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Found 10 results

  1. Hi, I recently purchased a TRS-80 Color Computer model 1 on ebay and have a few questions I'm hoping someone will be able to answer. The unit is an early model with the chicklet keyboard and badge on the left. Cosmetically it is close to near mint condition. However, when I turn it on there are vertical lines in the picture. My Color Computer model 2 does not have these lines. I also noticed that the colors appear washed out on the model 1 as opposed to my model 2. Is this normal for an early model 1, or are some capacitors possibly starting to fail? I also noticed that there is a noticeable buzz coming from the power supply, is that normal? My model 2 does not have this buzz. There is also a loose solder connection on the RF input jack, as when I move the RF cable the picture flickers. Should I just send the unit back for a refund? Thanks.
  2. I have had no luck finding a service manual for the newer 26-3124 Service Manual. Anyone out there have a link or copy? I have one needing some help Mike
  3. I have some Questions about CoCo Cartridges... I bought on eBay a used Multi-Pak Interface, with Three Cartridges, untested... What is the probability of it being damaged, and Damaging my CoCo 2 or CoCo 3 when plugged into to them.. How about Damaged Cartridges?? Damaging a CoCo when plugged in when the Power is OFF, and then Powering up the CoCo?? I am opening up the Multi-Pak, and will check that the Power Supply is putting out the correct Voltage, on the correct Lines, and check the other lines for Damaging Voltage.. I bought the Cartridges to see if they could have an EPROM installed, so I could make a Custom Cartridge.. The Cartridges are Skiing, Color Baseball, and Demolition Derby. The Skiing cartridge's label is half missing, so I carefully removed it, and opened the Cartridge.. There are Two 24 pin ROM's?? Made the 8th Week, of 1981 with a Motorola Copyright Symbol, and appear to be an SCM90807P which I can find no reference to on the Internet.. Does anyone know if these can be replaced with an EPROM, and which EPROM it would be??? Since this is the first CoCo Cartridge I have opened, would guess this is a 16K ( 2 x 8K ) game cartridge.. I have found some references to the Motorola MCM 68766C and it appears that they could directly replace the ROMs in the CoCo.. This page mentions the ROM in the Commodore VIC-20/C64. My EPROM Burner is a Needhams EMP-20, and supports the 68764/68766 as well as the 27Cxxxx series and many others.. There are some individuals in the Apple ][ world that are making Apple ][ Prototype Cards.. Does anyone here know if there is anyone making CoCo Prototype Cartridges??? MarkO
  4. From the album: My Game Collection

    I recently Acquired this one from a friend, through some trading. It has some slight yellowing, but not too much. It came with a floppy drive controller. (Apr, 22, 2018)
  5. I just bought this unit today. It is an original 4K version of the Color Computer 1. After fiddling with the inner RF box, I finally got a nice picture and the unit does seem pretty much untouched, even though the tamper sticker and screw under it was missing. I've tried a few cartridges I had laying around, but so far it doesn't want to play them. At most I get garbage on the screen or just a green screen, even after cleaning a few times. I'm hoping it's just a case the carts I am trying are too big for this unit's 4K of RAM. I have a slightly later unit with the 32K of RAM, but I always figured I would pick up an early 4K version if I found one in decent shape. And yes, it is only running Color Basic 1.0!
  6. I just finished reading "CoCo: The Colorful History of Tandy's Underdog Computer" by Boisy Pitre and Bill Loguidice. About two months ago, I knew very little about the history of the Tandy/Radio Shack (TRS) line of computers. What I did know, was basically gleamed from browsing the Radio Shack catalogs in the late 1970s and early 1980s that my amateur radio licensed father would receive in the mail and seeing them on display at the local Radio Shack store (sadly, now closed) in the Ocean County Mall. I did spend an inordinate amount of time during my high school years using a TRS-80 computer, albeit remotely, as my favorite go-to BBS growing up was the JSTBBS (Jersey Shore Telecommunication Breadboard System) running on a TRS-80. Fast forward to Vintage Computer Festival East 10 in April 2015, where my wife Lucy and I (ok, mostly me) had an Atari 8-bit Home Computer display setup. Boisy Pitre stopped by our exhibit and we talked about vintage computers and Atari. He told me about his Liber809 product which is a Motorola 6809 upgrade for the Atari 8-bit computes. He also mentioned his book "CoCo: The Colorful History of Tandy's Underdog Computer", which I told him I would read. While I was looking for "CoCo: The Colorful History of Tandy's Underdog Computer" on Amazon, I came across "Priming the Pump: How TRS-80 Microcomputer Enthusiasts Helped Spark the PC Revolution" by David and Theresa Welsh. I decided to read "Priming the Pump" first since it went back to the beginning of the history of the Tandy/Radio Shack (TRS) line of computers. Once I completed "Priming the Pump", I ordered and read "CoCo: The Colorful History of Tandy's Underdog Computer". These two books cover much of the history of the Tandy/Radio Shack (TRS) line of computers. "Priming the Pump" comes across as two disjointed repetitive autobiographies merged together with the early history of microcomputers, it does provide some insight into running an early software business by the seat of your pants. Boisy's book is a well researched and his passion for the brand really shine through. He provides great detail on the cast of characters around the development of the TRS Color Computer models and related technologies as well as the leaders in the CoCo user community from the beginning through to the early 2000s. He also provides insight into the goings on at Tandy/Radio Shack corporate. I read the printed book which has many black and white photographs. I believe that the eBook version has color photographs. I actually used YouTube to go view some of the Color Computer demos, demos, demos that were mentioned toward the end of the book. I enjoyed reading this book, it has a lot of great early computer history. Regards, Bill
  7. http://www.l-com.com/audio-video-rg59a-coaxial-cable-rca-male-f-male-60-ft I've seen mentions of F-Type/RCA adapters, but I was wondering if a CoCo 2 will work with one of these for display on a coax input on a TV. I like the all-in-one-ness of this solution if it will work.
  8. Like the title says. Does anybody know of a label variation guide for Color Computer cartridges? I collect the earlier CoCo 1 carts with the title in a colored bar next to a TRS-80 logo. I know many CoCo 1 carts also came in a plain white "Tandy" end label variation, and I've got a few of those that I'm looking to swap out for the earlier style. But, I'm not certain if they all even exist. (Specifically, I'm talking about Dungeons of Daggorath, Downland, Stellar Life Line, and Demolition Derby. I know I've seen the first three in the "TRS-80" variation, but I don't know about Demo Derby.)
  9. ALERT! ALERT! ALERT! http://www.glensideccc.com/cocofest/index.shtml I count 60 days between now and CoCoFEST!, to be held May 4-5 of 2019 in Lombard, IL. Time will _NOT_ stand still for anyone -- THIS MEANS YOU!! Have you reserved your hotel room? If not, do so now by calling 630-629-1500 and mentioning "Glenside CoCoFEST!" in order to get the special overnight room rate at the Fairfield Inn of $94 plus 11% (total $104.34). Act now, because rooms have sometimes sold-out in the past... Have you registered as an exhibitor? Only a few tables remain... http://www.glensideccc.com/data/library/cocofest_exhibit/contract-2019.doc Even if you are not exhibiting, will you help to control the check-in lines by pre-registering? Do your part! https://www.tandylist.com/registration.aspx -- OR -- http://www.glensideccc.com/data/library/cocofest_exhibit/generaladmission-2019-blank.doc This is our big event, the CoCo New Year! I'll see you there!! ALERT! ALERT! ALERT!
  10. Wasn't sure where to put this since it isn't Tandy-specific. That and it's retro, yet new at the same time: In other news, here's a working link for Windows port of the original 1982 version: https://www.blitter.com/~nebulous/otherworld/DoD.zip
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