ビデオの概要

はじめに

タイムトラベラーの夢に一緒に加わりませんかー深淵で明晰、ジョージ・オーウェルの”1984年” を象徴する希望と恐怖、ノスタルジアという時代です。今年(2014年)はMacintosh発売から30周年を迎えるにあたり、Macintosh 128Kの分解を行います。そして予想通りーこの分解ではMacintosh をベルリンの壁のように崩壊させましょう。

Cult of MacThe Vintage Mac Museum(ビンテージMacミュージアム)からの詳細な情報も加えて、過去の楽しい情報をお届けします。Cult of Macから、修理ガイドを作成してもいいけれど、ビンテージMacintoshは傷一つつけてはならないとお達しがありました。ご安心ください、これから分解するこの128Kは既に使用不可の状態です。

FacebookTweetsTweet 日本語版Instagramをフォローして、タイムリーな最新情報だけでなく、ノスタルジアな気持ちにしてくれる情報も入手しましょう。

素敵なMac 128Kの壁紙が欲しいですか? ここからダウンロードできます!

この分解は修理ガイドでは ありません。 お持ちのMacintosh 128Kを修理する際は、iFixitの修理ガイドをご利用ください。

  1. オリジナルのMacの小売価格は当時$2,495もしましたー現在の価格に換算すると、なんと$5,594.11(約611,000円/18年5月)になります。これほどの大金を注ぎ込んで、一体何が手に入ったのでしょうか?
    • オリジナルのMacの小売価格は当時$2,495もしましたー現在の価格に換算すると、なんと$5,594.11(約611,000円/18年5月)になります。これほどの大金を注ぎ込んで、一体何が手に入ったのでしょうか?

      • 8 MHz Motorola 68000プロセッサ

      • 128 KB DRAM

      • 9インチモノクロCRTディスプレイ、解像度512 x 342 (72 dpi)

      • 外付けシングルモデルの3.5インチフロッピーディスクドライブを付けると全容量400 KB

      • シングルボタンマウスと頑丈なキーボード

    • この80年代のお宝が目の前にありますが、実は私たちは1円たりともお金を払っていません。この製品は特別にVintage Mac Museumから貸与されたものです。本当にありがとうございました。そしてCult of Macはこの分解になくてはならない80年代の雰囲気を盛り上げてくれました。

    The mac could support more than 2 colors (grey for example)

    Lucas Hoekstra (Lucas9810) - 返信

  2. このタイムカプセルを開ける前に(このTime Capsuleではありませんよ)、この30年間でどれほどテクノロジーは進歩したのかじっくりと見比べてみましょう。
    • このタイムカプセルを開ける前に(このTime Capsuleではありませんよ)、この30年間でどれほどテクノロジーは進歩したのかじっくりと見比べてみましょう。

    • まず最初に84年のMac128K は512 x 342解像度で9インチCRTディスプレイを搭載しています。そしてモノクロです。右側は比較モデルのLate 2013 iMacです。21.5インチ、解像度1920 x 1080ピクセルで何百万色に対応しています。そういえば、オリジナルのiPhoneは解像度 320×480ピクセル、163 ppiでした。

    • Appleはデータ転送のスピードが20 Gb/sのThunderboltを世界に広めようとしています。振り返ってみると、当時は何十億というレベルからは程遠く、高速シリアルポートが何千というBPSのデータ速度を可能にしました。

    • 少なくともAC プラグだけは昔も今も同じですよ。

    Not true -- the serial port was RS-422, supporting much faster speeds

    Joel Finkle - 返信

    RS-422 was introduced with the Macintosh Plus. It was not on the Mac 128 or Mac 512.

    Tom Schmidt - 返信

    Incorrect - RS422 was there from the beginning - perhaps you are thinking of the DIN-style ports, which did indeed come in with the Mac Plus.

    JohnC -

    No, JohnC is correct.

    MCA -

    You're typing: "The quick brown fox jumps over the lazy dog"

    Chris Reites - 返信

    As a 128K Mac owner from 1984, I can confirm that it had two 9-pin RS422 ports from the very beginning.

    Ted T - 返信

    I pulled the storage box containing my old documentation for the Mac 128K and Mac 512k, and they confirm that the serial ports were RS422. The Mac 128k in the garage also with the keyboard, now if I can just find the mouse...

    John - 返信

    Hey, you forgot to include discharging the high voltage cap!

    Fred Torres - 返信

    My neighbor Fred, of Fred's Retort, took apart my 128 to upgrade it to 512K! With an external floppy disk, I was in Hog Heaven!

    Dave - 返信

    What? No case cracker or CRT discharge tool? Those were essential tools for cracking open a classic Mac back in the day. Especially the discharge tool, used to prevent you from finding out why they call the black box at the end of the anode lead to the CRT a 'flyback' transformer.

    http://www.pcmag.com/encyclopedia/term/3...

    johnhutchens - 返信

    That power supply board wasn't the same design as the first 128k Mac boards. the first design had a tin shield on the entire inside edge of the power supply board to keep the board from flexing. The first design flyback transformers were about 1/2 the size as the one in the picture. I have soldered probably 1000 Mac 128,512 and Plus power supply boards after replacing the flyback transformer and all of the caps as the ones Apple used were not long life rated and failed frequently in the early macs

    derwurst - 返信

    The RS-422 chip had support for two ports, and would also drive RS-232 (which is unbalanced, whereas RS-422 is balanced). But Apple "stole" one of the control signals, making it a bit hard to work with standard modems of the day. You needed a hacked cable that worked around the issue (the missing one was RTS/CTS, I think).

    And what was the missing signal used for? Why, that was where the mouse signal went - one port had the X-axis, the other one had the Y-axis. These were hardware interrupts so mouse tracking was very good.

    vpndev - 返信

    • 30年間にも及ぶコンピューターの進歩は周辺アクセサリにも劇的な変化を及ぼしました。キーボードやマウスは今や薄型ボディのワイヤレス仕様で、分厚い黄色のメタル素材は使用されていません。

    • そして今、キーボードには矢印→のキーがあります!典型的なAppleのデザインでは、矢印→のキーが無く、当時奇妙な新アクセサリーであったマウスを使うしか方法がありませんでした。

      • Cult of Macのコメント: このデザインはしばらく継承されました。Appleは1998年に発売した初代iMacでSCSIとシリアルポートを廃止し、USBを導入しました。

    • 2つのモデルを並べて比較してみました。シングルボタンの音声コマンドデバイスと、もう一方はマジックのように指先のジェスチャーテクニックにも対応するワイヤレス入力デバイスです。

      • 技術的な情報として、ボックス型のマウスはApple Mouse II、モデル番号はM0100です。Dタイプ超小型シリアルポート(正確にはDE-9)対応。滑らかな卵型のマウスはMagic Mouseです。

    The yellow is because of UV rays reacting with bromide-based flame retardants added to the plastic. Until 87, Macs and peripherals were a putty color.

    Jerri Kohl - 返信

    • さてモデル番号に移りましょう。Macintosh Model M0001です。(Appleは将来にわたって最大10000台モデルを発売できるように番号付与の枠組みが作られています。)

    • この歴史を感じる製造ラベルには悲しいお知らせが記載されていますーその昔、Appleの若かりし頃でさえ、自分で勝手に修理しないでくださいとユーザーに警告しているのです。

      • まさにここからー修理する権利を勝ち取るまでの挑戦が始まっているのです。

    • FCCラベルには真剣な面持ちで次のように表記されています。”もしお持ちのMacを自分で修理されると、お住まいの地域の無線妨害につながります”。(もしこの妨害が真実ならば、1984年にインターネットの音楽配信サービスは存在しているはずがありません。)

    Back in the day, "No user-serviceable parts inside" was a warning to older people that this was not a vacuum-tube device, and if it stopped working, you couldn't simply pop it open, pull the tube, and take it down to the drugstore's tube tester.

    Mark - 返信

    Made in USA, now those were the days!

    Clayton Fraga - 返信

    During POST it would sit there with a totally gray screen.....

    But the mouse cursor still worked beautifully.

    No driver...no OS loaded...the mouse just worked.

    cns - 返信

    I just bought one with the same problem. I intend to come back and tell you how I fixed it.

    Jerri Kohl -

    • このMacが製造された当時でも Pro Tech Toolkitは変わりがありません。必要なツールは全てここに揃っているのですー昔も今も、そして未来も。

    • 私たちのツールを延長すれば、ケース奥深くに留められたT15ネジも外せます。

    • この形状通り、Appleはネジを隠しています。このモデルではバッテリードアの下に隠れていますが、私たちはネジを簡単に見つけました。さて、ネジが外れました。ここから過去を探るため、スパッジャーを侵入させていきましょう。

    • Cult of Macのコメント:幸いなことに、この時代のMacは接着剤が使用されていませんーそしてユーザー自らが交換可能なバッテリーを搭載していました。

    Simply backing out the 2 recessed screws about half way and then pinging the handle of the driver is the easiest way to "crack" the case open

    egrau - 返信

    By the time the Mac Plus came out with user-replaceable SIMMs, vendors like TechWorks were bundling the a cheap Torx T15 wrench with your RAM. Also, anybody remember Larry Pina's Macintosh Repair & Upgrade Secrets? Man, I had to resolder plenty of cold solder joints on analog boards. Such a great feeling getting those machines running again.

    Darryl - 返信

    A couple of things I remember: If you went to Home Depot, you could find a clamp with a thin plate ends that would fit in the groove around the back case, and all you had to do was squeeze the clamp (i.e. open the clamp) and glide it around the groove until the case popped open. Much easier than trying to use a spudger (or, like many of us, marring the case with a screwdriver). On the analog board, the 4 pin molex plug was the frequent overheating spot. It drove the high voltage into the CRT and the heat would melt the solder and subsequent cooling would cause a cold solder joint, which meant your video would go in and out, and whacking it on the side sometimes restored it.

    owen - 返信

    One point to remember when disassembling a compact Mac: If you've installed the "Reset/programmer's buttons" over the vents at the bottom side back corner, you should pop them out before removing the case back. Otherwise, they'd tend to snag on the motherboard back plate. The buttons provided a way to reset the Mac without having to turn it off. There was also a NMI (non-maskable interrupt) button that could be useful for programmers (like a hardware ctrl-C to break into a hung program).

    cityzen - 返信

  3. We included an upholstered desk chair in our teardown/upgrade tools for classic Macs: at least the first time you cracked the case of one. Take out the screws, hold the Mac screen down over the chair, and shake. You could also buy a special Mac cracking tool that looked like a cross between a pair of pliers and a door hinge.

    Matt Mitchell - 返信

    Try find out and recognize all the names. :) All those who signed here are pioneers of personal computing and deserves some special remembering.

    xcvista - 返信

    • さて、私たちは許可されたエンジニアだけが立ち入れるエリアにいます。そしてディスプレイの微調整をする精密電位差計(ポテンシオメーター)を発見しました。

    • 古き良きCRTは修理を配慮した構造でしたー言い換えると、狭いスペースに詰め込まれた今日のフラットパネルスクリーンに比べると格段にアクセスしやすいものです。しかし高電圧のため、誤操作すると非常に危険です。

      • CRTガラスの鉛(Pb) は危険レベルです。

    • 現在と過去のご対面です。もし双方のモデルがあと30年間生き残れたら、次の未来に出会えるでしょう。

    コメントを追加する

    • CRTとキャパシタの間にある、まるで不発爆弾のような電源の接続を外します。

    • Appleは外側ケースにトルクスネジを使用して、出来るだけユーザーの手がMacintosh内部に侵入することを拒みました。しかし、一旦内部に入ると、プラスネジ、マイナスネジなど様々なネジが混在しています。

    • Cult of Macのコメント:iMacよりも128K Macを解体する方が断然楽しいです!

    Hey!!! You have to discharge the CRT! 1,500 Volts!!!. This is a big deal!

    Also, after discharging the CRT, you want to pull the CRT socket cable (That white disc) off of the CRT because if you bump it, you'll snap off a bit of glass on the end of the CRT and that will be all for that CRT.

    scottrlindsey - 返信

    I can attest to this. I snapped that bit of glass off a Mac Plus while the customer was waiting for a RAM upgradge. Doh.

    Kevin Becker - 返信

    • Mission Impossible のテーマソングに合わせて、パワーサプライを素早く安全に取り出します。感電死したテクニカルライターはいません…今のところ。

    • この60WのパワーサプライはAppleのパーツ番号630-0102です。

      • コンピューターとCRTディスプレイ全体に60Wのピーク電流とはかなり素晴らしいと思います。

    • iMacは186Wのパワーサプライで、128Kと比べるとかなり小さいプリント基板です。

    The board on the right is more than just the power supply: it's called the "Analog Board" and includes a fair amount of the video circuitry (don't remember if there's any audio stuff on there)

    Joel Finkle - 返信

    That's not just the power supply -- it's the high voltage, deflection, and video drive circuitry for the CRT.

    (...and audio amp, and speaker...)

    Mark Spaeth - 返信

    The good news is that if you could take a battery from one of Apple's newer laptops (say, perhaps the last Macbook with a user-replaceable battery), wire it to the Macintosh, and get as much battery life as the laptop. Or perhaps much more since you couldn't actually use the old computer for much.

    JM Palacios - 返信

    I have the common components (mostly caps) and a flyback tranformer, repair kit for a mac plus analog board still on hand. Use to repair these all the time.

    egrau - 返信

    It's probably a good place to point out that the 128, 512, and Plus all shipped with no fans. All part of Steve Job's obsession with silent machines no matter how it harmed the hardware. There were many ways available to get Fans into the case. Kensington had a device that slid into the handle that was both power supply and case fan. Some of the various interior upgrade cards came with little internal case fans.

    Jenevieve DeFer - 返信

    • 最優秀テクノロジー賞はMacディスプレイに贈られます。この巨大なCRTは今日の超薄型Retinaディスプレイが作り出すグラフィックスにくらべると程遠いクオリティです。

    • 真空管と偏向コイルの中にある頑丈で分厚い鉛の塊であるこの電子銃は80年代の象徴です!

    • Cult of Macのコメント:オリジナルのMacintoshは1bitのモノクロディスプレイでしたが、WYSIWYG (What You See Is What You Get:見た通りのものを得ることができる)がもたらすグラフィックとデスクトップパブリッシングの革命時代が幕開けしたのです。

    コメントを追加する

    • 30年前でも、Appleは綺麗に整列された内部デザインを採用していました。若干力がいるものの、基板がトレイからスライドして取り出せます。

    • このMacには冷却システムがありません。Motorola 68000には若干の換気スペースがあるものの、それだけです。

      • 68kと呼ばれるこのプロセッサは驚くほど人気のあるチップです。Macintoshだけでなく、Sega GenesisCommodore Amiga, Atari STTI-89グラフ電卓でも使われています。

    • Cult of Macのコメント:68kはAppleのMacintoshの先駆けモデルであるLisaにも搭載されています。

    Don't forget, the m68k was in the first Palm PDAs! (For roughly a good decade, too!)

    Donald Kirker - 返信

    Been awhile since I checked the specs, but I'm pretty sure my TI-89 has more RAM and power than this Mac!

    JM Palacios - 返信

    You wrote, "Even 30 years ago, Apple had a thing for tidy packaging." While that's true, Apple's tidy packaging dates back at least to the Apple II. It had a compact (for its day) switching power supply, the motherboard layout was super clean (the Apple I mobo also had a neat layout), and don't forget the sleek plastic case.

    John M - 返信

    • Mac 128Kの基板には注目すべきチップが搭載されています。

      • Motorola MC68000G8マイクロプロセッサ

      • Fairchild Semiconductor 74LS393 ビデオカウンタ

      • Micron 4264 64 kb RAM (64 kb x 16 chips = 1024 kb, or 128 KB)

        • 128Kという名称はこのアップグレードできないRAMアレーから由来しています。所有者たちはもっとパワーが欲しいと願うことを期待して、Appleのエンジニアたちは密かに512KBバージョンの基板も製造過程でデザインしていました。実際、128Kの発売からわずか9ヶ月後に、512KBモデルが発売されました。

      • Simtek C19728とC19729 32 KB ROM (32 KB x 2 ICs = 64 KB)

      • Simtek 344-0041-A "Integrated Woz Machine" ディスクコントローラー

      • ZilogZ8530PS Serial Communications Controller

    In fact, hobbyists and renegade repair shops would field-upgrade 128K machines to 512K by piggybacking additional RAM atop the existing chips.

    Joel Finkle - 返信

    Yup! A friend of mine (a former Cray field tech!) did that to my 128, giving me a cheap double-your-RAM upgrade!

    Dmitri Fetisov - 返信

    I had a floor model which I believe was first week's production. In Jan 1985, a RAM upgrade cost ~$750 but by December, that had fallen to $75--if you wanted to solder it in yourself. I got mine from MacMemory--and I got a long Torx screwdriver from them also. I snipped off the old ram and sucked out the old solder. I had the option of soldering in chip holders or soldering the RAM in directly, and I chose to do it directly--it had to be fast and precise because the circuit board was four layers thick and you couldn't overheat the chips. You have no idea what a wonderful feeling it was when I turned it on, a smiley face appeared and it went dong!

    Clyde Kahrl - 返信

    What the article doesn't say is who the secret of upgradablity of the MAC motherboard was for (who they had to keep it secret from), Steve Jobs. He forbade them from making the motherboard upgradable. They had the last laugh though. The row of platethroughs next to the processor can have a small board soldered into it with one IC on it. A 74S158 if I remember. You could then unsolder the 64K chips and put in 256k chips. I remember doing this to a hackintosh I made way back in 1986.

    This lack of upgradablity/reparablity pervaded almost everything Jobs built. I think he was offended by the idea that anyone would want expand (this would mean they were not adequate) or alter his perfect creations.

    Walter Peterson - 返信

    Re: Mac 512K upgrades. At the time I worked for a semiconductor manufacturer so getting the necessary 74S157 and 16 ea 256Kx1 DRAMs was fairly easy. Finding the correct Torx driver was the bigger challenge.

    Friends would bring their 128K Macs over and in two hours had a 512K Mac ... and I had $200 in my pocket. Big money back in 1984!

    Phil Wood - 返信

    I didn't own a mac 128 but I did have a couple of Macintosh Plus machines. When I opened one up, I was driven to ask why it was called "Plus" rather than "Minus." Because it was minus a disk controller, minus video hardware, minus anything but the simplest audio hardware, minus any kind of expansion bus other than SCSI. All this "hardware" was actually emlulated in software at boot time by the CPU.

    While this is quite a tribute to the abilities of the 68000 processor, the task of creating and maintaining all this phantom hardware meant there wasn't much left for actually doing work.

    I had to wonder why this machine cost so much when it had so little inside it. This, together with the intentional lack of upgradeability, epitomises the Jobs world view which influenced everything Apple did, even up to today. The amazing thing to me is that so many people seem to be ok with this.

    freddyzdead - 返信

    Not marked as "notable", but very important are the 6 HAL (Hardcoded Array Logic) chips, at D1, D2, D3, E1, E2 and E14. IIRC it was the first time these chips were used in a desktop computer; they were responsible for coordinating all the CPU, RAM, ROM and peripheral timing and decoding, and for potential cloners they were harder to reverse-engineer than standard TTLs.

    rainer - 返信

    • ここには何があるでしょうか?

    • 答えは、新テクノロジーを牽引していた3.5インチのフロッピーディスクです。5.25インチフロッピーディスクは過去のものとなりました。

    • Cult of Macのコメント:Macintoshは前モデルLisaに搭載されていた"Twiggy" と呼ばれる5.25インチフロッピーディスクでこの128Kを発売するところでした。しかし、絶妙なタイミングでSONYが3.5インチドライブを発売したのです。そのため寸前で、3.5インチに変更しました。

    And a box of 10 of these retailed for $50, if you could even find them in the early days.

    Joel Finkle - 返信

    They were extremely expensive. Fortunately, HP were using the same drives in some of their systems. I was able to persuade a friend who worked at HP the buy a case of floppy disks (10 boxes, each box containing 10 floppies) at the employee discount price of only $290.

    John -

    You can actually see that the opening in the front of the metal frame, through which the little 3.5" drive pokes, is designed for the full width 5.25" Twiggy floppy mechanism. Strangely this extra wide opening in the frame survived several original Mac redesigns, and was present in the SE series, and the Classic series of compact Macs for almost 10 years.

    MinerAl - 返信

    • カチカチカチカチ……

    • ある人はこれほどメカニックなキーボードがカチカチと音を立てるほど心地良い音はないと言います。

    • それはさておき、このビデオでタイプしている内容が分かったかたは、懸賞として便利なポケットサイズのバッテリー取り出し用ツールを差し上げます。

      • 当選者発表です!ユーザー名vwlou89さんがコードを解明しました。郵送で懸賞をお送りします。

    The quick brown fox jumps over the lazy dog.

    vwlou89 - 返信

    You got it! Congrats, vwlou89, we'll get your prize out to you ASAP :D

    Andrew Optimus Goldberg -

    The Quick Brown Fox Jumps Over the Lazy Dog

    Ben Chernicoff - 返信

    Jackdaws love my big sphinx of quartz!

    Dmitri Fetisov - 返信

    In the video you guys are typing: the quick brown fox jumps over the lazy dog

    dave - 返信

    Thank you for the video and Audio. Music to my ears!

    chuckmcmillen - 返信

    Does anyone have an extra keyboard cable or could you lend me yours, so I can scan it and make a 3D copy of the jacks. I need to get my old Mac up and running again (@vassko)

    Vassil Mladjov - 返信

    I have a good supply of brand new Mac 128K-Plus keyboard cables. But they are Platinum in color, for the later version of the Plus model.

    Raymond Flowers -

    You can crimp your own; just crimp one of the standard RJ9 connectors upside down from the other, producing a "straight through" cable.

    Tom Spindler -

    • 数本ネジを取り外すと、キーボードの内側を眺めることができます。

    • しかし、それ以上のレベルは検証できません。各ボタンは基板に半田付けされているからです。

      • Cult of Macのコメント:キーボードケーブルは標準のRJ9 ハンドセットコネクタ(4P4Cモジュラープラグ)が使用されていますが、ピンタイプが異なります。ということは通常の電話用コードでは代用できません。

      • 電話とコンピューターの奇妙な融合はもう二度と目にすることはありません。(といいつつ、現在の私たちの周りには融合されたものが多くあります)

    The keyboard key-switches were not that hard. Apple Service taught key switch replacement as part of Apple //e certification.

    chuckmcmillen - 返信

    • さてマウスの解剖です!ご心配なくーこれは高校の生物学授業で経験したものよりももっと人道的なものです。

    • ひねるとすぐに目の球が飛び出します。

    • 内部を開口すると、大量のプラスチック製内臓がでてきます。2つのクワッドラチャエンコーダと幾つかある抵抗器。驚くことに、確認できるのはこれぐらいです。

    • このシンプルなデザインによって、コスト低下につながりました。マウスから複雑な電気回路を取り除いたことでシステムの信頼性が向上しました。今後しばらく続く、安価なデスクトップ用マウスの布石を敷いたのです。

    コメントを追加する

    • Macintosh 128Kの修理難易度は10点満点中7点です。(10点が最も修理しやすい指標)

    • 一度内部にアクセスできれば修理は簡単で、フロッピードライブ、電源、基板やCRTディスプレイなどの主要なコンポーネントは交換できます。

    • 接着剤が使用されていません。

    • ユーザー自らが交換できるバッテリー搭載。

    • 限定付きでアップグレード可:RAMは基板に半田付けされているため、交換は不可。内部ドライブを追加するためのスロット/ポートはありません。しかし、オプションとして外付けフロッピードライブを経由すれば容量を拡大できます。

    • 奥深くに取り付けられたネジと堅く閉じられたパネルにより、ケースは開口するのが困難です。

    • 電源とCRTは高電圧が流れているため、修理は潜在的に危険な行為です。

    A third party offered a hard drive that mounted internally, using a clip atop the CPU.

    Joel Finkle - 返信

    You're thinking of the SCSI interface upgrade. It clipped over the CPU and a ribbon cable was snaked out through the battery door. As far as installing an internal drive, you had to remember that it would be a while before 3.5" HDs would even be available, and that they were initially the same height as 5.25" 1/2-height drives (full height being about 3.25").

    cityzen -

    Ah, the Hyperdrive: http://www.flickr.com/search/?q=hyperdri...

    I was thinking of something like the Dove MacSnap: http://www.vintagemacworld.com/macsnap.h...

    The Hyperdrive was pretty rare & expensive, whereas upgrade kits like the MacSnap eventually became cheap & common.

    cityzen -

    You are thinking of the Hyperdrive. That pre-dated SCSI by quite some time.

    dave - 返信

    There was the Paradise hard drive that tried to match the Design of the mac and was connected to the serial port. Needed a boot disk to activate and was a bit slower than the disk drive, but had 10 MB! (at least mine has - there was a 20MB version too)

    ReiZu - 返信

    The RAM 'could' be replaced. I know, because I can remember upgrading my 128k machine to 512k on my kitchen table. I wouldn't recommend anyone try it because it's a lot of chips to unsolder.

    john - 返信

    Back in those days I made a good bit of money upgrading and repairing these old Macs. The RAM upgrade was unsoldering the old RAM, replacing with 256K x 1 chips, and there was a little circuit board that soldered into the 7 solder flow through holes located at one end of the 68000 CPU (next to the resistor pack).

    I still have a good bit of Mac 128K parts and pieces in storage.

    Raymond Flowers -

    I am looking for advice on a Mac 128k I bought a few months back it turned on then. Now the power is on lights can be seen through the floppy slot but the monitor doesn’t come on not even static. Any ideas anyone work on the units?

    Louis Reed -

    Please please please shine a flashlight in the case. It has the signatures of the team that designed this mac engraved in the plastic.

    pinky - 返信

    Seriously, iFixit? Complaining about the non-user upgradeable RAM? Who would ever need more than 128k of RAM??

    JM Palacios - 返信

    But you could upgrade the memory. I did it on mine!! Going from memory:

    1) order 16 DIP dynamic RAM memory chips (4164, with 64 kilobits each) for a few hundred bucks total.

    2) Carefully bend up the /RAS pin (or maybe it was the /CAS pin) of each DIP

    3) Piggyback the DIPS onto the existing memory chips, and solder the other 15 pins on each one.

    4) Solder a wire daisy-chaining the bent /RAS pins on all 16 of the new 4164s.

    5) I forget whether you had to dead-bug a 74xx TTL onto the board, or if the appropriate chip-select was already in the circuitry, but somehow you got the right signal to go to the daisy-chained RAS line.

    And that's all there is to it.

    David Palmer - 返信

以下の翻訳者の皆さんにお礼を申し上げます:

100%

Midori Doiさんは世界中で修理する私たちを助けてくれています! 貢献してみませんか?
翻訳を始める ›

I can remember upgrading a Mac - kinda scary since new it cost me like $3,000! All went well and I did a couple of more for friends.

The Lisa was much easier to work with - the stuff just slide out like a tray. Had one that had been converted by Sun Computer in UT. I was the envy of all my friends with that machine - 'big' screen!

Richard Stevens - 返信

I didn't see anything about discharging the CRT tube. And important step if you are working on such old technology.

Sam Weiss - 返信

The RAM 'could' be replaced. I know, because I can remember upgrading my 128k machine to 512k on my kitchen table. I wouldn't recommend anyone try it because it's a lot of chips to unsolder.

http://tieudunghay.com/threads/xu-huong-...

http://www.1nhap.vn/threads/9847-Nghe-th...

http://suckhoe123.com/index.php?forums/c...

thuysearching - 返信

a  e  s  t  h  e  t  i  c

camilojcock - 返信

Can iFixit do another Take-Apart that is a little newer?

Alec Mitchell - 返信

I'm opening my mac, same model. Is there any risk of getting electrocuted with the monitor or any other part if the computer has been turned on recently?

Albert Einstein - 返信

possibly. You always want to make sure that you discharge all the caps including the CRT. NOTE: A CRT can carry a charge even when the display or system is turned off and can build up a secondary charge after the power is removed. Because of dangerously high voltages it is important that you do not touch any of the following parts inside the product housing until after the display is disconnected from its power source and properly discharged.

oldturkey03 -

.05 joules is not "dangerously high". Old wives' tale.

ymcaisnopansy - 返信

I had one of these in middle school, bought it from the neighbor for $25 including the original box and Apple printer. Wish I still had it, as I could have bought a new MacBook Pro for what they go for on eBay with the original box and manuals!

Tidbit - Mine had a 1MB RAM expansion board in it, it piggybacked in on top of the existing chips with some funky clip that fit over the top of a couple of the chips. Not sure how it worked but the guy I bought it from said that expansion board cost almost as much as the computer did back in 1985 when he bought it!

Andrew Bowers - 返信

コメントを追加する

統計データを表示:

過去 24時間: 11

過去 7 日: 64

過去 30 日: 402

今までの合計 187,589