IBM PS2 Model 50

Anunciado em 2 de abril de 1987 

Com bus MicroChannel, uma tentativa sem sucesso da IBM recuperar a liderança nalguns dos standards dos PCs (neste caso sobre as ligações de periféricos). O resto da indústria respondeu com o bus EISA.

O topo da linha baseava-se no microprocessador 80386.

The Personal System/2 Model 50 (IBM 8550) introduces advanced design and technology and a new MICRO CHANNEL (TM) ARCHITECTURE to provide significant price/performance enhancements for desktop computing and workstations. The 10MHz INTEL 80286 microprocessor offers application growth capabilities and is designed to maintain software compatibility with most current IBM personal computer programs. A high level of feature integration on the system board reduces optional adapter requirements. When configured with the new analog displays, the IBM 8550's new integrated Video Graphics Array (VGA) provides enhanced performance, increased display functions, and increased color availability. The system includes a 1.44MB, 3.5-inch diskette drive and a 20MB fixed disk drive. Besides the new mouse, memory, math co-processor, and diskette drive options, new connectivity options (dual asynchronous, multi-protocol, and modem adapters, and other options) allow the IBM 8550 to communicate with a variety of hosts and networks."

System Characteristics

Microprocessor: Intel 80286 (16 bit)

Clock speed: 10 Mhz, one wait state

Coprocessor: socket for optional i80287 math coprocessor

Type of BUS: 16-bit MCA (Micro Channel)

Total number of expansion slots: 4

Ports: PS/2 keyboard, PS/2 mouse, serial, parallel, VGA

Memory

Min/Max on system board: 1MB (expandable to 7MB with memory options)

Type of memory:

RAM: DRAM (2 x PS/2 30-pin 512kb module) approx. 150ns w. parity.

ROM: 128kb

Cache: n/a

Physical description

Power supply: 94w, 110-220VAC auto sense

Weight: 9.55 kg (21 lbs)

Dimensions (HxWxD): (140 x 360 x 420mm)

Mass storage

Drive bays: 3 3.5" half-height

Floppy Disk

Size: 3.5 inch half-height

Capacity: 1.44MB

Hard disk

Size: 3.5 inch half-height

Capacity: 20MB

Access time: 80ms

Interface: ST-506 PS/2 model 50 connector

Display

Size:

Display type: Optional Analog CRT

Graphics modes supported: Integrated VGA Display adapter

320x200, 256 colours

640x480, 16 colours

Keyboard

Type: 101 key enhanced

Software

Operating system: IBM PC DOS Versions 3.30 or higher

Configurations

Various memory, diskette drive, hard drive, monitor, and keyboard configurations including;

8550-021 - System unit, 1MB RAM, 20MB hardfile, 1.44MB, 101 keyboard

Local - Laboratório Pedagógico 2

Código de Inventário: MV-0011

Exemplar da coleção do Museu Virtual de Informática.

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