The Plexus P/20 is now fully operational!
ฝัง
- เผยแพร่เมื่อ 10 ก.ย. 2024
- It's been quite a journey that I've been on with this Plexus P/20 computer. Is this going to be the video where I can finally say that the machine might actually be fully operational?
Part 1: • What is this rare mult...
Part 2: • First power up of the ...
Part 3: • Booting UNIX on the Pl...
Part 4: • We made some unbelieva...
Part 5: This part
-- Links
Plexus P/20 Discord channel at Usagi Electric:
/ discord (Plexus channel)
General Adrian's Digital Basement channel:
/ discord
My Github Repo (with ROM dumps and images)
github.com/mis...
Plexus P/20 Brochure:
www.bitsavers.o...
Plexus Unix:
www.bitsavers.o...
MFM emulator:
www.pdp8online...
Fujitsu Hard Drive Brochure:
archive.org/de...
Omti 5200 Manual:
oldcomputers.d...
Adrian's Digital Basement Merch store:
my-store-c82bd...
Adrian's Digital Basement ][ (Second Channel)
/ @adriansdigitalbasement2
Support the channel on Patreon:
/ adriansdigitalbasement
My GitHub repository:
github.com/mis...
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/...
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.co...
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress...
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/i...
EEVBlog 121GW Multimeter:
www.eevblog.co...
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/i...
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfrei...
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/i...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/i...
Heat Sinks:
www.aliexpress...
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
Usagi's discord crew are seriously some of the smartest retro-tech people in the world when it comes to these 70s and 80s minis and server machines. Absolute brilliance and it's so good that they are around helping people like you preserve the less well documented aspects of our digital toddlerhood. Great stuff Adrian!
That is why an open source is so important. To have a place to publish when the project is over. But it needs to be in the culture or otherwise all the legal people complications
@@oidpolar6302 You are right. But it is not the terminology or ideology that is important, but the people. I do cracking and piracy since the Commodore PET times (which was of course voluntary work for the kids back in the time, who never could have payed the astronomical price-ideas of the corporations and growing game publishers (they and capitalism spreads like the plague)) and voluntarily work in the open source community since I was a kid. We live in great times now. But my fear is that this will change. After the next mayor privacy scandals the mood may change and also the legislation ... which may make the illegal and unethical handling of data (of strangers!) from big-corp and start-ups very unattractive and threatened with prison. The same inevitably will happen when those embarrassing hypes, like the K.I. nonsense implode or (what already happened) the "crypto-bro's" make new friends and opportunities in prison showers. Then free services like open repositories and free storage, free websites, sponsored projects and the like will have a hard time. Anyways, at any point in the future we have to ask and answer those questions. A free society (including free software or voluntary/free work on software) cannot be based on unethical, immoral concepts.
Those corporations today, who provide this "free" storage will not hesitate to delete the data. Even the recovery of such data will be hard ... BECAUSE MONEY IS INVOLVED! So be aware that if we do not take precautions for the future (which will cost our OWN MONEY!), all that wonderful work, data, acquired and with great effort renewed knowledge ... may be lost! This happened in the past and happens right now to a rate most people do not even wanna know or believe. Not only with printed or (older) historical data, work and art, but right now ... with all kinds of different media. F.E. Good luck with QIC-80 tapes!:)
Take that with a grain of salt and please not as fear-mongering or politics-critique (there is and was nothing better than capitalism and democracy. who says otherwise can p___ off to this wonderful North-Korea:P). Just to be aware that Google, Start-Ups, Tech-Bros and especially Elon Musk are NO ALTRUISTS!
Have a good one, and don't let "them" catch you ... Oidpolar, exidy and community!:)
I used to service Plexus machines in the 80s. I never came across a P/20 though. P/30, P/35, P/55 and P/75, but not a P/20. They were quite good machines. Very reliable.
"Fully operational" reminds me of Emperor Palpatine saying "witness the power of this fully armed and operational battle station."
Therefore, the Plexus is the Death Star. Lol.
I guess it reminds me of At The Drive-In. This station is non operational
If he ran it on sun power it would be a Solar Plexus.
Glad to see it wasn't just me.
Beware the liability of the fan port :)
I'd still really like to see a diagnosis of the power supply reset circuit. One of your other commenters and I on the last video had a debate about whether your fix was potentially bypassing a potentially more serious problem in the power supply That is actively happening, or if it wasn't that big a deal and your reset circuit wasn't an issue. To that end, I'd love to see the power supply revisited and rescoped out both to check the voltages again as the other user suggested should be done, and to see if we can get an understanding of The reset circuit and how it monitors the power. It looked like a complicated circuit and it would be interesting to see what it's responding to or if it's just broken.
Unix System V svr2 commercial source license was for $43,000, with three months of support, and a $16,000 price per additional CPU…. That’s some expensive system you just resurrected !
Considering the small customer base of hardware like this and the level of support required, this machine might have cost several 100.000 USD. All to be thrown into a landfill after a few years of use.
just the operating system ? nice scam they had going back then the hardware i can understand it seems advanced for the time
If it works like the SGI 4D/20 (another SysV based computer), you only needed a source license (which was, indeed, expensive) if you were planning to recompile the operating system itself. If you didn't get the source license but did get a compiler, you still got all the necessary library and header files for compiling other programs, just not the actual kernel code. (I'm pretty sure you got at least some of the libraries even if you DIDN'T get a compiler option, because they were the same DLL files the OS itself needed to run.)
System 5.2 Release 8
@@belstar1128Unix was also really advanced at the time
This is really a fun series. Almost like an archival treasure hunt. Every new episode has surprises.
I think the reason /stand commands didn't run in Unix is that they are not compiled for Unix but compiled directly for the CPU. They probably try to talk directly to the peripherals rather than speaking to the kernel. Sort of like an ATTiny doesn't have an operating system, it just runs the raw code. So even if the program could execute, it might try to access a protected memory space in Unix since it thinks it has full control of the memory map, Unix might intercept that and force the program to dump and exit.
Yep that is almost certainly the case -- luckily there are alternative unix-friendly version on the disk too.
/stand is for munix (mini-unix) and sash (standalone shell).
There is a complete set of man2 files with .2s suffix. Among them, srcheof.2s is most fancy since it's designed just for installer tape head positioning. :-)
@@adriansdigitalbasement Indeed so. Ed 7 Unix had these and others I would think. We were somewhat amused to discover there was a stand alone cat. 🐈
It looks like ccal is available as /etc/ccal, interesting that it doesn't appear under a /bin directory.
I was suprised about how different is from other contemporary Unixes (AIX, SCO, IRIX...). They usually use the "bios" only to setup whatever devices you have and load the kernel from there. After that, they usually had a tape or disk partition for statically linked binaries mounted in memory on /sbin to be used like this /stand.
This is quite cool, but I guess one needs to maintain those tools separatelly for each hardware which is not as practical.
It has been quite the roller-coaster ride of a series for the P/20. So awesome that the community real came through to help out making this such a successful adventure!
I had zero interest in this plexus machine because I thought "what can you possibly do with it with no documentation" until I heard what was on it.
That was a game changer! Well done to you and the discord team. That is a once in a lifetime score.
Would be funny it was done by a disgruntled employee. I'll show them, here are the docs in the wild......
Much like DOS 6 source code.
Such a lovely series, it was very exciting detectives work! Thank you for not giving up and sharing. Also thanks a lot to the community and all the help.
Paused the C compiler test just to verify you had it print Hellorld as expected. Nice work reviving this super interesting machine!
Hellorld on all the things. The entries for TI-83 and TI-86 in the Hellorld wiki are mine. :)
Truly these Plexus videos are some of your best work ever, Adrian! Thank you for making them!
P20 is a handsome machine and just reconfirms my belief that all machines need more blinking lights on them. Love this series.
This has been one of my favourite series on the channel. Congratulations on getting it running! The community really came through with this one. Love it!
You’re the friggn Columbo of old OS’s, “one more thing” 😂
I find it so interesting that these old unix device names still are part of being used today. If you use a LTO tape drive, the drive is like /dev/st0 and the "no rewind" function is /dev/nst0, notice the extra "n". And that is found in the device names here as well, it's simply fascinating :)
I was surprised the cpio format was from that era as well, I didn't think we still used such old formats
@@kernelramdisk3348 Red Hat's rpm package format still uses cpio format! So it is "current" technology, LOL!
The com port loses connection because in balanced power mode unused devices are shut down when the machine goes to sleep mode. You can change individual power saving settings for devices though to stop it from putting it to sleep due to inactivity. Putty also has an option for how often it should send keep alive and on lower baud rates that often needs to be increased so the emu can keep signal sync. I know it's convenient, but sleep mode isn't the greatest option for hardware. Low c states still have current bleed issues even on modern CPUs... yeah be a cold day in hell before that ever gets fixed. Congrats on getting the old girl running :)
This series was awesome. Bringing in other communities and even having NCommander give it a go, really made this feel more like a on going event. Great work all around.
So great to see you digging into something that isn't a mass-produced 80s 8-bit microcomputer.
Every time I heard "BATT Signal", my brain filled in "Na na na na na na na na na na na na na na na na... " 🙂
me too! to the bat cave!
Damn! I miss those good ol' @Barnacles unboxings with the bat-knife(tm)
Holy fan-out, BATTman!
No, to the bat basement!
Same here and couldn't stop laughing.
Your upbeat attitude through this, despite all the setbacks, is inspiring.
Congratulations! Such an epic repair series! Very inspiring.
When I was working at a contractor in 1983 we had a development machine a PDP 11/70 that ran System V UNIX. So System V 5.2 release 8. We had an RL02 drive but the copy of UNIX arrived on tape. Good job everyone!
System V ran on the PDP 11!?
@@roundduckkira The very first release did but I don't think the later releases did. However I am not an expert.
Between the Dallas ship and the multi bus.
I couldn't help but think of Fifth Element and Lilu Dallas Multipass.
I loaded the entire comment thread to find this. Glad I'm not alone to think about 5th Element.
And now we're 3. Everytime I hear multibus my brain autocompletes to multipass.
A triumph! Well done to Adrian and all involved from Discord.
This series has been amazing. Hidden technical specifications on the hard drive for the win!
Adrian you have me riveted from start to finish. Your the Sherlock Holmes of the computer world.😊
Congratulations on getting this beastie working. One thing: you may wish to insulate the inside of the cover with some vinyl tape where the clock module is, because what's facing out is the POSITIVE terminal of the battery. If that goes to ground it could be inconvenient at best, and could cause a problem at worst.
The last time I was that glued to the screen, I was watching The Silence of the Lambs.
The last time I was that glued to the screen, I had just super-glued a damaged chunk of plastic back on and it leaked out under my fingers where I was holding it in place without me realizing it....
@@USFrozen Super-glueing my fingers together. Been there, done that. Been there again. done it again. And again. And again, And...
This is honestly the most compelling project I think I've ever watched you work on. I love it! 😀
I think it's because it started as such an enigma and there was so much to learn.
The big disks are SMD, and could have been attached to a SMD controller on the multibus. Should be easy to just look for mentions of a SMD driver. Edit: ID 3 is missing because on this machine ID 3 is the host. The host does not always take address 7.
I'm pretty sure ID 7 is the standard host port for controllers with 16 (0-15) IDs, while this system only has 8 (0-7) and port 3 is the standard host port.
@@CollinBaillie "Standards are great, everyone should have one". I have seen systems use ID 6 (DEC VAX) and ID 0 (Nortel PBX) too.
Love your content. I understand less than 10%, but your enthusiasm and ability to troubleshoot is mesmerising.
the transistor circuit that un select cal.ce- when in reset / power down is probably against content corruption of the registers; The bus is in a unknown state and stray voltages/signals may be present on the bus that could cause a random write to one of the registers is the chip is selected.
This would be a nice machine to bring to a retro computer party with many terminals connected and then do 80s era chatting for example.
Really enjoyed the series on this beast! Great to know another piece of history has been saved. Thank goodness it landed in the right pair of hands to save it from obscurity and the trash.
uucp dates back to the days when computers would call each other by modem and send a burst of queued files. You can imagine that scheduling calls for late nights and weekends would save money on phone bills.
Yes awesome! I have used a PC version named UUPC and I spent a whole week reading the manuals to understand how to configure it. Awesome sleepless nights!
Usenet was the first 'social networking' protocol originally running over UUCP, and later over TCP/IP. UUCP based mail was the first almost internet mail, and if you connected to a machine that HAD internet access mas a gateway it WAS internet mail.
@@leosmith848 Can you say "bang path"? I knew you could.
Batched many an email over UUCP.
Imagine having a scheduled dial out and some hacker war dialing with ToneLoc just dialed in. What a pain!
Ethernet card would be so cool.
was one ever made?
In 1985 the Ethernet standard wasn't completely developed and approved; it was still in flux. I am not sure an Ethernet card from that era would be able to communicate with a modern Ethernet based network. SLIP was around in 1984, and we know the Plexus has serial ports. I would look into that as an option.
Webserver... Put it on the internet
@@eshwayriExcelan Multibus Ethernet adapter was available for this system... Just because the stupid standard didn't exist doesn't mean ethernet wasn't being utilized by many systems.
Attach a serial to Ethernet adapter and can at least get on the console
Adrian: “Well, that pretty much tells us one thing”
Also Adrian: *immediately lists at least three things*
It was a common convention, at the time of this computer, to have the SCSI controller at ether 3 or 7, and the tape drive at 7.
Also, keep in mind the that SCSI bus is exactly that, a buss that you hang devices off of it, and the controller is just another device like the disk (with termination at both ends).
The community is amazing
It's fun watching you having so much fun with this project.
Freaking fun!
Wow I haven't seen /stand since SCO Unix days :) 1990s!
Looks like quite a pain to use. Every command takes forever to load, and only a handful are available.
By the time I started playing with Linux, standard procedure for rescuing a messed-up system was to boot Linux from a 1.4MB floppy and use regular command-line tools to fix things. It was still pretty minimal, but not _this_ minimal.
The rescue experience got super comfy when CD-RW and USB flash drives became a thing. Those are capacious enough to fit a full-fledged non-minimal OS, including documentation and GUI. Those only became common in the early 2000s, though.
@@argvminusone Linux was a toy when this machine was in real time. The commands are running from ROM and they are surely statically complied, so huge binaries.
NetBSD (probably FreeBSD too) still has /stand - it's where kernel modules live!
Interesting, I had no idea this was (and still is to some extent) not exclusive to this particular system.
@@riz94107FreeBSD's /stand contains statically linked executables. It's actually one big executable, and the kernel must be running.
What a series of videos with an amazing successful outcome. Kudos to all who assisted. Well done, Adrian
Loving all of this. Thanks everyone!
Wow, Adrian that really cheered me up, I've been having a tough time and seeing you (and the team) overcome this incredible technical challenge has really made me feel great. Thanks.
Incredible work from you and the community. What an absolute retro tech treasure trove. Massive props to the original developers of this machine for putting together such a comprehensive and well-engineered debugging and configuration interface as well, way ahead of it's time.
So awesome to see this working again! I couldn’t believe the luck finding all that documentation on the drive. What an interesting series!
Not into retro computing personally, but i just absolutely love seeing the troubleshooting and repair process. Calming and fascinating. Especially in the case of obsecure machines that have been forgotten.
Loved the longer format. Always excited when you do cuts for troubleshooting as i know you are coming back with a discovery.
Been eating your channel up lately.
This P/20 mini series kept me coming back just to see if it could finally run error free. Seeing the troubleshooting process and help from the discord users was pretty awesome.
Your troubleshooting technique is spot on!!…that’s half the battle. You have inspired me to tackle my dead Amiga 4000T…thanks
You are an inspiration. I’ve got a server that randomly reboots and I have been putting it off and putting it off. Pain, pain, PAIN.
As much as I love Commodore machines (big part of my youth), I have thoroughly enjoyed this series, as it has been the perfect balance of the crossover period between minis and micros, and was a nice balance between your normal content, and David's, as it had a mix of both styles. Plus, it is just a damn sexy machine!!!
Am looking forward to seeing this beast actually do something useful, thus fully giving it the final respect & dignity due its station. Much respect for your accomplishment! Kudos!
this series is proper! that handy python script is unbelievably helpful. you've brought a stone cold dead machine to life, on our screens. thank you for sticking with this and documenting the process, watching you work through this stuff is an education in itself. and a great little machine to work on.
I think the video was done just fine Adrian.. no need to apologize to us.. what a great result too, how fun is this?! I can't wait to see what you have planned for this monster.. My mom used to use a Unisys machine that ran a Unix system on it for payroll, she worked for Burlington Coat Factory (the main office in Burlington, NJ) she was the payroll manager I suppose back in the 80s she wasn't really called manager as women in offices, eh, it wasn't like that back then, but anyway.. yeah and then even when she moved to the township job she upgraded to in the late 80s, she was using the SAME machine and same Unisys system.. it was like a strange DOS machine, red monochrome monitor (yes, RED) and well I suppose the software was some type of spreadsheet. I was young back then but was VERY into computers so I got to play with it any time I showed up at her office!! Neat stuff!
Well that was an interesting rabbit hole to go down and explore.. what’s the next exciting expedition going to be .. I guess we’ll have to wait. Cheers mate.
Regarding SCSI ID #3 being the computer's interface, I seem to recall that was also the case on Sun Microsystems computers as well.
Tis has been a really awesome journey with the Plexus, looking forward to you getting the remainder of the hardware functional.
this is quite a journey! can't wait for the next part !
I am loving the journey of this machine. Can't wait to see the next video on it
Such a good series with this Plexus P20. Makes me wish that something like this could have been done with the P20 that we found in the basement of my grandparents house when my granddad died. We ended up filling 2 twenty foot dumpsters emptying out the basement, attic, and the garage. This was back in 2005, and I couldn't get anyone to come look at all of the old electronics, computers, stereos, and other cool stuff he had collected over 40 years of living in that house.
I would be interested in a little review of that Oscilloscope. Great vid as always!
congrads on this one, it was next level difficult. It was also great to see it show up on ncommanders page. I would have loved to see him do a deep software upgrade dive on it. Can't imagine something like a kernel compile on this machine.
Really enjoyed this series - reminded me of my time working as a DEC and Solaris sysadmin in the 90s and early 00s. I've installed and updated unix from various tape formats.. DAT, DLT etc. Installed and configured SCSI cards+devices, added memory... Early on we did all that and only got DEC/Sun support in to fix issues where processor boards needed replacing... Those were heady days indeed!
Wow I was totally riveted to this mini series, what determination and persistence. Well done!
Thanks for this great series about the P20. And also my full respect to the helping discord guys.
Teamwork makes the dream work
What an amazing journey thanks for sharing that with us!
First of all; Adrian, you're a fricking wizard!
I understand that you had a lot of invaluable help along the way, which is not to be diminished in any way, but putting all together combined with your own intuition is no small feat. Crowdsourcing help can bring a lot of invaluable info, but is by its very nature more or less chaotic, and you managed to integrate it and sort out the parts you needed to fix the system. I am truly in awe.
Near the end of the video you quickly asked what "UNIX/1.2 Sys5.2r8" even means. My educated guess is that the first part refers to the Unix kernel version 1.2 (major.minor version), and the other part is System 5, minor version 2, revision 8, referring to the operating system as a whole. If I'm wrong about that, I'm sure some other helpful commenter will explain it. After all, the quickest way to find out that you got something wrong is to state it on the Internet. 🙂
I set up a multi node UUCP network in the early 90's and it can transfer lot's of things. I haven't played with it in a couple of decades but I did link a Linux host to an old sco open server 5 box to do a data recovery. I'll have a play with a modern Linux build and if successful I join your discord and do a cheat sheet on setting it up. Nice to see an old System 5 box up and running. My oldest working Unix box is an SGI Indy.
such a cool looking soulful machine you got there nice nice nice i hope in 5k years it's cherished
My experience with battery damaged chips in arcade machines is that some may be dead already and those that aren't are gonna fail soon. I fixed a Qix (original Taito) and it took several months for the last chips with corrosion to die and on average one per week died. After like three or four months, the machine kept working for much longer intervals between chip failure. It's pretty much working for years now.
By heating up the clock chip the battery liquid that made it into the chip has heated up and probably cracked the die. Same thing would have happened after hours of normal operation.
One more 'Well done' to add to the collection. Your tenacity is impressive.
@32:00 I reviewed the scope meter, it does pretty well, the multimeter is actually very accurate, I tested it on my calibrator and reference standards, like any of these devices the scope is compromised a bit, but is fine for a lot of work.
The combination of luck and technical expertise in this series of videos was just incredible. Well done and thanks!
This was the best since the SWTPC. Games are not my main goal in retro-computing so these systems interest me more. I think that you should do a future video or series where you show us around the software in the system, and demonstrate the multiuser capabilities.
Outstanding result! This has probably been my favorite series ever.
Great series of videos and glad you got this unique machine running... I love old hardware like this - much more interesting than just an old PC.... thanks!
A great series, thank you. I look forward to Plexus updates in the future
Great job! Congrats to you and the Usagi Discord community! So much fun to follow along.
Awesome repair!! Can't wait to see what more you can do with it!!
Love the series. Love that you got it working. Great job! Thanks for sharing.
What a great challenge to follow along, I really enjoyed watching this series Adrian. It would be great to see this machine with an Ethernet interface.
Congratulations to you and the Discord crew!
loving this series Adrian, can't wait for what's next
So glad you made it work! Such a cool machine. Great work and thanks for sharing!
Back in the old days of usenet, we'd use text files that were self extracting sh scripts using uuencode. You can use a command to package a set of source code to Kermit or something like that into this format, and then extract it using bog standard /bin/sh to create a .tar.Z file (assuming uncompress is on the system), then decompress it, untar it, and then compile it. Then you'll be able to use Kermit or whatever to transfer files.
+1 for uuencode/uudecode. You can use it to faithfully transfer binary files over the serial port with nothing at the other end but standard Unix utilities. Good for compressed tar files!
What a ride! Thanks for the journey ^_^
Loved watching this series. The machines I’ve never heard of can be fascinating.
I think you deserve a break, now that you've gotten it working somewhat stably. You've certainly earned it! What a roller coaster of emotions your series on the P/20 has evoked.
This video was totally worth the nearly two hours spent to watch. (Thunderstorms interfering with my WiFi Extender, so I kept losing signal.)
Love this series as both UNIX history and retro hardware general are fascinating to me, very excited to see what you do with the system in the future.
Installing Linux m68k on this dinosaur would be the crowning achievement!👑
Writing a driver for every obsolete undocumented subsystem this uses would be a bit pointless IMO
If you get the blue scsi working with the machine. You can place tar files directly onto the blue scsi at a specific location where ether a blank file is written. (Assuming that file system can only map files linearly.) or you can write to the blue scsi outside of a partition (better idea) with a raw tar file. This of course assumes you can easily access the raw blocks on the disc from plexus unix.
best - from interesting retro devices... good time for it - what it works.
For something so obscure, this had me sitting on the edge of my seat. I hope the next video will explore the software a bit more.
That was incredible! So enjoyed this series! Great job!
Nice! Hats off to all involved
Woohoo! Such an awesome resurrection 🙂
My car broke down. Luckily my car particular had the engineer and mechanic who designed it stored in a secret compartment in the glove box. With both of them free of the carbonite we were able to get it going again.
I remember when I got started as an IT rookie we had what I think was a HP9000 d350 that required a tape to be in place in order to boot. It might have been a slightly older model but it's been 25 years .. I just remember it being a HP9000 and it had to have a special DAT tape in place for it to boot, even though it also had an LTO1 drive.
It was replaced by a hp9000 that did not need a tape to boot so it was a model from the early 90s(90-95) somewhere.
It was already running hp-ux though.