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.
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.
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...
I think there's a good chance it's not actually destroyed, and is almost certainly not fully a write-off . What happens when you remove the Dallas RTC entirely? Does it turn on? It will probably not POST (and if it does it will definitely have errors) but if the drive spins up you're likely well...
Found these in November. Told the one guy I knew had been looking; didn't realize other people had also been.
http://declegacy.gomtuu.net/legacysupport/digital/ExtIndex4.html
The Appian stuff is among the DECstation 433W files.
I seem to have acquired an X-Ten "X-PORTER/2" 990 coprocessor for running DX10 on a microchannel PS/2.
What are the odds this software still exists somewhere? Is there an active user community somewhere I might pester about it?
The distortion is going to be noise in the analog part of the VGA circuit, the part between the DAC and the monitor, including wherever the sync signals are generated from.
"code runs too fast" is a terrible take, IMO. if it passes memtest86 I think you can reasonably conclude there's no...
Dunno what to say, I use a non-commercial food dehydrator and have baked hundreds of TK50s in it, giving consistent, demonstrable results (completely counter to my experiences with baking QIC) just by propping the flap open. At this point I'd take a project to process a couple hundred TK50s...
My cranky opinion is that it was fintech bozos with monstrously huge monte carlo simulations coded in excel who ended up being the actual primary market for them.
It's at least a little true. My bad attitude makes me jump to the conclusion it's all the way true.
I wouldn't say I collect them, but I have an HP zx2000 "workstation" and the IBM version of the Itanium Development Vehicle ("Intellistation Z Pro"). I don't actually like them much, even after you disregard my feelings about how the aggressive way they were marketed impacted the industry at...