To operate model iii software, the model 4 contains a model iii rom. Theres a builtin way to load trsdos the main model iii disk operating system. Definitive list of trs80 model ii operating systems pski software. The following documents were found from various locations on the web.
Model 3 comes with the option of dual motor allwheel drive, 20 performance wheels and brakes and lowered suspension for total control, in all weather conditions. If you ran xenix you could attach two terminals of course you used the trs80 dt1 terminal to the system for a total of three working positions. I offer thanks to those that spent the time scanning these. Newdos80 is a disk operating system for the model i and model iii trs80 made by apparat, inc. As with the model i, other thirdparty sources also offered trsdos alternatives for the model iii, including newdos, alphabits multidos, and micro systems softwares dosplus. This software consisting of a set of patches and a conversion program will enable you to continue to use your trsdos 6. As we communicated in april, this includes a limited range of.
None of them used the model iii trsdos disk format, but they did. For that i need trsdos 6 or ldos 6, which know how to trigger the model 4 mode that pages out the model 3 rom in bank 0 and replace it with ram. Therefore, before making a backup or copying edas files from the diskette, you will need to change one byte of the trsdos 2. Trsdos is the operating system for the tandy trs80 line of 8bit zilog z80 microcomputers. Visicalc for model 3 1980 software arts see other formats. The three disks containing the model i pascal system do not contain trsoos 2. Version 2 of trs80 model 4 rom adapter marks tech journal.
Model iii operation and basic language reference manual, the model iii manual for short. The model ii was succeeded by the compatible trs80 model 12, model 16 and model 16b and the tandy 6000. Trs80 dos newdos80 ira goldklangs trs80 revived site. Radio shack begins as a onestore retail and mailorder company catering to ham operators and electronics buffs. If it is, youll need to find and transfer the gocmd program. Newdos86 was written by australian software author warwich sands. I previously designed a small adapter board to allow a regular 2764 eprom to be plugged into a trs80 model 4 gate array version only in place of rom chip u4, in order to use the new autobooting feature of the frehd hard disk emulator. So, i need a way of copying the finished program executable to the model ii for testing. I got a copy off the model ii lsdos disk image from my misosys software page. The model 4 looked a lot like the model 3, and even contained the model 3 roms. They are known as the model i, model ii, model iii, model 4, model 4p, model 4d, model 12, model 16 and model 6000. The model 4p versions of newdos80 have a special modelaiii rom image file that allows them to boot on the model 4p. The model iii release has many of the features found in operating systems of today like pcdos.
The magic happened when you booted up a model 4 dos. Ever since i got a model 4p, over a year ago, ive been scratching my head how to move software onto it. But what always intrigued me was the missing link, the trs80 model ii. Definitive list of trs80 model ii operating systems.
Newdos80 is a disk operating system for the model i and model iii trs80 made by apparat. After you download and install the emulator, youll see this screen if you see complicated technical information on the right side of the screen, you can hide it with the f5 key the simplest way to get started is to boot into cassette basic. A collection of manuals, pamphlets, information leaflets and other materials regarding the tandy trs80. The model 16 came with trsdosii, trsdos16 and a 68000 machine code editorassembler. It ran at 4 mhz and displayed 80 columns x 24 lines in model 4 mode, but was fully compatible with the trs80 model 3 and in model 3 mode actually displayed 64x16 and ran at the model 3 s 2 mhz. I worked indirectly for logical systems, the company that produced ldos and later, after i left model 4 trsdos. Just hit the t key when the drive 0 screen is showing. The 4p versions will boot on a model iii, 4 or 4p system. Radioshack sold logical systems ldos operating system which could control these types of drives. Color computer 3 ntscpal version with 512k expansion ram card catalog number. Like trsdos for the model iii, it was derived partially from trsdos for the model ii. Your model 3 will soon receive new software that matches the model 3 standard range configuration you ordered.
The bottom line the trs80 model 4 is more of a business computer than the model iii, and many are being bought as executive computers. A great deal of pages have been written about this machine, no need for me to add another one. In a previous life, i used to be an operating system programmer for the radio shack trs80 model i and model iii. This version is pretty much a model 1 version of trsdos 1.
The model 4 has a faster z80a 4 mhz cpu, larger video display of 80 columns by 24 rows, bigger keyboard, and can be upgraded to 128kb of ram. Trs80 revived site by ira goldklangs is an archive of everything related to the tandy radio shack trs80 microcomputer lines. The trs80 model 4 ref 26106869 was one of the last models of the trs80 series and perhaps the less known. You can load floppies in other drives 1 3 and run programs. Tesla vehicles regularly receives overtheair software updates that add new features and functionality. That can be used to launch model iii games on a model iv. I have an old pentium box that i was going to run an emulator on and write the disks, but this should be more manageable. Model ii includes a comprehensive reference manual and a diskette that contains the very powerful model ii interpretive basic language and trsdos disk operating system.
The version posted here is a percom doubler patched version, anyone with an original version please contact me. The next trick was to get the documentctl files off the model ii trsdos 2. That then gives a full 64kb of ram starting at address zero, which allows cpm to run on the model 4 too. Model is retrofitted with double density controllers and models iiii equipped with 80 track drives or doublesided drives could not use trsdos.
I love my model ii, but actually using it for software development would. The model iii is basically an upgrade of the model i, which was released three years earlier. Trs80 model iii uart serial card alternative all about. Then look up the hex table in the back of the model iii operation and basic. The normal boot sector sector 1 is modified with 3 bytes located by the hardware in checking for a trsdos or ldos disk. Backgammon 124695, 1, cmd, bill miller, trsdos, autorun. None of them used the model iii trsdos disk format, but they did support many of the trsdos 1.
Radio shack created another version of trsdos for the model iii, which ended up as trsdos 1. The model i operating systems newdos, dosplus, ldos, and multidos were rewritten for the model iii. It includes a disk basic which is compatible with model i disk basic, and can run almost all the same programs. Model i trsdos users will find difficulty in reading the distribution disk due to the data address mark used for the directory. Hardware floppy drive ira goldklangs trs80 revived site. Dear internet archive community, ill get right to it. Ldos is an advanced operating system developed for the trs80 model iii or model 4 in the model iii mode by logical systems. Compare the features of the model 4 personal desktop computer to any other computer in its class. It is compatible with model iii software and cpm application software. For power, versatility and convenience, youll find model 4 is a true price breakthrough. From 1983 diskequipped trs80 model 4 computers used trsdos version 6, which was a development of model iii ldos by logical systems, inc. Hard disk drives are supplied with their own driver software, and are usually installed. Either disk may be placed in drive 0 and used as a system disk.
The machine swapped out the boring old rom for 64k of ram, allowing it to run cpm as well as trsdos 6. The version posted here is a percom doubler patched version, anyone with an. The network 3 system software gives each student station access to the. Use the disk manual as the primary source of information.
This last was updated in 1987 and released as lsdos 6. Later tandy introduced the models iii and 4, wonderful machines you could upgrade to if your model i gave up the ghost. The diskette is now configured such that the hardware assumes it is an ldos diskette with the rom starting on track 30 decimal, once. It offers the trs80 user manu features and enhancements that are not included in trsdos. The network 3 connects up to 16 trs80 model iii student stations to a host model iii. This involves adding information to the gat sector and changing the data address marks on. Additional programming languages are also available.
Its release forced the few developers of model ii software to start all over again, green said, because customers would not want to run z80 software. Again, the model 1 comments probably apply to the model 3 version. John freire came by the digibarn in december 2004 bringing this wonderful donation, a sterling trs80 model iii 3 which was converted into a model iv 4 by radio shack for him. Mar 18, 2018 but i wont be able to confirm that until i boot up in model 4 mode. First of all, it adds data transportability you can read ldos diskettes on a trs80 model i, or on a model iii or 4. The built in serial file transfer utilities of trsdos 2.
I have a trs80 model iii and if you guys remember trs80 s, some had rs232 serial communication cards with uarts. Now emulates diskbased model iii using phillips v1. When an update is available, youll be notified on the center display with an option to install immediately, or schedule the installation for a later time. With the svd, you can boot a tremendous number of different operating systems on your trs80 model 3 4. This page is a simplified version of david keils application software page.
The user password has been eliminated, but all other passwords remain. I offer thanks to those that spent the time scanning these docs as it is a time consuming and thankless job. Trstools supports most trs80 operating systems and all file dating schemes, including the extended dating schemes of ldoslsdos and multidos, and my new dating scheme that transparently extends lsdosldos file dates to 2079. Trs80 disk software page games last updated on may 11, 2001. It has the same cpu, but it is faster, has more memory, and the floppy drives hold twice as much data, although the model i could be upgraded to some of these features. Simply pass the name of the game program to runn in model iii mode as a parameter for the go command. Trstools for windows a freeware utility to manage trs80. Many pc disk controllers have difficulty reading double density disks formatted by older releases of trs80 operating systems, even with the proper software on the pc. With support for hard drives and compatibility with the model 4s trsdos. You may want to make sure zork is not a model iii game. Indeed this is a very early model iii number 3 but it has internals of the model iv more ram etc but retains the silver color of the iii the iv was white. I already have working versions of trsbox for model ii lsdos 6 and model 16 xenix, but given that trsdos 2.
Service manual for the tandy trs80 model 100 portable computer catalog numbers 263801 and 263802 topics. Trs80 model 1iii4 4p application software page last updated on april 8, 2005. Site contains emulators, programs, manuals, books, patches, games, hints, discussions, questions, forums, and tons more. The job control language permits it to work unattended after business hours. Model 4 can run all model iii trsdos and ldos programs in model iii mode. 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 trs80, but an entirely different system. Requires the 8mhz 68000 cpu board found in the 6000. However, booting the model 3 4 from the svd is a bit of a challenge. Tesla will soon downgrade software on the entrylevel model 3. Almost everyone who had a diskbased model iii had a copy of model iii trsdos.
Trs80 software page disk operating systems classiccmp. Trsdos tandy radio shack disk operating system est le nom du systeme d exploitation. Software for the trs80 model iv from the trs80 archives. Connect your vehicle to your homes wifi network for the fastest possible download time. The model i trsdos command shell supported a number of internal commands, as documented by the trsdos 2. Just put a copy of it on whatever games disks you create. If you turned the machine on without a diskette in it, it would boot up just like a model 3. This could run some but not all model i software, and used a different disk format. Now that my trs80 model 16 is up and running with a hard disk emulator drem, i decided to do a quick demo running trsdos 4. For the most part, all the comments in the model 1 section of the page apply.
Later diskequipped model iii computers used a completely different version of trsdos by radio shack which culminated in 1981 with trsdos version 1. The trsdos operating system includes the software and inputoutput functions needed to operate the trs. Unfortunately, my trs80 is a base model so it has no rs332 serial communication card. If you started in cassette only you may be prompted to reset the emulator. Tandy corporation introduced the trs80 model 4 in april 1983 as the successor to the trs80 model iii. Sharp 80 is designed to be powerful but easy to get stated with the basics. I added the zip files, contents listings and some archives. It turns out that the version of convcmd that came with model ii lsdos 6. And a carbon fiber spoiler improves stability at high speeds, all allowing model 3 to accelerate from 060 mph in as little as 3. Im starting to look into developing a version of trsbox for the trs80 model ii trsdos 2. The model 16 can run either trsdos 16 or trsxenix, a variant of xenix, microsofts version of unix. Definitive list of trs80 model ii operating systems pski.
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