IBM PS/2 E
{{Short description|1993 IBM desktop computer}}
{{Infobox computing device
| name = PS/2 E
| image = File:IBM PS2E.png
| caption = The IBM PS/2 E on top of a Model 56 and Model 30 286.
| developer = International Business Machines Corporation (IBM)
| manufacturer = IBM
| family = Personal System/2
| type = Personal computer
| releasedate = {{Start date and age|1993|07|29}}
| price =
| connectivity =
| lifespan =
| unitssold = Around 25,000
| media = 1.44{{nbsp}}MB 3½-inch floppy disks
| os = IBM DOS 5.02 or 6.1, Windows 3.1, Windows 95, OS/2
| input = Track Point II Keyboard, mouse (optional), touch screen
| camera =
| power = 24{{nbsp}}PSU
| cpu = 50{{nbsp}}MHz IBM 486SLC2
| storage = 120{{ndash}}340{{nbsp}}MB hard drive
| memory = 4{{ndash}}16{{nbsp}}MB
| display =
| audio =
| service =
| dimensions = 304.8{{nbsp}}×{{nbsp}}304.8{{nbsp}}×{{nbsp}}69.6{{nbsp}}mm
| weight = 4.3{{ndash}}4.66{{nbsp}}kg
| touchpad =
| predecessor =
| successor =
| related = List of IBM PS/2 models
}}
The PS/2 E or Energy (IBM 9533) is a member of the IBM Personal System/2 family of personal computers (PCs). It was the first Energy Star-compliant PC,{{Attribution needed|date=October 2021}} consuming very little power relative to other contemporary PCs, and made extensive use of recycled materials in its enclosure.
Specifications
The PS/2 E featured an IBM 486SLC2 microprocessor with a 16{{nbsp}}KB L1 cache that ran at 50{{nbsp}}MHz on a 25{{nbsp}}MHz system bus (the processor clock was double that of the system bus).{{cite web |last1=Ohland |first1=Louis |title=386 Upgrades |url=https://www.ardent-tool.com/CPU/386_upgrade.html#IBM_SLC_DLC_BL |accessdate=10 December 2024}} The processor's performance was dependent on the L1 cache containing the required instructions and data; there was no external L2 cache on the motherboard like on some other 486-based computers.
It featured an ISA bus for input/output, which accepted a single ISA option adapter with the use of a riser card. Depending on the sub-model number, it came supplied with either a special option adapter for four PC card PCMCIA slots, or a network interface card for Ethernet or Token Ring networks for use as a diskless workstation.{{cite web |title=Personal Systems Reference IBM PS/2 1992 to 1995 - withdrawn |url=http://www.lenovo.com/psref/pdf/ps2book.pdf |archive-url=https://web.archive.org/web/20170624060741/http://www.lenovo.com/psref/pdf/ps2book.pdf |archive-date=June 24, 2017 |publisher=IBM PC Institute |accessdate=20 June 2014}} Additional options included several PCMCIA cards, a color LCD screen, and a color LCD touch-screen with a special version of OS/2.
The PC borrowed some components from IBM's ThinkPad laptops: including the 1.44{{nbsp}}MB floppy disk drive and the hard disk drive. Its enclosure was composed of recycled plastics, and was designed to be easily recycled at the end of its service life. The power supply unit maximum power consumption was 24{{nbsp}}watts, and was completely passively cooled, and lacked a fan for that reason.{{cite web |last1=Ohland |first1=Louis |title=PS/2 E |url=https://www.ardent-tool.com/9533/ |accessdate=10 December 2024}}
Design
The PS/2 E featured a full-sized internal PC speaker, two SIMM sockets, and an extended bank of memory soldered directly to the motherboard. It featured 1{{nbsp}}MB of video memory for the onboard XGA-2 graphics adapter, which was attached to the ISA bus instead of the usual MCA bus. Like all Personal System/2 computers, if a change in hardware is performed, the configuration must be updated with the use of the reference diskette (for example changing the memory size).
Inside IBM PS2E.jpg|The PS/2 E motherboard
PS2E FDD PSU.jpg|The power supply and floppy drive on the internal rail
PS2E Memory.jpg|A closeup of the internal memory bank and two SIMMs
References
{{Reflist}}
External links
- [http://www.mcamafia.de/mycomp/images/pizzabox.jpg Image of a PS/2 E with its LCD screen]
- [https://web.archive.org/web/20071019110156/www.nothingtodo.org/classiccmp/ps2e.jpg Image of a PS/2 E on its box]
- [http://www.walshcomptech.com/ps2/mod33.htm A page with some pictures of the PS/2 inside]
- [https://ardent-tool.com/9533/193-226.txt IBM Announcement Letter Number 193-226 dated July 29, 1993]
- [https://web.archive.org/web/20170624060741/http://www.lenovo.com/psref/pdf/ps2book.pdf IBM PC Institute - Personal Systems Reference - IBM PS/2 1992 to 1995 - withdrawn.]
{{IBM personal computers}}