Editing Tandy 2000 (section)

{{More citations needed|date=May 2023}}
{{Short description|Personal computer by Radio Shack}}
{{Infobox computer
|Name = Tandy 2000
|logo = Tandy computer logo.svg
|logo_upright = 0.5
|Photo = File:Tandy 2000.png
|Type = [[Personal computer]]
|Released = {{Start date and age|1983}}
|Discontinued = 1988
|price = {{ubl|2000: $2750 (two floppy drives, 128&nbsp;KB RAM)|2000HD: $4250 (one drive, 10&nbsp;MB hard drive, 256&nbsp;KB RAM)<ref>{{cite web|title=first Tandy Model 2000 computer catalog entry 1984 RSC-11|url=http://www.radioshackcatalogs.com/html/catalogs_extra/1984_rsc-11/h004.html|website=radioshackcatalogs dot com|accessdate=May 23, 2016}}</ref>|$249 extra for monochrome monitor}}
|Processor = Intel 80186
|CPUspeed = 8 MHz
|Memory = 128–768&nbsp;KB (896&nbsp;KB with mods)
|storage = 10&nbsp;MB hard drive, one or two 720&nbsp;KB 5.25-in floppy drives
|OS = [[MS-DOS|MS-DOS 2.11.03]], [[Xenix]]
|display = Text 25 rows by 80 columns, character matrix in RAM is modifiable
|graphics = Monochrome 640×400 pixels with intensity bit or eight RGB colors with intensity, 640×400 (both optional)
|predecessor = [[TRS-80]] [[Zilog Z80|Z80]]-based series
|successor = [[Tandy 1000]] series
}}
The '''Tandy 2000''' is a [[personal computer]] introduced by [[Radio Shack]] in September 1983 based on the 8&nbsp;MHz [[Intel 80186]] [[microprocessor]] running [[MS-DOS]].<ref name=derfler>{{cite news
  | first = Frank
  | last = Derfler
  | title = Tandy 2000: A superior machine and a good value
  | url = https://books.google.com/books?id=wi4EAAAAMBAJ&pg=PA71
  | work = [[InfoWorld]]
  | publisher = 
  | page = 71
  | date = 1984-06-18
  | accessdate = 2016-05-04
  | quote = 
}}</ref> By comparison, the [[IBM Personal Computer XT|IBM PC XT]] (introduced in March 1983) used the older 4.77&nbsp;MHz [[Intel 8088]] processor, and the [[IBM Personal Computer/AT|IBM PC/AT]] (introduced in 1984) would later use the newer 6&nbsp;MHz [[Intel 80286]]. Due to the 16-bit data bus and more efficient instruction decoding of the 80186, the Tandy 2000 ran significantly faster than other PC compatibles, and slightly faster than the PC AT. (Later IBM upgraded the 80286 in new PC AT models to 8&nbsp;MHz, though with [[wait state]]s.) The Tandy 2000 was the company's first computer built around an Intel x86 series microprocessor; previous models used the [[Zilog Z80]] and [[Motorola 6809]] CPUs.

While touted as being compatible with the [[IBM Personal Computer XT|IBM XT]], the Tandy 2000 was different enough that most existing PC software that was not purely text-oriented failed to work properly.

The Tandy 2000 and its special version of MS-DOS supported up to 768&nbsp;KB of RAM, significantly more than the 640&nbsp;KB limit imposed by the IBM architecture. It used 80-track double-sided [[Disk density#5¼-inch media|quad-density]] floppy drives of 720 KB capacity; the IBM standard at the time of the introduction of the Tandy 2000 was only 360&nbsp;KB.

The Tandy 2000 had both "Tandy" and "TRS-80" logos on its case, marking the start of the phaseout of the "TRS-80" brand.