Apple I

Desktops/Apple 2014. 8. 23. 14:03

History

The original Apple Computer, also known retroactively as the Apple I, or Apple-1, was designed and hand-built by Steve Wozniak. Wozniak's friend Steve Jobs had the idea of selling the computer. The Apple I was Apple's first product, and to finance its creation, Jobs sold his only means of transportation, a VW Microbus, and Wozniak sold his HP-65 calculator for $500. It was demonstrated in July 1976 at the Homebrew Computer Club in Palo Alto, California. The Apple I went on sale at a price of US$666.66, because Steve Wozniak "liked repeating digits" and because of a one-third markup on the $500 U.S. wholesale price. About 200 units were produced and all but 25 were sold during nine or ten months. Unlike other hobbyist computers of its day, which were sold as kits, the Apple I was a fully assembled circuit board containing about 60+ chips. However, to make a working computer, users still had to add a case, power supply transformers, power switch, ASCII keyboard, and composite video display. An optional board providing a cassette interface for storage was later released at the cost of $72 U.S. The Apple I's built-in computer terminal circuitry was distinctive. All one needed was a keyboard and an inexpensive television set. Competing machines such as the Altair 8800 generally were programmed with front-mounted toggle switches and used indicator lights (red LEDs, most commonly) for output, and had to be extended with separate hardware to allow connection to a computer terminal or a teletypewriter machine. This made the Apple I an innovative machine for its day. In April 1977 the price was dropped to $475 U.S. It continued to be sold through August 1977, despite the introduction of the Apple II in April 1977, which began shipping in June of that year. Apple dropped the Apple I from its price list by September 1977, officially discontinuing it. As Wozniak was the only person who could answer most customer support questions about the computer, the company offered Apple I owners discounts and trade-ins for Apple IIs to persuade them to return their computers.


Generral

OVERVIEW

IntroducedApril 1976
DiscontinuedSeptember 1977
Initial Price$666.66
Support StatusObsolete

PROCESSOR

ProcessorMOS Technology 6502
Processor Speed1 MHz
Architecture8-bit
Number of Cores1

STORAGE AND MEDIA

StorageNone
MediaOptional Cassette Interface

KEYBOARD

KeyboardNone


Software

SOFTWARE

Original OSApple Integer BASIC with optional Cassette Interface

FIRMWARE

Languages in MemoryNone


Memory and Graphics

MEMORY

Built-in Memory4 KB
Maximum Memory8 KB (on-board) 65 KB (via Expansion connector)
Memory Slots16-pin, 4K Dynamic, type 4096 (2104)

GRAPHICS

Graphics Memory1 KB
Display ConnectionComposite positive video
External Resolution40 × 24 characters, hardware-implemented scrolling


Connections and Expansion

CONNECTIONS

Dual In-line Package (DIP)1 - for ASCII encoded keyboard
DisplayComposite positive video

EXPANSION

Slots1 - 44-pin Expansion connector, 1 - Cassette Board connector

POWER

Maximum Continuous Power58 W
Line Voltage8 to 10 Volts AC (RMS) @ 3 amps, 26 to 28 Volts AC (RMS) Center-Tapped, 1A


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