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Is this an H9278-A? If so, you have a gap before the RQDX3. The Q Bus is serpentine. It goes in slots 1-3 AB, but then 4AB->4CD->5CD->5AB. You have the RQDX in 5AB and nothing in 5CD. Page 1-12 here for more details...

The top 8KB/4KW of address space is by default memory mapped I/O (notice the CSR address 176500, for example, falls in that space), so it's expected that the RAM there is unusable.

11/53 doesn't have cache, so one less thing to worry about.

One correction - it's H7826-AA, though I suspect the lack of responses is not a result of the typo.

Hi folks, I'm trying to resurrect a DECStation 5000/120 that I got in an unknown state. For starters, it won't turn on. The fuses are good, and the capacitors in the input section of the power supply look good on visual inspection (no signs of smoke/burns, bulging etc). There is one bulged...

May be easier to get a ZuluSCSI RP2040 or a similar device. You can just copy these images over. It's the easiest way to get software on SCSI computers IMHO. Just copy to an SD card.

VMS calls it an interactive boot. Instructions on how to do that on a MicroVAX are here (for example).

Are you thinking of DTR? (datatrieve-11)

I would love to see a Unibone/QBone like device for the OmniBus. That probably covers most of the items on your Omnibus list, as long as someone writes the software (other than the logic analyzer probe).

There are tips on how to do just that here (never tried it myself - I installed my MV2000 from a physical TK50z, so YMMV).

You need to dismount it before trying to mount it /system... With the device unmounted (and online) you want to issue mount/system dka100: user01.

Not exactly what you asked for, but I found these videos to be very informative (and fun to watch) as well.

ZuluSCSI is your friend... Copy the ISO image, hook it up, and it should just work.

If you really want video on a DS10L your best bet is to find a DEPVZ-AA, which is a combo card of video + SCSI + 100 mbps Ethernet in one PCI slot. They're not that rare.

There's some info here, though I never tried to modify one based on these instructions.

I found my records - I last got MMJ cables and adapters from Pacific Custom Cables, but their web site seems to be down, so maybe they went out of business, but if not that could be another option. My last purchase was in Oct 2020 and it was $11 for an H8571-J back then.

They're called DEC MMJ connectors. Here's a page with all the pinouts (haven't checked them for correctness, so no guarantee). The adapters come up for sale ever so often or there are several places that'll make you new ones. I got some over the years, but don't remember where from. By vintage...

Use tu58fs, which takes away the problem of messing with putting the diags on an image. It just reads them out of a directory on your Linux machine.

Looks like you have two DSSI disks there, so the easiest is probably to netboot (as mentioned above), copy the installation media to one of the disks, and then install locally on the other disk. The other option you can look into if you want to use SCSI is to get an HSD05 or HSD10, which are...

I would be potentially interested in a couple of sets of EAE clones as well.