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Seems that way. I found version 1.0.3 of Mac Doom II in an old, old backup I had on here, tried it out, and it runs on 7.1. Getting inexplicable crashes (macsbug telling me "bus error", as seen in the most recent screenshot on the previous page) loading it with certain WAD files that should...

The report says:

Yes. I'll try it, thanks!

Still getting some crashes, so I'm still curious what's going on with it.

Hmm, running Ultimate Doom (or loading Doom II via the Ultimate Doom application) actually works fine, more or less. (Manages to usually get into the game, at least.) No clue why it's not getting along with the version of Doom II that's on Macintosh Garden.

Thanks for the suggestion! (Phone screenshot instead of regular photo from phone because this way manages to do a better job of displaying the CRT, somehow...)

Does the above suggest that something could be wrong with the ROM? I'm not sure how to diagnose this.

Thanks again for all the help! Now, the saga continues. Getting unimplemented trap again when starting a game in Doom 2. Tried again with MacsBug installed and got this output:

Just got this image to boot after zapping the PRAM. I feel extremely silly now for not trying that sooner.

I did a 7.5.3 install on the II a few times yesterday using the full installer, no luck. When I reboot with the new OS it just dies. I can only assume there's something in the System file that it's choking on, that it should not be choking on. I can try this again following your steps, though...

I've had luck with some minimal partitions like that one, just not with any full OS installs, including the exact install from the Mac II this was pulled out of before it was sold to me.

They have a large collection of classic Macs and they do work on them for people, yeah. This might be beyond what they're willing to tackle but we'll see.

I got them both together, yes. I'd take pictures but I've got things put away for now and might be taking it to a local Mac shop tomorrow, if they'll take on the project.

I have both an internal and external scsi2sd, and I'm getting the same results with both, so I don't think it's an issue with the scsi2sd. And super-minimal prebuilt installs of 7.1 and 7.5 do manage to boot successfully from either of them, just nothing else does. There is a rust drive that...

Thank you. Alas, it still errors. I might be out of luck, then.

.hda is perfect, I can use dd to write it directly to the card. Not as convenient as Zulu, but it gets the job done.

Thank you very much! I'm using SCSI2SD, so I can dd an image to it.

Tried putting MacsBug on it, but it seems to not even be getting far enough to initiate the debugger. Fffff.

I've tried it both ways, to no avail. Just did a new 7.5.3 install, making sure to set it to a universal version, and I get the same error.

I have the original II ROM. This is version A of the II, by the way, if that makes any difference.