Radio Shack TRS-80. Display in price




# Fiction | Radio Shack TRS-80. Display in price March 7, 2013

Radio Shack TRS-80

And where are hiding the computer itself?! It’s just a keyboard with the monitor! In fact of the matter is that Radio Shack TRS-80 was one of the first home computers in the world, and as such had an incredible success. He was born in August 1977, and for the first month of its launch was purchased 10,000 computers. It was not a kit for assembly-oriented radio. All you need, included in the kit and the computer and monitor, and even a small cassette magnitofonchik.

Was it powerful enough? Of course, nowadays, its characteristics do not already able to impress anyone, but at the time TRS-80 was a very decent solution for the home.

Its CPU: 1.77-MHz Zilog Z-80A. Memory (RAM, RAM) in the first version of the standard was 4 kilobytes. In later versions, it was expanded to 16 kilobytes. Attended ports input / output for recorder, video port for the monitor and a special connector for external expansion devices.

Radio Shack TRS-80

Drive: Drive on magnetic tape, ie cassette player. Operating System: BASIC, stitched into the permanent memory (ROM). The computer came with a 12-inch monochrome monitor with “incredible” resolution of 64 x 16 (for on-screen text information). Buy it all can be had for 599 dollars 95 cents U.S. (with monitor). From 1977 to 1981, has sold 200 000 Radio Shack TRS-80, and it was not just a success, but a real triumph!

I must say that in those days, the information is saved and accumulated mainly on cassette tape. Floppy disks (floppy disks) are not sufficiently spread. Drives cost hundreds of dollars, and it’s expensive.

However, within a year after the release of the computer, there was the floppy disk to it (TRS-80 Mini-Disk), but it was worth $ 480 dollars. More expensive than a PC (no monitor), and almost as much as the cost complete Radio Shack TRS-80. One can assume that this new product bought only very passionate connoisseurs of high technology of its time.

After all, even three years later, in 1980, the floppy drive TRS-80 cost about $ 425 U.S.. Well, who would drive the price to purchase a computer? Incidentally, the line printer TRS-80 Line Printer for this computer was worth as much as U.S. $ 1299.

The housing keypad ancient home computer Radio Shack TRS-80 was not provided a single slot for expansion cards. So simply would not find the place of which it was up against.

Some more interesting facts about the old computer for home TRS-80. His first version had a “truncated” keyboard without a separate number pad, running the Level I BASIC, and could boast of only four kilobytes of memory.

Later came the keyboard numeric pad BASIC capabilities were expanded to Level II, and the amount of memory, in accordance with the requirements of the time, has increased as much as four times to 16 kilobytes.

Upgrade efforts of enthusiasts was impossible to perform, as the transition from Level I to Level II demanded integration into the motherboard additional chips and wires. However, the old computer to use at home and did not provide a separate upgrade its user. The basic idea of ​​a TRS-80 in that and was that the buyer pays only once and will not be any more additional costs to bring the computer “to the mind.”

Radio Shack TRS-80

But fans are always amateurs. They always need something to improve and alter beyond recognition. They never are prepared to meet the standard configuration. Was for them has an external expansion interface (Expansion Interface), which can be purchased for an additional $ 299 U.S.. This module is characterized by a pleasant design and system unit resembles a small form factor, “desktop”, then there is one on which to put the monitor.

After connecting to the TRS-80 external extension, the home computer of the late seventies acquired additional ports: port printer port expansion, serial port (optional), the ability to increase the amount of memory up to 32 kilobytes, two connector tape drives, floppy controller drive that allows you to connect up to four drives, the signals for the real time clock.

Radio Shack TRS-80 was not perfect. He was not even close to the most powerful computer of its time. The connection between the keyboard and the monitor was cheap and, for this reason, very fragile. Expansion interface, too, was far from perfect. He sometimes led to system failures and to switch off the system. The only solution was to rewire the connections, but it still had to be able to.

Radio Shack TRS-80

Portable computer TRS-80 is not, but this “insignificant” fact did not prevent the company Radio Shack sell special bags designed to transport it. It took two suitcases: to have the computer and its monitor. Yes, mobility TRS-80 “slightly” inferior to modern tablet.

In 1980 saw the publication of his third version, TRS-80 Model III. In fact it was the development of the same of the first model, but with 48 kilobytes of RAM, and an optional built-in ability to install two floppy disk drives.

I must say that the first model TRS-80 Model I, working around radios and televisions, could cause interference. Therefore, the Federal Communications Commission (FCC) required to correct the problem and restore the machine to the standards.

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