IBM PS1

Historia

The IBM PS/1 is a brand for a line of personal computers and was IBMs return to the home market in 1990, five years after the IBM PCjr. It was replaced by the IBM Aptiva in September 1994. Like the PCjr, the PS/1s name suggested a more limited machine than IBMs business line, the PS/2. However, unlike the PS/2, the PS/1 was based upon architecture closer to the AT and compatibles, such as using ISA, plain VGA, and IDE. The PS/1 line was created for new computer users and was sold in consumer electronics stores alongside comparable offerings from Compaq, Hewlett-Packard, Packard Bell, and others. American PS/1 models came with a modem installed so users could access online IBM help services, which were provided by partnerships with Prodigy and Quantum. Although the first models used custom designed components and design, later desktop and tower models used mostly standard components. The earlier models included a ROM with IBMs PC DOS and a graphical shell, however the system was compatible with other DOS implementations and the shell could be installed on the hard-drive. Later models included a feature called Rapid Resume which gave the computers the ability to go into standby mode as well as a hibernation function. There were several form factors used during the PS/1s production: 2011 Proprietary design, power supply is within CRT 2121 Proprietary design, power supply is within CRT, up to two available ISA slots 2123 Limited production model. Based on IBM PS/2 model 30 case, three available ISA slots 2133 Desktop case. The 3x3 references the available slots and drive bays. 2155 Desktop case larger than 2133. The 5x5 references the available slots and drive bays. Including a 5.25 bay. 2168 Tower unit. The 6x8 references the available slots and bays. Including 5.25 bays. The 2133 and 2155 cases were used in several model years with the 2168 tower unit appearing a bit later.

Características

*IBM PS/1 (model 2011)
Type	Personal computer
Release date	1990
Operating system	PC DOS 4.01 (in ROM)
CPU	Intel 80286 @ 10 MHz
Memory	512 KB ~ 1 MB

*IBM PS/1 (model 2121)
Type	Personal computer
Release date	1992
Discontinued	1993
Operating system	PC DOS 4.01 (in ROM)
CPU	Intel 80386SX @ 16 MHz ~ 20 MHz
Memory	2 MB ~ 6 MB

*IBM PS/1 (model 2133)
Type	Personal computer
Release date	1992
Discontinued	1993
Operating system	PC DOS 4.01
CPU	Intel 80386SX @ 25 MHz or 80486SX @ 20 MHz or 80486SX @ 25 MHz or 80486DX @ 33 MHz
Memory	2 MB ~ 16 MB (2-4MB on-board)

*IBM PS/1 (model 2155)
Type	Personal computer
Release date	1993
Discontinued	1994
Operating system	PC DOS 6.00 / Windows 3.1
CPU	Intel 80486SX @ 25 MHz or Intel 80486SX @ 33 MHz
Memory	2 MB ~ 6 MB