{"id":25166,"date":"2020-07-10T23:14:45","date_gmt":"2020-07-11T03:14:45","guid":{"rendered":"https:\/\/pappp.net\/?p=25166"},"modified":"2020-07-10T23:14:45","modified_gmt":"2020-07-11T03:14:45","slug":"macintosh-se-health-check","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=25166","title":{"rendered":"Macintosh SE Health Check"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"819\" height=\"1024\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-819x1024.jpg\" alt=\"\" class=\"wp-image-25220\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-819x1024.jpg 819w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-240x300.jpg 240w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-768x960.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-1229x1536.jpg 1229w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-1638x2048.jpg 1638w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HelloMacMinix-scaled.jpg 2048w\" sizes=\"auto, (max-width: 819px) 100vw, 819px\" \/><\/figure>\n\n\n\n<p>I had my dear old Macintosh SE out for a health check as I slowly extract my vintage computer collection from the (unconditioned) place I&#8217;ve been keeping it at my parents house to the basement of the place I&#8217;m renting.  It had a couple interesting findings that seem worth putting online, including another floppy drive rebuild and a slightly elaborate fan replacement. <\/p>\n\n\n\n<!--more-->\n\n\n\n<p>This particular machine is an early M5010 (Shipped with dual 800k floppy drive, 1MB of ram, squirrel cage fan; If I&#8217;m interpreting right the S\/N indicates 9th week 1987) SE.  I&#8217;m rather attached to it, but not because it&#8217;s particularly pristine (it&#8217;s not), because it&#8217;s convenient (800k floppy controller is a significant liability vs. 1.44), or for any long history.  It was a yardsale find in the early 2000s rather than a machine I owned when it was relevant; I think I like it so much because it&#8217;s very close to my own age.   <\/p>\n\n\n\n<p>It has, over the years, been maxed out without doing anything grossly period-incorrect; 4 whole MB of RAM, an 80MB SCSI hard drive <sup><a href=\"#fn1\" id=\"ref1\">1<\/a><\/sup> installed on its side wrapped in a piece of insulating paper in the spot beside the drive cage and below the CRT where many SEs had a HDD wedged, and the soldered-in PRAM battery has been clipped out to prevent the typical murder\/suicide situations.  One of these days I&#8217;ll get around to installing a holder, but I don&#8217;t really care that it doesn&#8217;t save settings.  Sadly, it also had some broken fan blades in the squirrel-cage that made it rattle horribly, so it had been disabled and ran fanless for a few &#8230; decades&#8230; until I got around to grafting a 65mm in there (see below).<\/p>\n\n\n\n<p>I think the primary thing I&#8217;ve done with the SE is play with MacMinix, which I installed sometime in the early 2000s from the 1.5.10.7 image for HDD based installs that appears to be the only version on the modern net. I have never seen or heard of extant copies of the 8x800K floppy distribution with manual ( 0-13-585050-9, $169 at the time) the documentation and period sources talk about, but would really like to. <\/p>\n\n\n\n<p>I&#8217;ve actually learned useful things about how UNIXes are put together from looking at Macminx 1.5; it&#8217;s a slightly feeble V7-like with almost full source, and was designed as an educational tool (MINIX 1\/2 exists as a companion to Andrew S. Tanenbaum&#8217;s  &#8220;Operating Systems: Design and Implementation&#8221; textbook), so it looks more or less like a &#8220;normal&#8221; UNIX, but is incredibly simple and easy to poke through if you want to figure out how something is fundamentally done.  One of these days I&#8217;ll get around to wrestling the online man pages <sup><a href=\"#fn2\" id=\"ref2\">2<\/a><\/sup>  and a few other well-known aftermarket improvements into the MacMinix image(s).  <br \/><\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25221\"><img loading=\"lazy\" decoding=\"async\" width=\"188\" height=\"300\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-188x300.jpg\" alt=\"\" data-id=\"25221\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25221\" class=\"wp-image-25221\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-188x300.jpg 188w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-643x1024.jpg 643w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-768x1223.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-964x1536.jpg 964w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-1286x2048.jpg 1286w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FloppyTheresYourProblem-scaled.jpg 1607w\" sizes=\"auto, (max-width: 188px) 100vw, 188px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">The gear that always breaks (top + pieces on removed gear) has broken<\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25222\"><img loading=\"lazy\" decoding=\"async\" width=\"154\" height=\"300\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-154x300.jpg\" alt=\"\" data-id=\"25222\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25222\" class=\"wp-image-25222\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-154x300.jpg 154w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-525x1024.jpg 525w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-768x1499.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-787x1536.jpg 787w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-1049x2048.jpg 1049w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/OmronEjectTest-scaled.jpg 1312w\" sizes=\"auto, (max-width: 154px) 100vw, 154px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Motor pads to test without reassembly\/computer.<\/figcaption><\/figure><\/li><\/ul><figcaption class=\"blocks-gallery-caption\">Apple\/Sony 800k Floppy Eject Mechanism Gearing<\/figcaption><\/figure>\n\n\n\n<p>During its 2017 health check I discovered the floppy drives had gone out, and fixed them by diassasembling, cleaning, re-lubing, and installing one of the <a href=\"https:\/\/www.shapeways.com\/product\/M84R343FR\/4-x-gears-for-macintosh-512k-vintage-floppy-drive?etId=164574959&amp;option=42282434\">3D printed replacement gears from Vesperworks via Shapeways<\/a> in one.  That exact design is apparently no longer available, but I see them from other vendors.  Those gears a golden age of retrocomputing piece of space magic &#8211; every Sony\/Apple 3.5&#8243; floppy drive has one failure-prone gear in the disc handling mechanism, and until affordable 3D printing they were irreplaceable.  You can&#8217;t reliably do that kind of fine-pitch gear on an FDM printer, but it&#8217;s easily in the reach of SLA machines, so all the time bombs are defused. <\/p>\n\n\n\n<p>This time the second 800k floppy drive required gear replacement.  A noteworthy thing I&#8217;ve never seen mentioned elsewhere is that there are two large easy-to-reach pads for the motor leads that you can apply 5V to (ideally +5 on the top\/red wire pad and Gnd on the bottom\/black wire pad, but it doesn&#8217;t seem to hurt it to reverse) to test the mechanism without fully reassembling the drive and connecting it to a host. <\/p>\n\n\n\n<p>I also had a scare with the SCSI bus (turned out to be a loose cable, all is well) and pulled the analog board to check for a bad output cap on the +12VD line while I was diagnosing it.  Since I had the board out, it seemed like high time to install the replacement fan I bought for it in ..2017.  I&#8217;m using one of the <a href=\"https:\/\/www.amazon.com\/gp\/product\/B009NQMESS\">Noctua NF-A6x25<\/a> 65mm fans that are recommended various places for SE and similar compact Macs, and I fully concur with the suggestion, it fits perfectly, gives excellent airflow, is essentially silent, and even visually fits in.  <\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25545\"><img loading=\"lazy\" decoding=\"async\" width=\"614\" height=\"1024\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-614x1024.jpg\" alt=\"\" data-id=\"25545\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25545\" class=\"wp-image-25545\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-614x1024.jpg 614w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-180x300.jpg 180w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-768x1280.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-921x1536.jpg 921w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-1228x2048.jpg 1228w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FansOldAndNew-scaled.jpg 1536w\" sizes=\"auto, (max-width: 614px) 100vw, 614px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Old broken blower, new Noctua NF-A65x25.  Obviously not quite drop-in. <\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25541\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"982\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-1024x982.jpg\" alt=\"\" data-id=\"25541\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-rotated.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25541\" class=\"wp-image-25541\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-1024x982.jpg 1024w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-300x288.jpg 300w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-768x737.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-1536x1473.jpg 1536w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/BracketSupplies-rotated.jpg 1960w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Transfer punches, Plastic knife, Carbide scribe, plastic stock, and blower lined up. <\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25544\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-1024x576.jpg\" alt=\"\" data-id=\"25544\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25544\" class=\"wp-image-25544\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-1024x576.jpg 1024w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-300x169.jpg 300w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-768x432.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-1536x864.jpg 1536w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanFootprint-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Footprint for SE analog board fan assembly, with polarity marked.  <\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25546\"><img loading=\"lazy\" decoding=\"async\" width=\"665\" height=\"1024\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-665x1024.jpg\" alt=\"\" data-id=\"25546\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25546\" class=\"wp-image-25546\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-665x1024.jpg 665w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-195x300.jpg 195w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-768x1183.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-997x1536.jpg 997w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-1330x2048.jpg 1330w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/HandDrill-scaled.jpg 1662w\" sizes=\"auto, (max-width: 665px) 100vw, 665px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">New fan mounting base plate, with holes and and drill.  This is the critical part.<\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25542\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-1024x576.jpg\" alt=\"\" data-id=\"25542\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25542\" class=\"wp-image-25542\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-1024x576.jpg 1024w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-300x169.jpg 300w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-768x432.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-1536x864.jpg 1536w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanAssemblies-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Old squirrel cage blower, completed replacement fan assembly.<\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25543\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"678\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-1024x678.jpg\" alt=\"\" data-id=\"25543\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25543\" class=\"wp-image-25543\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-1024x678.jpg 1024w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-300x199.jpg 300w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-768x508.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-1536x1017.jpg 1536w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/FanBracketInstalledRear-2048x1356.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">New fan installed on analog board.  <\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25547\"><img loading=\"lazy\" decoding=\"async\" width=\"788\" height=\"1024\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-788x1024.jpg\" alt=\"\" data-id=\"25547\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25547\" class=\"wp-image-25547\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-788x1024.jpg 788w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-231x300.jpg 231w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-768x998.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-1182x1536.jpg 1182w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-1576x2048.jpg 1576w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEAnalogBoard-scaled.jpg 1969w\" sizes=\"auto, (max-width: 788px) 100vw, 788px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Completed SE analog board with modern fan.  Don&#8217;t power this thing without a motherboard, it won&#8217;t work right and you&#8217;ll possibly have 10kV on the anode cap. <\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/pappp.net\/?attachment_id=25551\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"794\" src=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-1024x794.jpg\" alt=\"\" data-id=\"25551\" data-full-url=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-scaled.jpg\" data-link=\"https:\/\/pappp.net\/?attachment_id=25551\" class=\"wp-image-25551\" srcset=\"https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-1024x794.jpg 1024w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-300x233.jpg 300w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-768x596.jpg 768w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-1536x1191.jpg 1536w, https:\/\/pappp.net\/wp-content\/uploads\/2020\/07\/SEComplete-2048x1588.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Top view of my open but fully assembled SE in current condition.  Replacement fan, SCSI HDD tucked next to drive cage in insulating wrap<\/figcaption><\/figure><\/li><\/ul><figcaption class=\"blocks-gallery-caption\">Macintosh SE refit for modern fan<\/figcaption><\/figure>\n\n\n\n<p>I did have the problem that because my SE is an early model with an awful squirrel-cage blower, I don&#8217;t have a bracket for a normal fan.  Getting said brackets on the Internet tends to be expensive.  So, as the owner of a 3D printer and CNC router I naturally&#8230; built the adapter entirely with hand tools.   After I pulled the blower I realized I could just transfer its base plate dimensions and hole pattern onto a sheet of plastic (I used 1\/8&#8243; Acetal, HDPE would also be fine, I found my Acetal first), cut and drill it from the marks, and be done without a bunch of modelling and set-up.  <\/p>\n\n\n\n<p>I built my bracket with a second vertical plate to screw the fan into, but it felt a little less solid than I hoped, so I went ahead and epoxied the fan to the base plate as well.  In retrospect, I should have just skipped the upright and gone directly to epoxying the fan to the plate. Some notes on building the adapter:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>If you work with plastic sheet goods, you owe it to yourself to get a proper plastic scoring drag knife, I&#8217;ve had one of these <a href=\"https:\/\/www.amazon.com\/gp\/product\/B003UHUZ5U\">OLFA PB-800 holders<\/a> for a couple years and it is absurdly better than a box cutter.  Start it along a straight edge, a few passes for score-and-snap, or with a little patience you can cut with it by making more passes. <\/li><li>Manual hand drills are cheap and enormously more tactile than power drills, the extra control makes not melting or cracking plastics way easier.  <\/li><li>Even for hand drilling, if you&#8217;re transferring with punches, spot drill before you drill. I missed one and tried to drill without and it was much uglier <\/li><li>Just as many people suggest a sheet of insulation foam for putting under things you circular saw, foam makes a great backing for all kinds of cutting and drilling, especially in softer materials. <\/li><\/ul>\n\n\n\n<p>And with that, my SE is back to full function.  Yes, there is a mile of unnecessary extra SCSI cable coiled up behind the hard disc, it&#8217;s been that way for ages, I&#8217;ll fix it if I ever want to put a PDS card in.  Yes, the case has some increasingly-evident yellowing that I could peroxide bleach out, but it&#8217;s only cosmetic, compact Macs require somewhat invasive disassembly to bleach, and the machine spends most of its time under a cover anyway.  But it&#8217;s entirely functional for a period-correct machine, and not experiencing any unnecessary degradation. <\/p>\n\n\n\n<p>I&#8217;ve been having some fun talking to newer machines via a Mini-DIN-8 to DE-9 cable and various serial adapters, and a <a href=\"https:\/\/github.com\/bozimmerman\/Zimodem\">ZiModem<\/a> I knocked together to try, but that is a separate post.   <\/p>\n\n\n\n<p>Notes:<br \/> <sup id=\"fn1\">1. You could <a href=\"https:\/\/everymac.com\/systems\/apple\/mac_classic\/specs\/mac_se.html\">buy the SE with 20MB or 40MB HDD<\/a> and one floppy from the factory; Apple was selling <a href=\"https:\/\/everymac.com\/systems\/apple\/mac_ii\/specs\/mac_ii.html\">80MBs in the Mac II<\/a> at the time, so close enough to period.<a href=\"#ref1\" title=\"Jump back to footnote 1 in the text.\"><\/a><\/sup>\n<br \/>\n<sup id=\"fn2\">2. The real, commercial Prentice Hall MacMinix distribution didn&#8217;t include online man pages, you got dead trees.  The dominant man system used on it was <a href=\"https:\/\/groups.google.com\/forum\/#!searchin\/comp.os.minix\/Toomey%7Csort:date\/comp.os.minix\/iAcnIZkaI2c\/ittQe1fH_JMJ\">apparently<\/a> set up by Warren Toomey of TUHS fame in the early 90s, when it wasn&#8217;t historical.  He was quite active on comp.os.minix and maintained a FTP server for Minix stuff out of the Australian Defense Force Academy in the early 90s.<a href=\"#ref2\" title=\"Jump back to footnote 2 in the text.\"><\/a><\/sup><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I had my dear old Macintosh SE out for a health check as I slowly extract my vintage computer collection from the (unconditioned) place I&#8217;ve been keeping it at my parents house to the basement of the place I&#8217;m renting. &hellip; <a href=\"https:\/\/pappp.net\/?p=25166\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,8,37,1,10],"tags":[],"class_list":["post-25166","post","type-post","status-publish","format-standard","hentry","category-computers","category-diy","category-electronics","category-general","category-objects"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/25166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=25166"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/25166\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}