List of IBM PS/2 models

(Redirected from IBM PS/2 Model 56 SX)

The Personal System/2 or PS/2 was a line of personal computers developed by International Business Machines Corporation (IBM). Released in 1987, the PS/2 represented IBM's second generation of personal computer following the original IBM PC series, which was retired following IBM's announcement of the PS/2 in April 1987. Most PS/2s featured the Micro Channel architecture bus—a closed standard which was IBM's attempt at recapturing control of the PC market. However some PS/2 models at the low end featured ISA buses, which IBM included with their earlier PCs and which were widely cloned due to being a mostly-open standard. Many models of PS/2 were made, which came in the form of desktops, towers, portables, laptops and notebooks.

An assortment of IBM PS/2s in various form factors; from left to right: a Server 95, a Model 80, a Model 25, and a PS/2 E on top of a Model 56 and a Model 30 286

Notes

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Legend
  ISA, 8-bit
  ISA, 16-bit
  Micro Channel, 16-bit
  Micro Channel, 32-bit
  MCA/ISA
  Other
Explanatory notes
  • Built-in or optional monitors are CRTs unless mentioned otherwise.
  • The Space Saving Keyboard is a 87-key numpad-less version of the Model M.[1]
  • The 25 Collegiate, intended for college students, had two 720 KB floppy drives, maxed out the RAM to 640 KB, and came packaged with the official PS/2 Mouse, Windows 2.0, and four blank floppy disks.[1][2]
  • Financial workstations came packaged with a 50-key function keypad and were intended for use in banks.[1][3]
  • LS models are "LAN Stations": essentially the same as their non-LS counterparts but without floppy drives or hard drives and that connect to networks using Ethernet or Token Ring adapters (in essence, diskless workstations).[4]
  • Ultimedia models shipped with a microphone and included SCSI CD-ROMs, M-Audio sound adapter cards and volume controls and headphone and microphone jacks at the front of the case.[5]
  • Array models are PS/2 Servers with support for RAID.[6]

Models

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Main line

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PS/2 Server

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Portables

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See also

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References

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