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The final version of the Model 4 is the Model 4D (Radio Shack catalog number 26-1070), first sold in 1985. It is a Gate Array desktop machine featuring dual TEC FB-503 disk drives [28] with a capacity of 360KB each (double density sectors, 40 track, double-sided). Rather than using a lever-style latch as had previous Model 4 drives, these ...
Its microprocessor was a faster Z80A 4 MHz CPU. [7] Disk-based Model 4's had 64 KB of RAM standard; an optional bank of additional 64 KB was accessible to applications software using bank switching technology. The Model 4's new hardware features included a larger display screen with 80 columns by 24 rows, inverse video, and an internal audio ...
RadioShack (formerly written as Radio Shack) is an American electronics retailer that was established in 1921 as an amateur radio mail-order business. Its original parent company, Radio Shack Corporation, was purchased by Tandy Corporation in 1962, shifting its focus from radio equipment to hobbyist electronic components sold in retail stores ...
When radio was first adopted by the U.S. Navy, a small, wooden structure placed on deck to house the ship's radio equipment became known as the "radio shack". [2] Today, a radio shack can be anywhere that radio equipment is housed and operated, usually a room such as with amateur radio stations, but for some the entire "shack" may consist of a ...
May 1, 1981 – Radio Shack releases Model III TRSDOS 1.3; April 26, 1983 – Radio Shack introduces TRSDOS Version 6.0 with the new Model 4s; 1984 – Radio Shack releases Version 6.2, the definitive version for the Model 4 [4] 1984 – Logical Systems publishes The Source, the commented assembler source code to TRSDOS 6.2 [1]
Digital antenna array (DAA) is a smart antenna with multi channels digital beamforming, usually by using fast Fourier transform (FFT). The development and practical realization of digital antenna arrays theory started in 1962 under the guidance of Vladimir Varyukhin ( USSR ).
14 x 21 1/4 x 23 1/2 inch The TRS-80 Model II is a computer system launched by Tandy in October 1979, and targeted at the small-business market. It is not an upgrade of the original TRS-80 Model I, but a new system.
Tandy laptops (1 C, 4 P) ... Pages in category "RadioShack" The following 29 pages are in this category, out of 29 total. This list may not reflect recent changes. ...
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related to: digital antenna radio shack catalog number 15 1109 1 4 6