Компьютерная техника. Еремина Н.В. - 41 стр.

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• IBM AT
George Orwell didn't foresee the AT in 1984. Maybe it was because Big Blue,
not Big Brother, was playing its cards close to its chest. The IBM AT set new
standards for performance and storage capacity. Intel's blazingiy fast 286 CPU
running at 6 MHz and 16-bit bus structure gave the AT several times the performance
of previous IBM systems. Hard drive capacity doubled from 10 MB to 20 MB (41
MB if you installed two drives - just donut ask how they did the math), and the cost
per megabyte dropped dramatically.
New 16-bit expansion slots meant new (and faster) expansion cards but
maintained downward compatibility with old 8-bit cards. These hardware changes
and new high-density 1.2-MB floppy drives meant a new version of PC-DOS (the
dreaded 3.0).
The price for an AT with 512 KB of RAM, a serial/parallel adapter, a high-
density floppy drive, and a 20-MB hard drive was well over $5000 - but much less
than what the pundits expected.
• Commondore Amiga 1000
The Amiga introduced the world to multimedia. Although it cost only $1200,
the 68000-based Amiga 1000 did graphics, sound, and video well enough that many
broadcast professionals adopted it for special effects. Its sophisticated multimedia
hardware design was complex for a personal computer, as was its multitasking,
windowing OS.
• Compaq Deskrpo 386
While IBM was busy developing (would "wasting time on" be a better phrase?)
proprietary Micro Channel PS/2 system, clone vendors ALR and Compaq wrestled
away control of the x86 architecture and introduced the first 386-based systems, the
Access 386 and Deskpro 386. Both systems maintained backward compatibility with
the 286-based AT.
Compaq's Deskpro 386 had a further performance innovation in its Flex bus
architecture. Compaq split the x86 external bus into two separate buses: a high-speed
local bus to support memory chips fast enough for the 16-МНг 386, and a slower I/O
bus that supported existing expansion cards.
• Apple Macintosh II
When you first looked at the Macintosh II, you may have said, "But it looks
just like a PC. "You would have been right. Apple decided it was wiser to give users
a case they could open so they could upgrade it themselves. The monitor in its 68020-
powered machine was a separate unit that typically sat on top of the CPU case.
• Next Nextstation
UNIX had never been easy to use , and only now, 10 years later, are we getting
back to that level. Unfortunately, Steve Job's cube never developed the software base
      • IBM AT
      George Orwell didn't foresee the AT in 1984. Maybe it was because Big Blue,
not Big Brother, was playing its cards close to its chest. The IBM AT set new
standards for performance and storage capacity. Intel's blazingiy fast 286 CPU
running at 6 MHz and 16-bit bus structure gave the AT several times the performance
of previous IBM systems. Hard drive capacity doubled from 10 MB to 20 MB (41
MB if you installed two drives - just donut ask how they did the math), and the cost
per megabyte dropped dramatically.
      New 16-bit expansion slots meant new (and faster) expansion cards but
maintained downward compatibility with old 8-bit cards. These hardware changes
and new high-density 1.2-MB floppy drives meant a new version of PC-DOS (the
dreaded 3.0).
      The price for an AT with 512 KB of RAM, a serial/parallel adapter, a high-
density floppy drive, and a 20-MB hard drive was well over $5000 - but much less
than what the pundits expected.

      • Commondore Amiga 1000
      The Amiga introduced the world to multimedia. Although it cost only $1200,
the 68000-based Amiga 1000 did graphics, sound, and video well enough that many
broadcast professionals adopted it for special effects. Its sophisticated multimedia
hardware design was complex for a personal computer, as was its multitasking,
windowing OS.

       • Compaq Deskrpo 386
       While IBM was busy developing (would "wasting time on" be a better phrase?)
proprietary Micro Channel PS/2 system, clone vendors ALR and Compaq wrestled
away control of the x86 architecture and introduced the first 386-based systems, the
Access 386 and Deskpro 386. Both systems maintained backward compatibility with
the 286-based AT.
       Compaq's Deskpro 386 had a further performance innovation in its Flex bus
architecture. Compaq split the x86 external bus into two separate buses: a high-speed
local bus to support memory chips fast enough for the 16-МНг 386, and a slower I/O
bus that supported existing expansion cards.

       • Apple Macintosh II
       When you first looked at the Macintosh II, you may have said, "But it looks
just like a PC. "You would have been right. Apple decided it was wiser to give users
a case they could open so they could upgrade it themselves. The monitor in its 68020-
powered machine was a separate unit that typically sat on top of the CPU case.

      • Next Nextstation
      UNIX had never been easy to use , and only now, 10 years later, are we getting
back to that level. Unfortunately, Steve Job's cube never developed the software base