Apple 2 skärmar
All the machines in the series, except the IIc, share similar overall design elements. You can extend your desktop across two or more displays, and choose which display shows the Finder and application menu. It has the distinction of being the longest-lived Apple computer of all time—it was manufactured and sold with only minor changes for nearly 11 years. The motherboard holds eight expansion slots and an array of random access memory RAM sockets that can hold up to 48 kilobytes.
The Apple IIc was released in April , billed as a portable Apple II because it could be easily carried due to its size and carrying handle, which could be flipped down to prop the machine up into a typing position. When the Disk II floppy disk drive was released in , a new operating system, Apple DOS , was commissioned from Shepardson Microsystems [ 12 ] [ 13 ] and developed by Paul Laughton, adding support for the disk drive.
Apple marketed the Apple II as a durable product, including a ad in which an Apple II survived a fire started when a cat belonging to one early user knocked over a lamp. During its lifespan two variations were introduced: the Apple IIe Enhanced four replacement chips to give it some of the features of the later model Apple IIc and the Apple IIe Platinum a modernized case color to match other Apple products of the era, along with the addition of a numeric keypad.
The Disk II interface, created by Steve Wozniak , was regarded as an engineering masterpiece for its economy of electronic components. Rod Holt designed the Apple II's power supply.
Så ansluter du mer än en skärm till din Mac med M1 eller M2
It uses a bit microprocessor, the 65C operating at 2. Our most advanced Spatial Audio system ever. It was the first of three Apple II models to be made in the Snow White design language , and the only one that used its unique creamy off-white color. There was also a third-party card that would allow OS-9 Level One to be run. Responsive, precision eye tracking. It became one of several recognizable and successful computers during the s and early s, although this was mainly limited to the US.
It was aggressively marketed through volume discounts and manufacturing arrangements to educational institutions, which made it the first computer in widespread use in American secondary schools, displacing the early leader Commodore PET. The effort to develop educational and business software for the Apple II, including the release of the popular VisiCalc spreadsheet , made the computer especially popular with business users and families.
There were small differences in the physical appearance and keyboard. The Apple II's multiple expansion slots permitted a wide variety of third-party devices, including Apple II peripheral cards such as serial controllers , display controllers, memory boards, hard disks, networking components, and realtime clocks. To reflect the computer's color graphics capability, the Apple logo on the casing was represented using rainbow stripes, [ 20 ] [ 21 ] which remained a part of Apple's corporate logo until early The earliest Apple IIs were assembled in Silicon Valley , and later in Texas; [ 22 ] printed circuit boards were manufactured in Ireland and Singapore.
The first Apple II model , that gave the series its name, was designed by Steve Wozniak , and was first sold on June 10, The Apple II was a major advancement over its predecessor, the Apple I , in terms of ease of use, features, and expandability. Eventually, Apple II accelerator cards were created to double or quadruple the computer's speed. Revolutionary dual-chip performance. The Apple II computers are based on the 8-bit processor and can display text and two resolutions of color graphics.
The video controller displayed 40 columns by 24 lines of monochrome, upper-case-only the original character set matches ASCII characters 0x20 to 0x5F text on the screen, with NTSC composite video output suitable for display on a TV monitor, or on a regular TV set by way of a separate RF modulator. More pixels than a 4K TV. For each eye. Later, the II GS gained the ability to read and write Macintosh disks and, through third-party software, a multitasking Unix-like shell and TrueType font support.
A model with more advanced graphics and sound and a bit processor, the Apple II GS , was added in Unlike preceding home microcomputers, the Apple II was sold as a finished consumer appliance rather than as a kit unassembled or preassembled. Learn more. Two different monochrome LC displays were sold for use with the IIc's video expansion port, although both were short-lived due to high cost and poor legibility.
Rather than having a dedicated sound-synthesis chip, the Apple II had a toggle circuit that could only emit a click through a built-in speaker; all other sounds including two, three and, eventually, four-voice music and playback of audio samples and speech synthesis were generated entirely by software that clicked the speaker at just the right times. This discouraged the copying or modifying of the software on the disks, and improved loading speed.
A software-controlled speaker provides one channel of low-fidelity audio. He employed a switched-mode power supply design, which was far smaller and generated less unwanted heat than the linear power supply some other home computers used. The Apple II series eventually supported over 1, software programs. In these models, Apple made the necessary hardware, software and firmware changes in order to comply to standards outside of the US.
The Apple II Plus was followed in by the Apple IIe, a cost-reduced yet more powerful machine that used newer chips to reduce the component count and add new features, such as the display of upper and lowercase letters and a standard 64 KB of RAM. The machine had no slot 0, but instead had an auxiliary slot that could accept a 1 KB memory card to enable the column display. Over the course of the Apple II series' life, an enormous amount of first- and third-party hardware was made available to extend the capabilities of the machine.
The graphics are significantly improved, with colors and new modes with resolutions of × and × This, combined with the 's ability to execute 65C02 code directly, provides full support for legacy software, while also supporting bit software running under a new OS. The OS eventually included a Macintosh-like graphical Finder for managing disks and files and opening documents and applications, along with desk accessories.
Unlike modern portables , it lacked a built-in display and battery.
How to connect two or more external displays to an M1, M2, or M3 MacBook
The plastic case was designed to look more like a home appliance than a piece of electronic equipment, [ 11 ] and the case can be opened without the use of tools. If more than two displays are connected, you can specify that some use video mirroring and others use an extended desktop. The IIc was designed as a compact, portable unit, not intended to be disassembled, and cannot use most of the expansion hardware sold for the other machines in the series.