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Yup. I use a ribbon cable:

I believe blue LEDs post-date vintage benchmarks. They were certainly developed well after the IIcx. So the benchmarks are blind.

An alternative I've used dozens of times is a dental probe. A fine and rigid stainless steel tip chases solder out of through holes easily. Heat should be applied to both hole and probe.

I'd check the power switch contacts and deox if required. And does the cold-start power-on happen with a Mac PSU? It may be a quirk of your ATX PSU plus adapter.

It perhaps goes without saying, but the IIci startup circuit is identical (modulo labeling) .. so you can compare the IIcx with that. And you can of course swap PSUs between them.

I think the issue is that they're not explicitly labeled but they're the reverse of their neighbors that are. So it's confusing. If you're installing tantalums, at least putting these in backwards won't cause fireworks! Unlike the LCIII's infamously mis-labeled C22.

They are unused gates. It's similar for the IIci too. The startup logic was misfiring on one of my IIci's and I considered substituting an unused gate (turned out to be a near short elsewhere). Note the caps in this circuit need to be good for the power-on/-off to work; they're used as RC...

You need termination on both internal and external legs (although you may get away without). But you must have distinct SCSI IDs.

For my adapter, 1459 is multiple scan 21".

For the record, in the DIP switch lotto on my LCIII and Acer LCD, I use 1459 .. giving 640x480x67Hz and 832x624x75Hz.

Looks like you're right. And to confirm, I dug out an old 12GB drive which has an 8GB OSX volume plus a 4GB OS9 (which is above the 8GB limit) and I stuck it in my Beige G3 Tower. It booted the OS9 volume just fine. This was the original drive from a B&W G3. I've always understood the...

I should have said G3 v2 which is OFW 2.4. I can't say I've ever tried without an IDE drive present. These machines are notoriously cranky and a time or two I've had to resort to an OFW init-nvram to straighten things out. [But I do multiboot several other OSes.]

Hhmm .. I have two machines with v3 ROMs that I can vouch for.

Firstly, the 8GB IDE/ATA restriction is imposed by the firmware and it applies to booting any OS. Once an OS is running, it's subject to the ATA limitation of 128GB (28-bit addressing of 512byte sectors) so partitions beyond 8GB are accessible. For Beige G3s (desktop and tower), I've tried...

There's no SMP support in the m68k v2.2 kernel of Debian 3.0 and I'm pretty sure it hasn't changed subsequently. FPU is required for userspace (something I discovered before I added an FPU to my LC III). NetBSD indeed has FPU emulation but no multiprocessor support.

Very impressive but pretty silly :cool: I too have a Q650 (@33MHz) and I run Debian 3.0 (Woody). That's much more retro and snappy: from a SCSI2SD it boots to console login in just under 2 mins. And it'll rebuild its kernel in about 150 mins. I also run NetSBD 3 and that's even snappier.

So .. here's an image of my original install floppy .. perhaps that'll work for you:

There's already a copy on the Garden. Does it not work?

Yeah - the originals were higher res and they got mashed. Re-uploading. Attaching a .hqx. Nope. I believe it's FPU related as others have suggested.

For reference, here’s most of the original manual including scrawled notes about jumpers from a tech support call I made back in the day.