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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...

That's an encouraging find with the ROM itself actually being dodgy, well done! Did you need any special tools such as a hot air preheater, to coax the DIP out of the board? I'm interested in getting the same socket and a ROM/programmer from a supplier in the future, for a IIcx whose onboard...

Check out that ortholinear keyboard! The industrial design group were way ahead of the curve.

You're right! I just plugged my NuBus Asante Ethernet card again, but this time I actually got the TX/RX LED and the auto-sense/media one that turns on when anything is connected. I must've been overthinking about accidentally breaking something last night, and not plugged the card or the RJ45...

Great idea, I'd completely forgotten about that dialog! (I didn't even own a Mac with working soft power until a week ago.) The lock lights work as expected, the beeps and pressing return to use the default/selected dialog option work as expected. Both ADB ports, though the metal shields on them...

I moved the RAM from bank B to A before getting it to work for the first time, so actually, you're probably right! I'd seen people seemingly boot IIci's with only B filled so I was confused. Furthermore, 24-bit ROMs do slow chimes for a RAM failure, where later 32-bit clean ROMs seem to play it...

This is kind of an odd question, but is NuChip support dependent on special code that's absent from the stock SE/30 ROM? If so, then I imagine I'll need to order a ROMinator or similar, before trying any NuBus cards. For that matter, I wonder how much of the IIsi's NuBus awareness is in the ROM...

I looked at the traces a bit more, comparing them to hi-res scans and the PCB layout for the reloaded PCB on github, and didn't see anything. I think regarding which ROM/address is bad, you're probably right, assuming the return value itself is correct. I put the SE/30 ROM in again, took off the...

Thanks for the working example, it looks like it may have produced useful output. From picocom's output on my PC (top line's obviously from the terminal itself and not the IIcx): *** local echo: yes *** *A*A *4*4 *T000400010000*T *R000000020000*R I've never gone beyond checking for signs of...

I recently got a scrap Mac IIcx, mostly to get its case for a different project, but still tried to clean and recap the board to see if it could boot. I did not attempt to power this logic board at all until the recap and washing/drying were all done, in case stray goo fried anything. The...

Hello. Are there any modern PDS 030->IIci Cache adapters out there for the Macintosh IIsi? Commercial or DIY, I'm not picky and only really care about availability, as I've been searching Ebay for quite a while with no luck yet. I'm aware the DiiMO 030 has been comprehensively...

A backup from the old Apple site seems to confirm. I'm likely getting a IIcx chassis for a project, soon, and can check if the screw is present in there.