HARD DISK LIMITS

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One of the most frustrating problems a lot of DIY enthusiasts came up against was BIOS problems that prevented the use of larger capacity disks. In the early days, DOS version 1 which came on a floppy with our original PC could not even use directories. All saved files had to be saved in the …

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BIOS BEEP CODES

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The IBM PC 5150 and more recent personal computers all use a BIOS beep code to report certain error states. The short beep is followed by loading the operating system from floppy disk or hard disk. 1 short beep is normal 2 short beeps, POST code is shown on screen no beep, power problem or …

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IBM 5150 PERSONAL COMPUTER

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The IBM PC was released on August 12, 1981.  The machine is model 5150 and the monochrome monitor is model 5151. The desktop design is rather common in the CRT era as monitors were generally placed on top the machine. We bought one of the IBM PC machines in 2001 as the machine was much …

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DONKEY KONG

Donkey Kong was released on July 9, 1981 by Nintendo who also developed the game. Donkey Kong is a puzzle game. This game was so wildly popular it made Nintendo a literal fortune selling 60,000 units. The game introduces the character Mario, The gameplay is the move along along the platform while avoiding the barrels being …

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FROGGER

Frogger was released on June 5, 1981 by Sega. The game was developed by Konami. Frogger is a puzzle and strategy game. The game starts with three, five, or seven frogs (lives), depending on the settings used by the operator. No game in North America ever was set above 3. The player guides a frog which …

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DEFENDER

Defender was released circa February 1981 by Williams who also developed the game. Defender is a shoot’em-up arcade game. Defender is a two-dimensional side-scrolling shooting game set on the surface of an unnamed planet. This game really developed the genre of side scrolling games for many years. The player controls a space ship as it navigates …

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CRYOGENIC NITROGEN

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Cryogenic nitrogen systems are widely used industrially. Smaller systems can produce 10 liters a day and larger systems can produce 1000 liters an hour. Some  videos with enthusiasts achieving extreme clock speeds have been published. 30 liter dewar flasks are a standard container for handling liquid nitrogen. The can maintain the liquid with minimal losses …

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BATTLEZONE

Battlezone was released circa November 1980 by Atari who also developed the game. Battlezone is a first person tank shooter. Battlezone is a game where the player fought other tanks in a wireframe 3D game world. The game had a goggle visor which some consider the origin of virtual reality. The game action could also be …

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EPSON MX-80 DOT MATRIX PRINTER

The MX printers were the original line of printers introduced by Epson. The 11″ MX-80 and the larger sized MX-100 with a 15″ carriage suitable for wider print forms. The majority of users purchased the MX-80 which could use fanfold 8½” by 11″ paper. IBM chose the Epson MX-80 to accompany its introduction of the IBM …

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MICROSOFT DECATHLON

Microsoft Decathlon was released on 1980 by Microsoft who also developed the game. Microsoft Decathlon is a sports simulation game. This game was originally released in 1980 for the TRS-80 machine. The PC version was released in 1981 for DOS by IBM. Microsoft Decathlon simulates the Olympic sports game with 10 distinct events. The game is played …

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