PRODPIC-34229.jpg' alt='Trs 80 Model 3 Service Manual' title='Trs 80 Model 3 Service Manual' />The TRS80 Micro Computer System TRS80 later known as the Model I to distinguish it from successors is a desktop microcomputer launched in 1977 and sold by Tandy. Brown, a 40yearold selfdescribed Tesla fanatic, died in May 2016 when his Model S sedan rammed into the side of a trailer on a bigrig truck that was turning left. TRS 8. 0 Color Computer Wikipedia. The Radio. Shack. TRS 8. 0 Color Computer also marketed as the Tandy Color Computer and affectionately nicknamed Co. View and Download Radio Shack TRS80 Model 100 basic manual online. BASIC Language Lab. TRS80 Model 100 Desktop pdf manual download. Enter your model number to make sure this fits. Trophy red dot 1 x 25mm Easy target acquisition 3 MOA, Dotreticle Note Bushnell. View and Download Radio Shack TRS80 Model 4 technical reference manual online. Microcomputer. TRS80 Model 4 Desktop pdf manual download. Model 931A Power System Analyzer Operation Manual. Co is a line of home computers based on the Motorola 6. The Color Computer was launched in 1. SummaryeditDespite bearing the TRS 8. Color Computer is a radical departure from the earlier TRS 8. Motorola 6. 80. 9E processor, rather than the TRS 8. Zilog Z8. 0. Thus, despite the similar name, the new machine is not compatible with software made for the old TRS 8. The Motorola 6. 80. E was an advanced processor for the time, but was correspondingly more expensive than other, more popular, microprocessors. Competing machines such as the Apple II, Commodore VIC 2. Commodore 6. 4, the Atari 4. Atari 8. 00 were designed around the much cheaper MOS 6. Some of these computers were paired with dedicated sound and graphics chips and were much more commercially successful in the 1. The Tandy Color Computer line started in 1. Co. Co 1 and ended in 1. Co. Co 3. All three Co. Co models maintained a high level of software and hardware compatibility, with few programs written for the older model not running on the newer ones. The death knell of the Co. Co was the advent of lower cost IBM PC clones. Origin and historyedit. The TRS 8. 0 Video. Tex Terminal, circa 1. The TRS 8. 0 Color Computer started out as a joint venture between Tandy Corporation of Fort Worth, Texas and Motorola Semiconductor, Inc. Austin, to develop a low cost home computer in 1. The initial goal of this project, called Green Thumb, was to create a low cost Videotex terminal for farmers, ranchers, and others in the agricultural industry. This terminal would connect to a phone line and an ordinary color television and allow the user access to near real time information useful to their day to day operations on the farm. Motorolas MC6. 84. Video Display Generator VDG chip was released about the same time as the joint venture started and it has been speculated that the VDG was actually designed for this project. At the core of the prototype Green Thumb terminal, the MC6. MC6. 80. 9 microprocessor unit MPU, made the prototype a reality by about 1. Unfortunately, the prototype contained too many chips to be commercially viable. Motorola solved this problem by integrating all the functions of the many smaller chips into one chip, the MC6. Synchronous Address Multiplexer SAM. By that time in late 1. Motorola MC6. 80. The SAM, VDG, and 6. Ag. Vision terminal was born. The Ag. Vision terminal was also sold through Radio Shack stores as the Video. Tex terminal around 1. Internal differences, if any, are unclear, as not many Ag. Vision terminals survive to this day. With its proven design, the Video. Fsquirt.Exe For Windows 7 there. Tex terminal contains all the basic components for a general purpose home computer. The internal modem was removed, and IO ports for cassette storage, serial IO, and joysticks were provided. An expansion connector was added to the right side of the case for future enhancements and program cartridges Program Paks, and a RAM button a sticker indicating the amount of installed memory in the machine covers the hole where the Modems LED DATA indicator had been. On July 3. 1, 1. 98. Tandy announced the TRS 8. Color Computer. Sharing the same case, keyboard, and layout as the Ag. VisionVideo. Tex terminals, at first glance it would be hard to tell the TRS 8. Color Computer from its predecessors. Tandy viewed businesses as its primary market for computers. Although the companys Ed Juge said in 1. Color Computer was our entry into the home computer market, he described it as for serious professionals, stating that a word processor and spreadsheet would soon be available. The initial model catalog number 2. B of Dynamic Random Access Memory DRAM and an 8 k. B Microsoft BASIC interpreter in ROM. Its price was 3. 99 USD. Within a few months, Radio Shack stores across the US and Canada began receiving and selling the new computer. Differences from earlier TRS 8. The Color Computer, with its Motorola 6. E processor, is very different from the Zilog Z8. TRS 8. 0 models BYTE wrote that The only similarity between the two computers is the name. Indeed, the 8. TRS 8. Z8. For a time, the Co. Co was referred to internally as the TRS 9. However, this was dropped and all Co. Cos sold as Radio Shack computers were called TRS 8. Like its Z8. 0 based predecessors, the Co. Co shipped with a version of BASIC. Tandy licensed Microsoft BASIC as with the Z8. BASIC. The original Co. Co offered standard Color BASIC and Extended Color BASIC. This was further extended by a Disk Extended Color BASIC ROM included in the floppy controller. The Co. Co 3 included Super Extended Color BASIC as standard, deploying extensions added by Microware. Third party floppy controller ROMs, such as J M System JDOS, and DSS Peripherals Disk Controller, enabled the use of double sided disk drives. The Co. Co is designed to be attached to a color television set, whereas the Z8. The Co. Co also features an expansion connector for program cartridges mostly games, although the EDTASM assembler is a cartridge and other expansion devices, such as floppy disk controllers and modems. In this way it is similar to the Atari 2. Atari 8 bit computers, and other cartridge capable systems. Tandy released a Multi Pak Interface which allowed switching quickly among four cartridges. This is similar in concept to the Model Is Expansion Interface. Unlike some Z8. 0 models, the Co. Co did not come with a built in floppy drive. The Co. Co is designed to save and load programs and data from a standard audio cassette deck. Tandy eventually offered a floppy disk drive controller for the Co. Co as a cartridge. Both the Co. Co and earlier TRS 8. WD1. 7xx series floppy disk controllers and 3. Floppy disk access would briefly halt the entire system while waiting for data. Even with the add on floppy drive, the Co. Co did not have a true DOS until third party operating systems such as TSC FLEX9 distributed for the Co. Co by Frank Hogg Laboratories and Microwares multi user, multi tasking OS 9 were available. However, a disk based Co. Co does contain Disk Extended Color BASIC on an internal ROM in the controller cartridge that gives the BASIC user the ability to save and load programs from the disk and store and retrieve data from disk in various ways. Some non program expansion cartridges include a soundvoice synthesizer which led to the Co. Co being used as an accessibility device for the disabled,3 3. RS2. 32 pack the internal serial port was merely one bit of a parallel port, a hard drive controller, stereo music adapter, floppy disk controller, input tablet, and other accessories. Some of this hardware was designed and marketed by third party mail order houses, including a Disto Super Controller a floppy controller, with space for an optional serial port or SCSI interface in the same enclosure. The Co. Co was the first Tandy computer to have a mouse available for it instead of following the IBM PCMicrosoft standard, this mouse was electrically the equivalent of an analogue joystick. VersionseditThere were three versions of the Color Computer Color Computer 1 1. TRS 8. 0 Color Computer from 1.