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Managed to ruin the ends of three traces while removing dead mask ROMs, only on the final chip. Everything was going smoothly until the last possible moment. At least the bodge wires will end up snugly pinned beneath the DIP socket, but it'll be weeks before I forgive myself for blemishing such...

This brings to mind another riser/Twinspark quirk that made me uneasy, the EMI near that top card... Ever put your hand near the anode cap while wearing headphones? BZZZZT.

Seconding most of what's been said, I have a DiiMO 030 and a TwinSpark, but have since removed them. DiiMO's a perfect fit for my recently-revived IIci, but that TwinSpark is just an expensive egg on my face. It was a huge improvement, sure, but without color and 640x480, I eventually regretted...

My "new" IIci's soft power was stuck always signaling on, but I found the three micro-breaks in the relevant traces. Wish I'd spotted them during the board washing, but oh well. Humorously, both could've been fixed by simply bridging pins, but I wanted to make this look as elegant as I could, so...

Do you have a bench power supply of any kind? ATX->10pin adapter? I'd second the PSU suggestion, and test with a known good one, just to quickly confirm whether the PSU has the fault.

Got a hold of a cheap IIci and made the logic board sparkle again. Lifted dull-looking chips, cleaned the legs and pads, drag-soldered back fresh. Nice new caps, no broken traces in the acid zones, power circuit works. However, either the ROMSEL circuit or the ROM chips themselves are again bad...

You are not going to enjoy hearing this, but I found the break in the circuit, at least on mine. It was between R33 and C107+C105 (back side.) I did this IIsi in 2017 or so, before I was anywhere near as good at neutralizing and washing PCBs, and some residual electrolyte was trapped in my...

I have this as well on my good IIsi. I have a broken motherboard where this circuit works as intended, but the test pads near the oscillator and the MCU do not have a pulse on the good board. I've been checking continuity, resistances, hertz, etc for hours and would be curious to know if anyone...

It looks so beautiful that I'm already dying to see someone talented at drag-soldering put one together. These things always make a great visual aid to schematics, and seeing as you've gone back and patched the Bomarc ones, it's a win-win. Whether someone needs bodges and trace repair or a brand...

I'd seen mentions of cursors flickering on some Macs because of time/RTC related problems. After taking a closer look at the RTC circuitry in my cheap Mac IIcx, sure enough, it's not the video card! After scraping, tinning, and meticulous bodging, it's all right.

Invisible to the eye without a big lens, but one of the traces that was hardly rotten looking was bad. The break must've been hidden under an oscillator, which I was afraid to bend too far. It was the exact same fault as what was already found in this thread! Same legs on both Y4 and the RTC...

Sorry for the double posts, I'm still trying to figure out why APD's Logic Board components test is failing. It's not my memory, extensions, or system software, all of which I've ruled out. I've also verified that the IIx family ROM always has the checksum $97221136 so it's not that either. I've...

The video card is working great. Stereo sound and music work, as does networking. I haven't had it crash or behave strangely at all, except when I run Apple Personal Diagnostics. The "logic board components" test fails after a long time for no apparent reason, and gives me no useful details in...

Most of what Godot uses SDL for is just an abstraction layer for input, so they don't need to have tons of platform-specific code for gamepads. Even if you could hypothetically target m68k with it, I wouldn't expect it to fit, because the GDScript interpreter and the matrix...

Thanks, I may stick with using the ROM SIMM slot for the time being, knowing that. After my fight with the axials, I think further through-hole on the IIcx will require some more practice. Even with a desoldering gun, I was pretty much scorching the pads around those holes before their contents...