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  1. Important Information

    1. The 68kMLA Forum Rules   (10106 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.

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    2. Conquests

      Discuss your latest vintage Mac finds!

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    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.

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  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/

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    2. 68kMLA Wiki

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

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  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

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    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!

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    3. 68k LC & Performa

      Ah, the consumer computers!

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    4. 68k PowerBook

      From the Portable to the 190cs.

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  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

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    2. PCI Power Mac & Performa

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

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

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

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    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

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  6. Everything Else…

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

      Not really 68k Macs, but certainly Vintage!

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    2. Newton

      The best PDA ever finally gets its own forum!

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    3. Software

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

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    4. Hacks & Development

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

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    5. Peripherals

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

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  • Posts

    • Given the kick to the system bus, is it worth upgrading from say a G4 500mhz to a G4 1Ghz?  
    • I'm not sure about the serial numbers, but the Lisa 1 mice had a very narrow button vs the newer ones that were shared with the Mac and Lisa 2's, and also a different DB9 connector hood (no screws). see the photos here: https://www.worthpoint.com/worthopedia/apple-lisa-mouse-a9m0050-early-013519-1863798648   There's a few of these on ebay that are super expensive as well.   There is a formula for the serial number of Lisas that tell you the manufacture date and plant in a document called "Good Things To Know About The Lisa.pdf" from SunRem, but not sure that a similar scheme applies to the mice. It does appear that the newer mice that came with the Mac 128 to the plus had a different serial number scheme than what's on the Lisa 1 mice. And to add more confusion, they all have the same model number.   I wouldn't go by the serial number as much as the shape.  
    • Yep here it is, Technical Introduction to the Macintosh Family p. 227:   ”Note: On the older 400K disk drives, a buffer in RAM (actually the low-order bytes of words in the sound buffer) is read by the Analog Signal Generator (ASG) to generate a pulse-width modulated signal, like the sound signal, that controls the speed of the disk motor. This speed variation is responsible for the characteristic humming of the disk drive. The Macintosh Operating System uses this speed control to store more sectors of information in the tracks closer to the edge of the disk by running the disk motor at slower speeds. On the BOOK drives, the variable disk speed is automatically controlled by the disk drive hardware.”   https://vintageapple.org/macprogramming/pdf/Technical_Instroduction_To_The_Macintosh_Family_1987.pdf  
    • You need to recap it before you do ANYTHING with it period.    These logic boards are known for failing catastrophically with bad caps. Sometimes to the point where you end up the waiting queue for a replacement logic board as a few others are in. 
    • the convergence could have been brought back into alignment much easier by adjusting the H-STAT control on the CRT Neck PCB. 
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