TRS-80

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TRS-80 was a trademark of Tandy Corporation . It originally served as the name of the company's first microcomputer , the Tandy TRS-80 Model 1, and was an abbreviation for Tandy RadioShack (TRS), the company's electronics store chain, and for the Z80 (80) microprocessor used .

The name TRS-80 was later used for different Tandy computer models, although these were not necessarily compatible with each other. TRS-80 could also be maliciously read as Trash-80.

Original system and successor

TRS-80 Model 1

TRS-80 Model 1

The original TRS-80 was this model, later renamed the TRS-80 Model 1. The developer, Steve Leininger, developed this computer for Tandy because he was of the opinion that the do-it-yourself computers customary at the time were not for the masses, as only a few people could solder themselves. The TRS-80 was one of the first fully assembled computers to be manufactured and sold in large numbers.

Sales year:	1977-1981
CPU:	Z80 @ 1.7 MHz
Storage	4 KB - 48 KB
Operating system:	TRSDOS, LDOS, NewDOS / 80

TRS-80 Model III

TRS-80 Model III

The TRS-80 Model III was an evolution of the Model 1 and was largely (but not completely) compatible with the Model 1.

Sales year:	1980-1983
CPU:	Z80A @ 2 MHz
Storage	4 KB - 48 KB
Operating system:	TRSDOS, LDOS

TRS-80 Model 4

TRS-80 Model 4

The TRS-80 Model 4 was an evolution of the Model III and was fully compatible with the Model III.

Sales year:	1983-1991
CPU:	Z80A @ 4 MHz
Storage	64 KB - 128 KB
Operating system:	TRSDOS, CP / M

TRS-80 Model 4P

TRS-80 Model 4P

The TRS-80 Model 4P was a portable version of the Model 4.

Sales year:	1983-1985
CPU:	Z80A @ 4 MHz
Storage	64 KB - 128 KB
Operating system:	TRSDOS, LDOS, CP / M

Office computer

TRS-80 Model II

Although the TRS-80 Model 1 was not intended for professional use, there was strong demand from business customers. In order to better serve this market, the TRS-80 Model II (based on the Z80 microprocessor) was developed and accordingly advertised and sold as a “business computer”. The TRS-80 Model 12 (also based on the Z80 microprocessor) replaced the TRS-80 Model II in 1983.

At an overlapping time, the TRS-80 Model 16 came onto the market in 1982 as the successor to the TRS-80 Model II, which now had a 16-bit Motorola 68000 microprocessor in addition to the Z80 microprocessor . This enabled the Unix variant XENIX to be used as the operating system in addition to the existing software . The TRS-80 Model 16 and its successor, the TRS-80 Model 16B , became popular computers with a wide range of office and management software.

Home computers

• Tandy TRS-80 Color Computer ("CoCo") - A home computer developed together with Motorola on the basis of the 6809
• TRS-80 MC-10 - Save Home Computer to face the Sinclair ZX81 / Spectrum to compete

Portable calculator

• Tandy TRS-80 Model 100 - OEM version of the Kyocera Kyotronic 85

Tandy TRS-80 PC (Sharp PC-1210)

• Handheld computers
• Tandy TRS-80 PC (also known as PC-1) - OEM version of the Sharp PC1211
• Tandy TRS-80 PC-2 - OEM version of the Sharp PC-1500
• Tandy TRS-80 PC-3 - OEM version of the Sharp PC-1250
• Tandy TRS-80 PC-4 - OEM version of the Casio PB-100
• Tandy TRS-80 PC-5 - OEM version of the Casio FX-780P
• Tandy TRS-80 PC-6 - OEM version of the Casio FX-790P
• Tandy TRS-80 PC-7 - OEM version of the Casio FX-5200P
• Tandy TRS-80 PC-8 - OEM version of the Sharp PC-1246

In addition to the computers, all peripherals and software were also linked to the TRS-80 brand between 1977 and 1984.

Web links

Commons : TRS-80  - collection of pictures, videos and audio files

Individual evidence

1. ^ The Lost Tribes of RadioShack: Tinkerers Search for New Spiritual Home. In: wired.com. Retrieved April 7, 2020 . 
2. ↑ Radio Shack Polishes Its Image. In: InfoWorld. Retrieved April 7, 2020 . 
3. ↑ The world's first shop PC: 40 years of the TRS-80. In: Milestones in electronics / electronics practice. Retrieved April 8, 2020 . 
4. ↑ How we sold over 100,000 TRS-80 Model I Systems. In: Computerworld (advertisement dated October 15, 1979). Retrieved April 8, 2020 . 
5. ↑ The TRS-80 Model III. In: trs-80.org. Retrieved April 8, 2020 . 
6. ^ The TRS-80 Model 4. In: trs-80.org. Retrieved April 8, 2020 . 
7. ↑ Radio Shack introduces its second TRS-80 computer breakthrough. In: Computerworld (advertisement dated Oct 15, 1979, page 31). Retrieved April 8, 2020 . 
8. ↑ TRS-80 Model II. In: trs-80.org. Retrieved April 8, 2020 . 
9. ↑ The Model II - time for support? In: Microcomputing Magazine (August 1982). Retrieved April 8, 2020 . 
10. ↑ The TRS-80 Model II. In: claranet.nl. Retrieved April 8, 2020 . 
11. ↑ Tandy Revamps Product Line. In: Infoworld (March 1985, page 28). Retrieved April 8, 2020 . 
12. ↑ Information at the Pocket Computer Museum