peripherals

      Anything you can hook up to your Mac or stuff into it as an interface!

      14519
      posts
  • Posts

    • Thanks for your help on this guys. It's a shame that it isn't easier to send it to the States. 
    • Oh yeah, the fabrication plant I used was able to create proper boards.   I haven't had any problems with reliability.  I've built 8 complete sets of 128MB now, and all have worked fine in my two IIfx testbeds.  It's conceivable that I could have received some on the very low end of the scale at 1.17mm, which would be below threshold.  So far, out of the ones I have built, they are all .050" exactly on the micrometer across the fingers.  I did use 2oz copper, I wonder if that makes the surface copper layers thicker?   About Rominator,  I have 3 of them, and have never had to use tricks to get good contact.  SIMMs should have a tolerance from 1.19 to 1.37.  Standard fabrication tolerance is ±10%, so if BMoW used 1.2mm substrate, he must have received some batches on the bottom of that tolerance scale.  I should measure mine.    
    • This thread has been really interesting.  Thankyou!
    • I posted the test result and the modification method on my blog.The data maybe incomplete, but if you are interested please check it out.
    • Great!  I'm pretty sure the port was originally designed for the 2/5 (hence the "25" in "LISA25.SYS").   This is one of the reasons I get a strong feeling that this wasn't ever really finished; it was a demo platform, rather than a serious port.  Error handling is nonexistent (if you get an abort/retry/ignore prompt and press 'r' for retry, it actually restarts the machine, at least here).  I have found so many ways to crash this so far    
×