Mac286

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The Mac286 was an Intel 80286-based MS-DOS coprocessor expansion card for one of Apple Computer's first expandable Macintosh computers, the 1987 Macintosh II. It was developed by Phoenix Technologies under contract to Apple Computer and sold by AST Research in an effort to close the gap between the Macintosh and IBM PC computing worlds. AST also introduced the related Mac86 card for the Macintosh SE.

Intel 80286

The Intel 80286 is a 16-bit microprocessor that was introduced on February 1, 1982. It was the first 8086-based CPU with separate, non-multiplexed address and data buses and also the first with memory management and wide protection abilities. The 80286 used approximately 134,000 transistors in its original nMOS (HMOS) incarnation and, just like the contemporary 80186, it could correctly execute most software written for the earlier Intel 8086 and 8088 processors.

MS-DOS Discontinued computer operating system

MS-DOS is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and some operating systems attempting to be compatible with MS-DOS, are sometimes referred to as "DOS". MS-DOS was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system.

Coprocessor

A coprocessor is a computer processor used to supplement the functions of the primary processor. Operations performed by the coprocessor may be floating point arithmetic, graphics, signal processing, string processing, cryptography or I/O interfacing with peripheral devices. By offloading processor-intensive tasks from the main processor, coprocessors can accelerate system performance. Coprocessors allow a line of computers to be customized, so that customers who do not need the extra performance do not need to pay for it.

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By 1989, AST had left the Apple market and sold the rights and technologies for the Mac286 and Mac86 cards to Orange Micro. Orange Micro would later make a successful line of coprocessor cards based on the 80x86 processor family, before leaving the coprocessor market to concentrate on USB and FireWire products.

Orange Micro Inc. was a computer hardware company which made products for use with Apple computers. The company made a variety of products for many machines, ranging from the Apple II series to the Macintosh line. The company went out of business in 2004.

In 1992, Orange Micro discontinued the Mac286 board. Support for the card was discontinued sometime later.

Mac86

The Mac86 was designed for the Macintosh SE PDS slot, and integrated a 10 MHz Intel 8086 CPU. The Mac86 did not include its own RAM, instead sharing up to 640 KB of the host Macintosh's RAM. A floppy drive controller was integrated, including an external bracket to connect an Apple PC 5.25 Drive.

Macintosh SE

The Macintosh SE is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1987 to October 1990. It marked a significant improvement on the Macintosh Plus design and was introduced by Apple at the same time as the Macintosh II.

Processor Direct Slot

The Processor Direct Slot or PDS, introduced by Apple Computer, in several of their Macintosh models, provided a limited measure of hardware expandability, without going to the expense of providing full-fledged bus expansion slots.

Intel 8086 16-bit central processing unit

The 8086 is a 16-bit microprocessor chip designed by Intel between early 1976 and June 8, 1978, when it was released. The Intel 8088, released July 1, 1979, is a slightly modified chip with an external 8-bit data bus, and is notable as the processor used in the original IBM PC design, including the widespread version called IBM PC XT.

Mac86 box front AST Mac86 box front.png
Mac86 box front
Mac86 box back AST Mac86 box back.png
Mac86 box back

The Mac286 hardware

There are three distinct versions of the Mac286 hardware:

NuBus

NuBus is a 32-bit parallel computer bus, originally developed at MIT and standardized in 1987 as a part of the NuMachine workstation project. The first complete implementation of the NuBus was done by Western Digital for their NuMachine, and for the Lisp Machines Inc. LMI Lambda. The NuBus was later incorporated in Lisp products by Texas Instruments (Explorer), and used as the main expansion bus by Apple Computer and NeXT. It is no longer widely used outside the embedded market.

Of the three versions, the AST appears to be the most common.

Details

Phoenix Technologies company

Phoenix Technologies Ltd is an American company that designs, develops and supports core system software for personal computers and other computing devices. The company's products – commonly referred to as BIOS or firmware – support and enable the compatibility, connectivity, security and management of the various components and technologies used in such devices. Phoenix Technologies and IBM developed the El Torito standard.

The Mac286 software provides emulation of the following additional hardware:

Color Graphics Adapter computer display standard

The Color Graphics Adapter (CGA), originally also called the Color/Graphics Adapter or IBM Color/Graphics Monitor Adapter, introduced in 1981, was IBM's first graphics card and first color display card for the IBM PC. For this reason, it also became that computer's first color computer display standard.

Hercules Graphics Card

The Hercules Graphics Card (HGC) is a computer graphics controller made by Hercules Computer Technology, Inc. that combines IBM's text-only MDA display standard with a bitmapped graphics mode. This allows the HGC to offer both high quality text and graphics from a single card. The HGC was very popular, and became a widely supported de facto display standard on IBM PC compatibles connected to a monochrome monitor. The HGC standard was used long after more technically capable systems had entered the market, especially on dual-monitor setups.

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Tandy 1000

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Apple IIe Card

The Apple IIe Card is a compatibility card which allows compatible Macintosh computers to run software designed for the Apple II series of computers. Released in March 1991 for use with the LC family, Apple targeted the card at its widely dominated educational market to ease the transition from Apple II-based classrooms, with thousands of entrenched educational software titles, to Macintosh-based classrooms.

Amiga 2000 home computer

The Amiga 2000, or A2000, is a personal computer released by Commodore in March 1987. It was introduced as a "big box" expandable variant of the Amiga 1000 but quickly redesigned to share most of its electronic components with the contemporary Amiga 500 for cost reduction. Expansion capabilities include two 3.5" drive bays and one 5.25" bay that can be used by a 5.25" floppy drive, a hard drive, or CD-ROM once they became available.

Macintosh II

The Macintosh II is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1987 to January 1990. It is the first model of the Macintosh II family, and the first Macintosh to support a color display. When first introduced, a basic system with 20 MB drive and monitor cost US$5,498. With a 13-inch color monitor and 8-bit display card the price was around US$7,145. This price placed it in competition with workstations from Silicon Graphics, Sun Microsystems, and Hewlett-Packard.

Power Macintosh G3

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Macintosh XL modified version of the Apple Lisa personal computer made by Apple Computer, Inc.

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PowerBook G3 line of laptop Macintosh computers

The PowerBook G3 is a series of laptop Macintosh personal computers designed, manufactured and sold by Apple Computer, Inc. from 1997 to 2001. It was the first laptop to use the PowerPC G3 (PPC740/750) series of microprocessors, and was marketed as the fastest laptop in the world for its entire production run. The PowerBook G3 was succeeded by the PowerBook G4.

Macintosh Quadra 950

The Macintosh Quadra 950 is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1992 to October 1995. It replaced the Quadra 900 that was introduced several months earlier, increasing the CPU clock rate of its 68040 CPU from 25 MHz to 33 MHz, and improving the graphics support. The two computers were otherwise identical, including the price. With a Macintosh Processor Upgrade Card installed, this computer is known as the Power Macintosh 950.

Power Macintosh 6100

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Applied Engineering

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Macintosh Quadra 605

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The Amiga computer can be used to emulate several other computer platforms, including legacy platforms such as the Commodore 64, and its contemporary rivals such as the IBM PC and the Macintosh.

Macintosh hardware

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A compatibility card is an expansion card for computers that allows it to have hardware emulation with another device. The most popular of these were for Macintosh systems that allowed them to emulate Windows PCs via NuBus or PCI. Apple Computer made many of these cards (including a compatibility card for the Apple IIe. Later, Orange Micro made them, but by the end of the 1990s, greater application availability made such cards obsolete. Besides PC compatibility cards, others existed, such as the 3DO Blaster for PCs.

IBM Personal Computer XT

The IBM Personal Computer XT, often shortened to the IBM XT, PC XT, or simply XT, is a version of the IBM PC with a built-in hard drive. It was released as IBM Machine Type number 5160 on March 8, 1983. Apart from the hard drive, it was essentially the same as the original PC, with only minor improvements. The XT was mainly intended as an enhanced IBM PC for business users. Later floppy-only models would effectively replace the original model 5150 PC. A corresponding 3270 PC featuring 3270 terminal emulation was released later in October 1983. XT stands for eXtended Technology.

Macintosh LC

The Macintosh LC is a personal computer designed, manufactured, and sold by Apple Computer, Inc. from October 1990 to March 1992.

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