 The IBM PS/2 E on top of a Model 56 andModel 30 286. | |
| Developer | International Business Machines Corporation (IBM) |
|---|---|
| Manufacturer | IBM |
| Product family | Personal System/2 |
| Type | Personal computer |
| Release date | July 29, 1993; 32 years ago (1993-07-29) |
| Units sold | Around 25,000 |
| Media | 1.44 MB 3½-inchfloppy disks |
| Operating system | IBM DOS 5.02 or 6.1,Windows 3.1,Windows 95,OS/2 |
| CPU | 50 MHzIBM 486SLC2 |
| Memory | 4–16 MB |
| Storage | 120–340 MBhard drive |
| Input | Track Point II Keyboard,mouse (optional),touch screen |
| Power | 24 PSU |
| Dimensions | 304.8 × 304.8 × 69.6 mm |
| Weight | 4.3–4.66 kg |
| Related | List of IBM PS/2 models |
ThePS/2 E orEnergy (IBM 9533) is a member of theIBMPersonal System/2 family ofpersonal computers (PCs). It was the firstEnergy Star-compliant PC,[attribution needed]consuming very little power relative to other contemporary PCs, and made extensive use of recycled materials in itsenclosure.
The PS/2 E featured anIBM 486SLC2 microprocessor with a 16 KBL1 cache that ran at 50 MHz on a 25 MHzsystem bus (the processor clock wasdouble that of the system bus).[1] 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 anISA bus forinput/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 fourPC card PCMCIA slots, or anetwork interface card forEthernet orToken Ring networks for use as a diskless workstation.[2] Additional options included several PCMCIA cards, a color LCD screen, and a color LCD touch-screen with a special version ofOS/2.
The PC borrowed some components from IBM'sThinkPadlaptops: including the 1.44 MBfloppy disk drive and thehard disk drive. Its enclosure was composed of recycled plastics, and was designed to be easily recycled at the end of its service life. Thepower supply unit maximumpower consumption was 24 watts, and was completely passively cooled, and lacked a fan for that reason.[3]
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 MB of video memory for the onboardXGA-2 graphics adapter, which was attached to the ISA bus instead of the usualMCA 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).
