esselfortium
Well-known member
I recently installed a Turbo 040 in my Mac II, and was immediately greeted with an "unimplemented trap" system error when trying to boot from my existing OS (7.5.3 I believe?). I've since tried a number of different images on it, with mixed success. It boots from a small premade 7.1 image via Disk Jockey, and it boots from 7.5 Utils via 68kmla IRC (thank you @zigzagjoe !), but I haven't been able to get it to boot with the originally-working system, a 7.5.3 install CD image, with a clean install of 7.5.3 made on the II using said image (while booted from 7.5 Utils), or from a prebuilt 7.5.5 image downloaded elsewhere. At this point I'm running out of ideas.
At first I thought it could be a MODE32-related issue, but the Turbo 040 manual makes no reference to a 32-bit requirement (and even mentions the ability to swap between 32 and 24-bit addressing modes), and it doesn't seem to want to boot from most systems regardless of what I've done with MODE32 and the 32-bit addressing setting, anyway.
I've also tried removing the NuBus ethernet card that was in there, but that also didn't help anything.
Any clues what this might possibly be? Thanks for reading!
At first I thought it could be a MODE32-related issue, but the Turbo 040 manual makes no reference to a 32-bit requirement (and even mentions the ability to swap between 32 and 24-bit addressing modes), and it doesn't seem to want to boot from most systems regardless of what I've done with MODE32 and the 32-bit addressing setting, anyway.
I've also tried removing the NuBus ethernet card that was in there, but that also didn't help anything.
Any clues what this might possibly be? Thanks for reading!
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