SOLD - 1975 SWTPC 6800 system with non-working CT-82 Terminal

[granz]

LOCAL PICKUP - Due to the troubles with shipping CRT tubes, and fragile electronic devices, I will need the purchaser to pick this up near Greensburg, PA (about an hour East-Southeast of Pittsburgh.)

The outer case of the terminal looks pretty good, but will need some retro-cleaning. More importantly, I tried to test it out. It powered up, and I could hear the fan spinning up. But after a short while, there was a bright flash, a loud bang and a lot of smoke; yep, I let the magic smoke out. 





The computer will remain untested until the buyer receives it. It looks very nice, and inside looks complete. I removed all the cards a couple of years ago so that they could survive a move to our new home. Each card is inside an anti-static bag, and wrapped in bubble wrap, and they are all placed inside the case. The cards look good – see the photos.



Here is an inventory of the parts that are included:

MP-F Chassis & MP-P Power Supply


MP-B Motherboard


MP-C Serial Control Interface


MP-M #1 4K Memory Board


MP-M #2 4K Memory Board


Tanner Computer 64K SS-50 (w/ 22 RAM chips)

MP-L Parallel Interface Board, No Photo


Southeastern Micro Systems DDC-16


MP-S Serial Interface (w/ DB25 connector - needs two wires resoldered)


MP-A Microprocessor / System Board


MP-A2 #1 Microprocessor / System Board (does have the SWTBUG ROM and 6810 RAM, no other EPROM)


MP-A2 #2 Microprocessor / System Board (missing baud rate generator, 6810 RAM and SWTBUG ROM – but does have a 2716 EPROM, configuration switches replaced with jumper wires

For some reason, both of the MP-A2 boards have had the copper traces of the "MP-A2" title in the upper-right corner, and the SWTPC logo right side, just above the DS8835N bus transceivers ground off.

Included is a binder with all the assembly notes, along with many handwritten notes from the person who assembled the system.

I am hoping to get about $400, or better from this, but am willing to fudge on that price for my friends here on S///C forums.

[JKnightandKARR]

I can think of use for that, but i don't need more, very interesting, reminds me of something used in Airwolf or Knight Rider.

[granz]

Just for fun, I decided to look up what something like this should be able to sell for: SWTPC Southwest Technical Products 6809 SS50 Bus Computer

There was only one SWTPC computer in the completed category, and it sold for $2K. Granted, it has an MC6809 rather than an MC6800, but this has way more cards, and more than the full 64K memory that a 6800 can use. That auction also did not include the CT-82 terminal (which can be fixed - most likely just following Chris' guidelines here: https://savagechats.com/index.php?topic=374.0.)

Mike Holly (early computer tech who worked extensively with SWTPC systems) has a page about how to test an SWTPC computer here: https://deramp.com/swtpc.com/HiTerm/Test6800_Index.html , and there are huge amounts of info on these old systems.

After seeing this eBay sale, I would now like to get about $700 for this system. Anyone who is willing to put in some work could easily get a large return for that investment.

[granz]

SOLD - Pending Pick Up.

(I will change the title once he picks it up, and pays.)