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You can use an embedded SCSI device with the Sun multibus SCSI host adapter and SunOS 2. It takes some work, but is not impossible. I don't know about ZuluSCSI specifically, but I did some (ultimately successful) testing with a 2 GB IBM DFHS-S2F...

Just the Archive Sidewinder, AFAIK. There are two Molex connectors with +5/+24 (IIRC? Maybe that was just in the Sun-2 SCSI shoebox. It's been a while since I've been inside the 2/120). The second is meant to power the Sysgen SC4000 tape controller (the SC4000 only connects to the +5 supply)...

Same size, apart from the slightly over-tall terminals. The 2x 26000uF are wired in parallel, which makes them equivalent to 1x 52000uF, with a pretty sloppy tolerance (-10% +75%). 49000uF is (just) within that tolerance, but to be "safe" I augmented it with a 4700uF part, effectively giving...

A bodge. I couldn't find suitable direct replacements. If I could have found correctly-sized 27000uF units as an option, that's probably what I would have bought. As it was I still had to use a file to shave about 1-2mm off the screw terminals of the replacement part I used, to get it to fit...

If someone _does_ do this upgrade, I have a IIe board with a faulty IWM and I could use the old chip for that repair. Drop me a line in such an event, even if it's years down the road.

Is this what you're looking for?

I'm a bit baffled how it happens that such a piece of hardware can "wear out".

5378 PC AT/GX attachment adapter. The graphics adapter itself is in an external box.

I have a copy of the 9402 Problem Analysis Guide I didn't remember owning that's got some MAPs and stuff that you'll probably find useful. I will scan some of the relevant parts for you, but I may not be able to get to that until the weekend. FTR there are some other non-EPO, non-PSU related...

I had trouble on my 9402-F02 with the on-side of the EPO switch being faulty. Test it with a multimeter. Mine was dual-throw so it was possible to switch the wires to the other side of the switch and re-mount it upside down. Good as new.

Re-exporting an NFS mount via NFS is forbidden (or at least it was), though I couldn't tell you if the BSD guys were exercised about following that part of the specification. The Linux guys clearly weren't.

They also ship notoriously poorly, so a number of ones that did survive have been smashed to bits while in transit from one owner to the next.

I'm not an expert at this but my guess is that 4 is an hsync signal, and 5 is monochrome video. Unsure of 7. Maybe 7 is video and 5 is intensity. Maybe 5 is video and 7 is vsync. But the levels/frequencies are not entirely as I would expect to see. Looks like at minimum you'll need an older...

That's an internal clock doubled frequency. You're actually trying to run it at 50 MHz by installing it in a 25 MHz board. So that's potential problem one. Even in PCs these chips caused loads of problems for (especially non-DOS) software, because of internal cache discipline and other...

the diagnostic disks are standard pc style format. double sided, 18x 512b, 500k data rate (1440kb). if you ran out of space you were not writing them correctly. you don't need a flux imager for this project.

The RAMDAC on the video board is possibly faulty. Certainly, if it's not the monitor, it's going to be in the analog part of the card.

The PLD is a Mac thing for decoding what amounts to a "double" SIMM.

KM41C400 is 4 megabit (each chip gives 4 M x 1 bit). 8 chips gives you 4 MB. 4 SIMMs each with 8 chips gives you 16 MB. HY514400 is also 4 megabit (arranged differently, each chip gives 1 M x 4 bits). 2 chips gives you 1 MB. 4 SIMMs each with 4 chips gives you 8 MB.

Regardless of console, there is no output during self-test. Only the front panel LED codes. All of (more or less) the chips on the CPU board together are "the CPU". Neither an XGA nor XGA-2 will be of any use with the RS/6000. If you intend to get unprotected access to the filesystem to...

hmm, that's not very good. but I think there's not much you can actually have killed besides the RTC, with it in backward. You end up with power and ground swapped on the RTC, which is what would kill that. but you can't put battery voltage out into the motherboard. and if you could it's only...