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This mini forum is intended to provide a simple means of discussion about the Panasonic JR-200U computer. If you want to share your own experience or memories, or add relevant information about this system: post a message!

  Click Here to add a message in the forum


Sunday 28th September 2014
Marq (Finland)
Discovering the Panasonic JR-200U

The Service Manual is now available at Vintage Volts. All in all, a lot more has been discovered about the machine. My current guess is that the CPU runs at 1.366 MHz.

Sunday 17th November 2013
Lance Lindell (United States)

Hello, I want to let enthusiasts know that there is currently a mint Panasonic JR-200U listed on eBay by user ID seattlegoodwill. They are very reputable and seem to always have a good stock of "old computers." Save it from the landfill! Lance

Friday 16th March 2012
Marq (Helsinki, Finland)

I''ve been trying to hack the JR-200UP for some time now and have discovered a thing or two (the technical manual WOULD have been a nice addition...) See the findings here:$1270

Tuesday 11th October 2011
Robert Saler (Toronto, CANADA)

This message is for J. Mitch Hopper - I recently bought a Panasonic JR-200 but with no manuals. Cute little computer, but I am going to need manuals to figure anything out.
I see from the postings that you have docs - could you please email them to me at
Cant do anything without them - sorry for the trouble.
Thanks - Robert

Thursday 22nd September 2011
Clocky (Australia)

I have a JR-200U and need any information I can find, could you please email me the manual to J. Mitch Hopper?

Thanks in advance.

Wednesday 17th August 2011
J. Mitch Hopper

Note to athansoft:
Alas, I forgot to send you the manual. Very sorry for the delay. Just sent it.

Thursday 27th January 2011

My email is Thank you J. Mitch Hopper. I am waiting for your pdf files

Thursday 20th January 2011
J. Mitch Hopper

I have manuals. If you want them, post a message here with contact info. I will email the PDF on request.

Tuesday 18th January 2011
athansoft (Greece)

I have a Panasonic JR-200UP but without manuals. Could anyone sent me photocopies or pdf file of it and I''ll pay him. Thank you

Sunday 8th August 2010
J. Mitch Hopper

I have a JR-200 new-in-the-box with manuals. Looking over the detailed memory map,I see that it is exactly the same as the Radio Shack CoCo - right down to the free, unassigned space.

Sunday 22nd December 2002
Michael (United States)
Panasonic JR-200u Purgatory Page

For the most in-depth information available on the JR-200u visit:

Saturday 6th April 2002
James the Animal Tamer (Internet)
James the Animal Tamer's Emulators

Emulator resides on

I'd need the technical or development docs to make the emulator better.

Friday 29th March 2002
Hafthor Stefansson (Earth)

I still have an old Panasonic JR-200U that I bought from J&R Music World in
NY in 1984 or so. For the day, it was actually a pretty nice little machine.
32KB, better graphics than the CoCo, but still not very good, a Motorola
6802 processor, fairly decent sound, an independent timer (which is how it
ended up as a fancy alarm clock for me for a couple of years). I didn't get any peripherals with it, but I did have the cassette cable and used a crappy little Radio Shack cassette recorder to save/load my programs. I had no software except for the stuff I wrote myself, but it was still a great first computer. I never really figured out how the MON debug monitor thingy worked.
Also, I never got a real owners manual. When J&R shipped it to me, it was missing the manual all together. After several phone calls, they agreed to send one. What I got was a Xerox copy of the manual. That kinda sucked, but
it worked.

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