The level 1 was soon replaced by a 16k level ii system. By early november of 1977, radio shack was delivering 16k ram units with 5 digit serial numbers that had been. The model 4 was fully compatible with model iii software and industrystandard cpm applications software. Big80 is an implementation of a trs80 model 1 in an fpga. Color computer 3 ntscpal version with 512k expansion ram card catalog number. Absolute memory address peek 124461, 1, src, larry ashmun, autorun. I had so much fun with it that it gave me the motivation to complete a degree in computer science.
With physical dimension which seem like a disadvantage, the software and additional features make up for it. The output of the trs 80 was 5 volts to power the optoisolator, and a standard 2 volt composite video signal. The 16 line by 64 character video is memory mapped from 3c00h to 3fffh. The model 1, 3 and 4 are a line of compatible computers. You must have trs80 software that will support this setting. The trs80 model 1 monitor was actually a black and white rca television set with most of the guts taken out. There are some interesting tid bits in there if you are willing to dig, but the vast majority of this book was autobiographical on the authors who wrote some software for the trs 80 and told the story of what it was like to be a programmer and sell software. Software for the trs80 model iv from the trs80 archives. Try them in the trs 80 or system 80 emulators and marvel at what could or could not be achieved in 48k of ram. My trs80 emulators, like most emulators, use virtual disk images rather than actual floppy disks or hard drives. They were originally released on cassette, but later we produced disk versions as well.
Software for the trs 80 model iv from the trs 80 archives. The trs80 micro computer system trs80, later renamed the model i to distinguish it from successors is a desktop microcomputer launched in 1977 and sold by tandy corporation through their radioshack stores. There were a number of doss available for the trs 80 family. Trs 80 revived site by ira goldklangs is an archive of everything related to the tandy radio shack trs 80 microcomputer lines. Like the smaller and lighter original pc 1, the pc2 was also designed by sharp, who released their own version, the pc1500. It had faster z80a 4 mhz cpu, a larger video display 80 columns x 24 rows, bigger keyboard, and could be upgraded to 128kb of ram. Jan 02, 2020 big 80 is an implementation of a trs 80 model 1 in an fpga. We have 38 radio shack trs 80 manuals available for free pdf download. System 80 and trs 80 model 1 driving instructions this page is for all those people unfamiliar with the system 80 and its equivalents but who want to know how to operate the beast, either so they can boot up a real one, or at least follow the documentation in the various emulators available on this site and so try some of the software. We have 38 radio shack trs80 manuals available for free pdf download. I have already tried radio shack national parts line and they told me.
Now emulates diskbased model iii using phillips v1. This option requires no additional software, and works with almost all trs. But, you could mix and match memory at 128k, 256k, 384k, 512k, 768k and 1mb increments where the limit is mostly determined by the number of available slots in the computer. Newdos 80 is a disk operating system for the model i and model iii trs80 made by apparat, inc. This post describes the processor environment including the cpu itself, ram, rom and hooking it up to the video controller, keyboard and virtual cassette player to make a working trs 80. The three models were partly compatible with one another, and incompatible with most everything else. The keyboard is memory mapped from 3800h to 38ffh, using the layout in the table below. In mid1980, the broadly compatible trs80 model iii was released. Never terribly popular, as its internal memory map was not softwarecompatible with the model i. Clicking on the picture below or here will bring you to my trs80 emulator. The tandy color computer line started in 1980 with what is now called the coco 1 and ended in 1991 with the more powerful coco 3. The trs80 micro computer system is a desktop microcomputer launched in. It also includes max 80, genie iii, lnw 80, system 80, and model 4 cpm, although those systems are incidental and are not really part of the archive.
Trs80 revived site by ira goldklangs is an archive of everything related to the tandy radio shack trs 80 microcomputer lines. Special optimization techniques were used, allowing a 16mhz 386sx to emulate a trs 80 at normal speed. Also included is the 250baud system tape for loading edtasm on a model 1 level 1. Search the trs80 software archive ira goldklangs trs80. The readonly memory chips contain the basic interpreter software. Basically, a model i with an expansion interface and optional floppy drives built into the cabinet. Jan 19, 2016 when the original radio shack trs 80 color computer was released in 1980, it was sold as either a 4k or 16k system. It is one of the earliest massproduced and massmarketed retail home computers.
Search the trs80 software archive ira goldklangs trs. Radio shacks second pocket computer is no pocket computer it is much too large and heavy. Os could now use 16k from the 68000 memory on a model 16 so it did not require a hda on these machines. Model 4 library catalog 1 for model iv dsk david sampson 19xx baslbr10. The trs80 model ii was a computer system launched by tandy in october 1979, and targeted at the smallbusiness market despite its name, the model ii was not an upgrade of the original model i trs 80, but an entirely different system. The successor to the model iii was the trs 80 model 4 april 1983, with 4 written as an arabic numeral. Tandy releases the trs 80 model 2000, which uses the intel 80186 microprocessor. The trs80 model 4 is software compatible with the model ill so that owners of either system can take advantage of the large number of programs available. Trstools for windows a freeware utility to manage trs80 disk images trstools is a windows explorerlike utility that makes it easier to work with virtual disk images. Place this unique instrument on a map, chart, or plan of any size. The radio shack trs80 model 4 microcomputer is an enhanced version of radio shacks popular trs80 model ill microcomputer. The following documents were found from various locations on the web. When i was in high school in the late 1970s, he purchased a trs 80 model 1 on which i learned to program in basic. Trs 80 model 1 iii44p cassette software page last updated on april 8, 2005.
I offer thanks to those that spent the time scanning these docs as it is a time consuming and thankless job. Apparently there was a switch which disabled the cpm memory map allowed. Having lived through the trs 80 from model 1 through to the end of days of the line, i was hoping for much more in this book than i got. The holmes vid80 was a popular addon for the trs 80 model i and iii. These boards require at a minimum a 128k matching memory board. I offer thanks to those that spent the time scanning these. Trs 80 cassette software page last updated on may 11, 2001. Please choose your search criteria from the boxes below. Fcc regulations as of january 1, 1981 regarding electromagnetic interference. Many software publishers issued patches to permit their model i. Bitmap string function demonstration 124849, 1, bas, autorun. It changed the trs 80 memory map to allow running the cpm operating system. It provides vga video and ps2 keyboard so as to be usable with commonly available hardware todate well, ps2 keyboards are becoming rare, but it works with a usbtops2 adapter as well.
The model 4s memory mapping and os more closely resemble the trs80 model ii than it does the model iii. Trs 80 memory and port map the next step in building big 80 was to setup the cpu and connect it to some ram, rom and all the previously. Big 80 is an implementation of a trs 80 model 1 in an fpga. Trs80 model 1616b6000 mc68000 cpu board spotters guide. Like the model ii, there is no rombased os and all os software was ramresident and loaded from disk at bootup.
By 1979, the trs80 had the largest selection of software in the microcomputer market. Definitive list of trs80 model ii operating systems. Never terribly popular, as its internal memory map was not softwarecompatible with the model 1. This unit plugged into the expansion port on the computer. This part of the website contains my entire collection of trs 80 model 1 system 80 software in 80 track, singlesided,singledensity disk images. Until 1982, the trs 80 was the bestselling pc line, outselling the apple ii series by a factor of five according to one analysis. Those trs initials came, of course, from tandy radioshack. The mxs consists of four modules set up as a stackable set.
Until 1982, the trs80 was the bestselling pc line, outselling the apple ii series by a factor of 5 according to one analysis. This post describes the keyboard controller which processes keys through 4 simple but distinct stages. The model i designation didnt arrive until the summer of 1979, when tandy introduced trs 80 model ii. Trs 80 bar code reader wand 261183 works with kyocera kc85. This site is the result of an effort to preserve color computer software and documentation. This post describes the processor environment including the cpu itself, ram, rom and hooking it up to the video controller, keyboard and virtual cassette player to make a working trs80. The radio shack trs 80 microcomputing system catalog number 261001, later known as the trs 80 model i, was introduced by radio shack on august 3, 1977. Welcome to the humongous trs80 archives, a humongous collection of trs80 related sites, books, magazines and software. Trs80 in an fpga keyboard controller topten software blog. Worldwide distribution was done by computer news 80 in the u. I am trying to locate either a service manual, owners manual or both for a trs 80 voice synthesizer. Note that in this document, trs 80 refers to either a model 1 or 3. Radio shack unveils the trs 80 model 12 at the cpm 83 show. Sold it all in 1982 after i built a lnw 80 trs80 model 1 clone kit.
This page is the main search page for trs 80 model i, iii, and 4 software. Tandyradio shacks trsdos was generally regarded as being pretty crummy. Documentation trs80 model 1 34 emulator for windows. This emulator can map your pc drive as a real trs80 boot drive and can aid in transferring data from a trs80 disk to an ibm.
Basically, a model 1 with floppy drives and an expansion interface built into the cabinet. Heres a nice full color ad that we placed in several magazines. Frequently asked questions here are a few frequently asked questions on the radio shack trs 80 model i, model iii, and model 4. The trs 80 model ii was a computer system launched by tandy in october 1979, and targeted at the smallbusiness market despite its name, the model ii was not an upgrade of the original model i trs 80, but an entirely different system. Radio shack trs80 model 4 technical reference manual pdf. Memory map, disassemblyassembly, theory of operation, troubleshooting, parts lists. Trs80 model i 48k level ii system bring up and repair.
Tandy releases the trs80 model 2000, which uses the intel 80186 microprocessor. Trs80 in an fpga cpu, ram and rom topten software blog. In mid1980, the broadly compatible trs 80 model iii was released. Jan 08, 2020 big80 is an implementation of a trs80 model 1 in an fpga. Site contains emulators, programs, manuals, books, patches, games, hints, discussions, questions, forums, and tons more.
My readwrite tools for the catweasel floppy disk controller have moved to their own page. Since the video display took its power from the same power supply as the floppy drives, the image. The trs 80 maps keyboard switch states into a range of memory addresses which when read, have particular bits set for particular keys. Trs80 memory and port map the next step in building big80 was to setup the cpu and connect it to some ram, rom and all the previously created. Around the summer of 20 i bought a number of old computers from a retired professor in nj.
Trs 80 model ii disk operating system reference manual. This page is the main search page for trs80 model i, iii, and 4 software. They are known as the model i, model ii, model iii, model 4, model 4p, model 4d, model 12, model 16 and model 6000. Software keyboard to get around limits of pc keyboards. Could load data from cassette tape at a mindnumbing 1500 bits per. Mostly, but not entirely, software compatible with the model 1. Frequently asked questions here are a few frequently asked questions on the radio shack trs80 model i, model iii, and model 4. The name is an abbreviation of tandyradioshack, z80 microprocessor. By 1979, the trs 80 had the largest selection of software in the microcomputer market. Since the video display took its power from the same power supply as the floppy drives, the image on the display could noticeably shrink during disk access. Trs 80 model 1 software library radio shack 261506 portfolio analysis micro com. The model 1, in its level ii basic configuration, consists of a z80 processor running at 1. It expanded the trs 80 screen from 64 characters wide by 16 characters high to the larger 80 characters wide by 24 characters wide. Trstools for windows a freeware utility to manage trs80.
The radioshack trs 80 color computer later marketed as the tandy color computer and sometimes nicknamed the coco is a line of home computers based on the motorola 6809 processor. Book listing basic typein programs for the tandyradio shack trs 80 model 100 portable computer. The model 100 bcr drivers work on the kyo 85, and may even work with the olivetti m10 and the nec machines, assuming you know what the differences in the memory maps are. Trs 80 network interface card tandy model ii arcnet software archive. So, you can build the base module first, which will give you a 32k memory expansion for your trs 80 model 1, as well as a power conditioning base that the other boards use. When the original radio shack trs 80 color computer was released in 1980, it was sold as either a 4k or 16k system. Trs80 revived site by ira goldklangs is an archive of everything related to the tandy radio shack trs80 microcomputer lines.
Also included is the 250baud system tape for loading edtasm on a model 1 level 1 system. Later, a 32k model would be available, and the microsoft color basic would give about 24k of free memory with the rest of the memory used by the video display, cassette buffers, basic input buffer, etc. The trs 80 model 1 monitor was actually a black and white rca television set with most of the guts taken out. The trs80 model 1 monitor was actually a black and white rca television set with most of. The trs 80 short for tandy radio shack z 80 was radio shacks entry into the consumer microcomputer market. Expansion options also went beyond just trs80 model 1 compatibility and fixing. Ive finally created a memory map database and imported my original nec. I still have a couple of trs 80 5 1 4 inch floppy disks from a college course in the late 1970s. Find great deals on ebay for trs 80 model 1 when you shop the largest online selection at. The model ii was succeeded by the compatible trs80 model 12, model 16 and model 16b and the tandy 6000.
There were a number of doss available for the trs80 family. Trs80 bar code reader drivers for model 100200 and. Only uppercase characters could be displayed, and the only means of storage was a cassette recorder. It is generally easier to use ordinary digits for the model 1, model 2 and model 3. This particular model 1 has 16kb ram, an expansion interface, and three floppy drives. These are z 80 based machines that were first introduced in 1977. Instantly run any program below in a trs80 javascript emulator. Additional trs 80 resources heres a collection of odds and ends that didnt seem to fit elsewhere on my trs 80 pages. Additional trs 80 resources heres a collection of odds and ends that didnt seem to fit elsewhere on my trs80 pages. It made computer history as one of the first mass marketed, fully assembled microcomputers. Trs 80 model i 48k level ii system bring up and repair this is the story of bringing up and repairing a trs 80 that had not been powered on in 30 years.
Included is the original model 1 version plus the later version that was modified for the model iii4. The program also emulates some unusual trs 80 hardware, such as a model 1 doubler, trs 80 joystick, hardware clock, and hard drive. Instantly run any program below in a trs 80 javascript emulator. Although the lower case characters were present in the character set, the model i lacked the extra memory chip needed to store the bit corresponding to lower case. One floppy isnt quite working and the monitor crackles like a bowl of rice krispies, but the system works great otherwise. Tips on creating software that runs across multiple modelt platforms, posted. Big five produced nine games for radio shacks model 1 3 trs 80 computers. The intent is to make it the final of a series of prototypes trs80hdd and trs80gs and a memory expansion module. Trs80 dos newdos80 ira goldklangs trs80 revived site. Doubleduty was written by randy cook, the author of the first version of trsdos for the original model i. He told roach, charles tandy himself, and lewis kornfeld, president of. Never terribly popular, as its internal memory map was not software compatible with the model 1. The first version offered, known as the model 1, had a blackandwhite display with character mode graphics, and could not support a disk drive or more than 16k of memory without adding on a special expansion interface that.
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