Crutch

EDIT: I meant “Pina”!

Did you try a little WD40 into the troublesome switches? Pena recommends that as I recall, anyway it’s worked for me.

It is a multi-layer board. @LaPorta if you reference the schematics that Bolle linked to, print pages 6 and 6a and lay them next to each other. You should then be able to follow all the traces on the diagram and check for continuity. @upusen for any bad traces you’ll need to solder a jumper. I would check for YouTube videos on “how to solder a wire to an IC pin” or similar, but one way to do it is to strip then tin the wire, then hold it steadily onto the correct pin (perhaps with a Helping Hands) and touch your hot iron to the tinned wire, holding it there until the solder melts. This should solder the wire nicely to the pin without creating a solder bridge to the other pins. Once you’re done, check that there is NO continuity between adjacent pins, indicating a short.

The closeups of my Seasonic PSU ATX connector in my earlier post on this topic (Nov 25 2018) may give you what you want. The colors are ATX standard: yellow = +12v, red = +5v, black = common, green = PS/ON, blue = -12v. Of course it’s also very easy to just power the thing up and test each pin with a meter to make absolutely certain (this is what I did...). Also see this helpful link from Von: http://bylenga.ddns.net/index.php?page=SE_ATX.php

That’s cool. I was pretty excited for a minute you were going to get that 400k external drive to work!

@ants remind me what compiler you used to build it? Is it possible the linker is including the whole C++ library even though you are presumably even using a tiny slice of it? I am certain you could built it in C++ using CodeWarrior and it would be a fraction of that size. (The FirePower screensaver I recently uploaded the Garden - link in the Software forums - is written in C++, fat binary and under 200k as I recall, compiled with CodeWarrior.). I’m not sure what external libraries you’re using than iconv, but would a CW recompilation be possible?

Well done @ThisDoesNotCompute! Interesting resolution.

Well I'm no expert whatsoever and hopefully someone smarter will respond, but I can tell you what I have ... I got this X-Tronic XTR-4040-XTS bundle for about $150 a while back. I have limited space so wanted a single compact unit that did everything I needed. It includes various size nozzles and I was able to use it to easily remove & replace a couple surface mount ICs in the past by quickly moving the nozzle back and forth around all the pins. https://smile.amazon.com/gp/product/B003TC8EQS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 You could spend way more for a Hakko unit that's probably far superior in every way, but this worked fine for me.

Having just read probably the same page in Pina you did, I think replacing the SCSI chip is the thing to try! (My first thought was, just run an early version of the System Software that doesn’t know about SCSI ... but of course I immediately realized that’s not possible on an SE/30.) I think it should be quite easy with a hot air station (though I have never had to do this myself). Do check all the traces around the SCSI chip first though. I had a problem with my SCSI chip due to cap goo leakage that was fixable by adding a jumper after verifying one of the traces was bad. (Unlike you though, I did see a blinking ‘?’ before the fix.)

There is something very satisfying about seeing a really nice restoration before-and-after. Looks great, thanks for sharing!

INITs are described in the Start Manager chapter of Inside Macintosh: Volume V. (And previously, in legacy Technical Note #14.) Or here: http://dec8.info/Apple/macos8pdfs/InsideMacintosh_PDF/OperatingSystemUtilities/Start_Mgr.pdf

@JT737 I am really excited with the number of people lately looking to learn 68k programming. That’s awesome! Multiple people around here who can help with that if you get stuck with anything. CodeWarrior is a very nice platform, congrats. (I admit I still have a certain fondness for the brilliant THINK Pascal IDE though... I just bought a complete Mac Pascal box set on eBay for $20 and it’s amazing what THINK Technologies could do in 1983.)

This is awesome. Thanks for sharing!

Oh, you can do that with “Set Startup...” in the Special menu or just by naming your app “Finder”... Airborne! did that as I recall. The application file was called “Finder” and they included the text “Airborne!” in its icon.

I think that’s a good approach (start by writing an app for Sys 7), most of what you need in terms of how to drop an app into the background will be in Inside Mac Volume VI. The basics in terms of event handling will be in Volume I, and the File Manager stuff to look for “Autorun” on an inserted disk will be in Volume II. One thing to be aware of is that writing Extension (INIT) is very different from running an app ... INITs can’t have a UI (you need a CDEV/control panel for that) and don’t get to run an event loop (you need a DRVR for that) so turning any Sys 7 app into INIT/CDEV/DRVR for System 6 will be a major project in itself.