Panasonic Senior Partner

This is my Panasonic Senior Partner a “luggable” portable MS-DOS computer from the mid-1980s.

All buttoned up like this, you might wonder if it’s some sort of old video camera case.

When you open it up and plug in the keyboard, it becomes apparent that this is actually a very old PC…A very old PC that works.

I found this Senior Partner in the Fall of 2011 at Village Thrift and it’s probably one of my proudest thrift store finds of the last 5 or so years.  It’s become an incredibly rare experience to find 1980s PC hardware at thrift stores and it blows my mind that this one is still in working order.

As PC hardware goes, this is almost as basic as it gets.  You have an 8088, a monochrome CRT monitor (with a DB-9 connector for color RGB on the back), a serial port, a parallel and two 5.25″ disk drives.  There’s no hard drive.  There’s no built-in clock.  This machine predates mice on the PC by several years (unless you used a serial mouse).  The only “luxury” is that this machine has is 512K RAM and a built in thermal printer hidden under a flap on the top of the computer.  I suspect the computer’s name derives from the fact that with a built-in printer this machine could be considered a portable office for mid-1980s businesspeople.

But, there’s no battery.  This is not a mobile machine.  It’s a machine you lugged from place to place where you had a place to sit it down and AC power available to plug into.

The keyboard doubles a a cover to enclose the monitor and floppy drives.

When you detach the keyboard you have to pull the retractable keyboard cable out it’s hiding place below the “Panasonic Sr. Partner” label to the left of the CRT and attach it to the connector that hides under a cap on the keyboard.

There are also little lifts you can pull out from the keyboard to place it at a comfortable angle.

As the name entails this was a machine its designers intended for business users.  The monochrome CRT is extremely crisp for word processing and spreadsheets.  When (before the paper ran out) I fired up an old copy of Print Shop the thermal printer gladly printed with no additional setup.

One could imagine some business travelers in a hotel room preparing for a meeting the next day huddled around the tiny green screen furiously printing curled up thermal printed documents…Almost.

Consider the fact that this thing is 35 pounds.  Imagine lugging that around an airport.  There’s a good reason why the luggable form factor that began with the Osbourne and the Kaypro luggables and continued with the famous Compaq Portable was a technological dead end.  The Senior Partner is even larger than the Macintosh despite that machine having a larger screen not actually being intended to be luggable.

The reason for this, as I understand it is that luggables were just normal PC components with all of their heft and hungry power consumption, wedged into an unorthodox case that happened to have a handle.   The engineering advances that needed to happen to make portable computers into “laptops” happened later in the PC realm (though certainly the Grid Compass and a few others were showing the way even when the Senior Partner was on store shelves).

As an antique though, this thing is fantastic.  The Senior Partner is a self-contained retro-computing party.

Easy to setup and quick to put away when you’re done.  When it goes back on the shelf you can easily stack stuff on it’s hard shell.

And simply as an object it looks fantastic.  Sure, it does not look (or act) like the glorious 80s vision of the future embodied in the brilliant Macintosh and Macintosh SE designs.  There’s no Snow White timelessness here.  But, what the Senior Partner does look like is the offspring between a Mission Control command console and an armored personnel carrier.  You have no doubt as to which floppy drive is which because there are huge thick drive letters printed beneath the drives.  The huge embossed “Panasonic” name looks like what you see on the back of a pick up truck.  This machine looks serious in a way that I just adore.

Nothing says retro quite like a brilliant glowing green CRT screen.

When you’re sitting with a machine like this you feel a closeness to technology that is unlike using a computer today.  When you use a modern computer you are swathed in warm colors and pictures designed to make you feel comfortable.  You can quickly switch between multiple programs or browser tabs.  There are a million things saying “use me”.

On a machine like the Senior Partner you basically have one thing in front you.  You have one program with a handful of options so it demands concentration, but the high contrast of the screen makes it easier to concentrate because only the program is glowing and all else is empty darkness.  This is the cyberspace equivalent of a sensory deprivation chamber.

The closest thing I can compare that feeling to is using an e-Ink Kindle.

I suspect that this machine spent a lot of it’s life “buttoned up” and that accounts for what great shape it’s in today.  Despite being almost 30 years old it seems like a missing pad on the “bottom” side that faces downward then the machine is laying handle side up and a few scuffs are the only things wrong with it.  There was little opportunity for dust to get into the keyboard and the disk drives.  I also suspect that this machine may not have gotten that much use in general considering the lack of burn-in on the monitor.

As a retro-computing machine, it is not perfect.  For one thing I have no idea how to get inside of the machine, or if that is even a good idea.  On the one hand, generally if a machine has a CRT I don’t want to get inside of it.  On the other hand, I can’t find an obvious way to replace the printer paper and I wonder if they just intended you to open the case for that.  The back of the machine has what looks to be where an indication of an internal expansion slot, which would be more evidence that you are intended to be able to safely get inside of the machine.

Having only a monochrome screen, no hard drive, only 512K RAM, and no joystick port makes this less than ideal to play many old games or some of the more prominent software I’ve collected.  As you can imagine finding software for a PC with 512K RAM, no hard drive, and only 5.25″ floppies might be an issue.

However, I’ve had some good luck in this area.

When I first bought this machine I remembered that in my parent’s attic I had saved the 5.25″ floppies from an Epson 286 we had gotten as a hand-me-down from my aunt in Cleveland in 1995.  When we had discarded the Epson I had made sure to save the 5.25″ MS-DOS boot and installation disks as well as some educational programs, including the immortal classics The Oregon Trail and Where in the World is Carmen Sandiego?.

This meant that when we brought the Senior Partner home from Village Thrift I had a working DOS startup disk and a few programs so I had the bare minimum needed to see the machine working.

Several months later I found this insane lot of 5.25″ PC games on ShopGoodwill.  I think I paid $16.25 for this lot including ShopGoodwill’s usually exorbitant shipping cost.  What I received is a treasury of late 80s/early 90s PC games.

Here are just a few of the games in that box.

Many of these games require hard disk installation but several, like Ultima I (which we saw running on the Senior Partner in the Commodore 1084 post) and Hitchhiker’s Guide to the Galaxy are perfectly at home running on an early floppy-only PC.  It turns out that many games from the late 1980s basically assumed a PC with 384K-512K RAM so they run just fine on the Senior Partner.

Finally, last year my uncle gave me his old PC and the Commodore monitor I mentioned previously.  Along with that was his box of 5.25″ disks that went with the PC.

The best thing in the box was a disk labeled IBM DOS 3.2.

The Epson MS-DOS 3.30 disk I had been using was fine for booting the machine but because it was only indented as a minimal OS to be used to install the other disks it was missing several important utilities like CHKDSK.  With my uncle’s DOS 3.2 disk I could finally confirm how much memory the machine had.

There was also a disk labeled Lotus 1-2-3, which I had badly wanted to see running on a vintage machine.

There was a time when this screen was a common as the Google homepage to computer users.

Using this machine also taught me a lot about MS-DOS.  Today DOS is remembered as a difficult monster of an OS; cold to use and brutal to configure.  Some of that is true.  Some of that was Apple advertising crud.  But I think a lot of that image of MS-DOS came from the time after about 1988 until the release of Windows 95 (and even a little after) when so many odd tricks had to be crammed into DOS so that it could use more than 640K memory and use new hardware like sound cards that were not supported without strange autoexec.cfg and config.sys changes.  The nonsense you had to go through to use the hardware in your PC had was truly insulting.

However, in the earlier period the Senior Partner belongs to DOS seems almost tame.  You change directories.  You list the files in a directory.  You run a program.  You change drives.  You format a disk.  It almost seems quaint compared to the ordeals that people had using DOS later.  DOS was clearly meant for a machine like the Senior Partner; this was its heyday.   After that point it slowly turned into a curmudgeonly antique.

I remember reading DOS for Dummies and seeing all of these commands the author basically told you you shouldn’t touch with a ten foot pole.  I wondered what had happened for these commands to have been put into the OS and never taken out in the intervening years.  These were things for configuring serial ports and display modes that made made sense on machines like the Senior Partner in the 1980s but were increasingly less relevant as time wore on.  The large group of people who first encountered PCs in the early 90s ran headfirst into this confusing period where DOS was a geological dig of successive eras stacked on top of each other.

To use a machine as old as the Senior Partner seems quaint not just because of it’s age but because it’s so old that DOS actually makes sense.



    • Mark

      I have this very machine that I purchased new at a cost of about $2800 I think. It still works like a champ and I thought the portable printer was amazing at the time. It was the netbook of the day. Hard to believe

  1. Cee-Ell

    “Changing the paper is a snap: lift off the cover; depress a spring release; take out the old roll; and put in a new one.” Supposedly. (From the Digibarn article)

  2. Shirley Duke

    I think I have this same computer – my elderly friends are the original owners (I am waiting to hear from them to confirm model) I saw it Saturday and they want to sell it (along with some other things they have collected) they said this Panasonic all in one was in good working order the last time they opened it. It is now in their environmentally controlled storage. I don’t know what it is worth, can you help- how much did you pay for yours? Are you interested in another one? You can reach me on, I live in Murrieta, CA

  3. Bryan Cass

    Thanks for this great review of a piece of my childhood. I remember my father lugging this beast on vacation, on church retreats, and into every room in the house. When he upgraded to a lighter portable with a blue LCD (I think it was a NEC) the Sr. Partner became the family computer. I remember being told that I couldn’t turn in my papers on the thermal paper because it wasn’t the same size as “normal” paper. This sucker survived 4 boys and was still in regular use into the late 90’s.

  4. Stuart

    We had 2, and I was one of those “salesmen” lugging it all over the country conducting workshops selling our software, a database of health plan rates and benefits. We started with 2 Apple II’s and an IBM 5120, then a few PC’s, and XT or 2, and finally to a Televideo system. Great memories

  5. Andrea

    This was my family’s first computer, I loved this thing so much. What a great trip down memory lane, we had many of those games. If you’re looking for a fun treat, see if you can get “Sleuth” for that computer on floppy disk. It’s a Clue knockoff and it’s awesome.

  6. Pingback: Panasonic y el mundo de la informática y los videojuegos :: El Blog de Manu
  7. Jorge

    Hi, I’ve bought one in ebay, but didn’t have a keyboard, do you anything about the keyboard pinout or other stuff that can help me to try to use other keyboard?? Thanks in advance

  8. Mark

    I still have a Senior Partner I purchased new in 1983 or 84 for $3500. It works great and I have the Easywriter Word Processing disk and storage disk as well as other games etc. It is amazing it still works like new made to last.

  9. Ryo

    Hehe, I picked up one of these from a junk yard today with my 12-year old son. He lived the way it looked. Went online to research and found this post. All dirty and beaten up but powers on. No disks to test.

  10. Chris Jones

    I still have mine that I bought new in the early ’80’s when I lugged it everywhere I went, on vacations, on airplanes, everywhere, to my wife’s chagrin. I used it with PFS File to track the first $25 million in bank deposits of a $100million portfolio in the new bank I helped found…until my partners became embarrassed and offered to buy me the latest, greatest Compaq desktop. I still have all original documentation, even the original boot disk. Are these worth anything as a collectable?

  11. Michael Shults

    What a terrific tribute to this machine! I bought one new for $3,000 and change back, um, when. It had 640K ram and a 10MB hard drive and I thought I’d died and gone to HEAVEN. I carried it between work and home for some years, running LOTUS 1-2-3, D-Base III, and it’s so long ago that I’ve forgotten what word processor I loved in those days.

  12. Red

    I own one of these nice computers. I have the computer itself, it is complete and working. I do not have manuals, complete original disks, or accessories. There were a number of accessories made for this computer I’d like to get my hands on, like the expansion chassis and carrying case. If anyone has any sort of accessories, manuals, disks etc that you’d like to sell, please give me an email.


  13. sean

    I had one of these too during my college days 1985-1989. I left it behind at my parent’s house for a summer and my mother sold it without talking to me.

  14. Howard Dodson

    I lugged one of these to and from work every day in the mid 1980s. I lugged it from my car in the parking lot, up a flight of stairs to the second floor, and down a hallway to my cubicle, and lugged it back when I left work. I never left it at the office, because to me it was a major investment and I was worried about theft. Our company made 100+ people share about 8 IBM PCs that were grouped together, and having my own computer at my desktop was an amazing advantage. After I put my back out lugging it back and forth, I discovered that I should switch hands every 20 steps or so.
    A few years later, after much arguing between the technical staff and the bean counters, our office management finally figured out that people could be much more productive if each person had their own computer, and there was this newfangled thing called a local are network that could make the machines talk to each other. Once I got my own desktop computer, I didn’t have to lug this PC back and forth any more, and it wasn’t long before I replaced it with a computer with a better processor and its own hard drive! I was happy to move on, but I remember I loved using my Senior Partner at the time.

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