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I'm fixing up an SE/30 and my brightness pot has also been munged. In my case, ~180KΩ is the value needed for adequate brightness. Your 18KΩ seems very low (for a 1MΩ pot) - was this a typo? My SE/30 also had a arcing CRT due to it the nipple breaking at the end of the neck and hence bye-bye...

Github's a fine suggestion. And don't overlook the collected wisdom of the ROM gurus such as Doug Brown, Steve Chamberlin, Rob Braun et al: https://www.downtowndougbrown.com/programmable-mac-rom-simms/ https://www.bigmessowires.com/category/rom-inator/ http://synack.net/~bbraun/...

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.