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Sadly, I don't have a Pi and should .. because this is yet another case where a Pi's handy :). I also came across https://trmm.net/Mac-SE_video/ using the same technique.

I'm restoring an SE/30. The logic board needs recapping but the analog board and PSU are in pristine condition. So while I'm working on the logic board, is there a way of testing the video generation without the logic board being connected? Can the video signals be fudged to display a blank...

You'll need something on the other end of the line to return characters. Connect your machine to another through a null modem cable. Make sure the speed and encodings match. I occasionally use Zterm on my SE to connect to a serial line (e.g. serial console) of another machine to log-in or get...

Yes - burn a CD-R from the ISO. But be aware that it may be picky about what CD media it will read. My B&W G3 has a DVD drive that doesn't like CD-Rs and I need to burn CD ISO images onto DVD-R media. Your machine, a PowerMac1,1, can't boot from USB but will be happy with a CD/DVD. Later...

10.4 Tiger is what you want. Earlier versions will work but aren't as good; later versions require at least a G4. I run Tiger on my PowerMac1,1 (along with MacOS9.2 and Debian8 and OpenBSD7).

Reboot with the command-V combo held (for verbose boot) and post a video. And/or reboot with the Shift key held forcing a safe-boot to rebuild the kernel extension cache.

So I got another 3112 card - this time for my B&W G3. Yes, it's not an Old World machine but I wanted to see the performance on a 100MHz PCI bus. And also for giggles, I tried a spare SATA 2TB drive (WD Blue) I had sitting around. I got 60-plus MB/s read performance and about half that for...

You can install to this image from the "UTM Gallery" within UTM. Or go to https://mac.getutm.app/gallery/

Yep .. I've used minivmac on Intel machines for while and it runs like a charm under Rosetta2 on arm64. And I just rebuilt it from source for arm64 and that's good too.

I've recently upgraded from M1 Air to M2 Air, and I fancied trying out the Ventura beta in a VM. UTM is a convenient frontend to qemu and the Apple virtualization framework. It's easy enough to set-up a Monterey VM and then upgrade to Ventura. Sadly, a limitation prevents the VM logging into...

All good .. here's 1000 & 3000 screenshot set for my machines:

Unfortunately, your code doesn't allow the system to get a (Shift+Cmd+3) screenshot at completion. I'll have to find another way.

There's no way to software-disable the accelerator so I'd need to pull the board .. which I don't want to do right now. Sorry. What screenshot exactly: Q650? 3000?

A few things: Here's a link to firmware for 3114 cards for OSX only: https://www.siig.com/download/search?keyword=SC-SA4M12&f=true .. the flasher works for 10.1 only, I think, but the firmware can be extracted for other flashing methods. The FirmTek 4-port firmware (ROMFILE.7174) doesn't work...

Macintosh Garden is always the first place to go: https://macintoshgarden.org/apps/mac-os-71

The accelerator is a General Computer HyperCharger 020. For the ci and Quadra, I see as much variability in timings between individual runs than between Pi and Pi20. Also, runtimes vary with different OS versions. For the SE, 7.1 020 accelerator @16MHz: Pi Pi20 100 0.12 0.12 1000 4.00...

These times for Pi. Pi20 is only very slightly faster. SE, 7.1 020 accelerator @16MHz: 100 0.12 1000 4.05 3000 30.57 IIci, 7.1, 030 + cache @25Mhz: 100 0.08 1000 2.53 3000 19.5 Q650, 7.6, 040 @33MHz: 100 0.03 1000 0.93 3000 7.33

Yup, the G3 is a temperamental beast .. part of its endearment. You do need to run Tiger. it installs easily with the XPostFacto dance, and I've found 10.4.11 is nicely stable.

Here's the FWB test result on my Beige G3 DT. The drive is an OWC 3D SSD: In comparison, an HYPERDISK SSD on the IDE bus gives:

If you're not bothered about parity, I've used OWC a number of times: https://eshop.macsales.com/item/OWC/30PS16MB/