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The IBM PS/2 Model 80 was announced in April 1987. The IBM PS/2 was the third generation of IBM PCs.
Unlike previous IBM PCs the model 80 used a new bus called Micro Channel Architecture. The model 80 has an Intel 386 processor, with 1MB or 2MB of RAM and a VGA display adapter.
The machine could run IBM PC DOS 3.3, OS/2, Microsoft PC Xenix and IBM AIX PC.
This computer has two 3.5-inch 2,88MB diskette drive and a 115MB Enhanced Small Disk Interface hard disk.
This portable machine was again classed as a "luggable" as it is portable but weighs more than 20 pounds.
The IBM PS/2 P70-386, released in 1989, has an Intel 386DX processor and supports up to 8MB of RAM.
The PC had a built-in plasma display and its VGA adapter could also power several different external PS/2 monitors.
The machine could run IBM PC DOS 3.3, OS/2, Microsoft Xenix or AIX PC.
Announced in October 1990, the IBM PS/2 Model 95 could be powered by a number of processors, from a 20MHz Intel 486 to a 90MHz Intel Pentium.
The model 95 has a fully interchangeable processor complex motherboard: containing the processor, memory controller and micro channel interface. It has a 32-bit Micro Channel Architecture bus.
The machine supports from 8MB to 64MB of DRAM, in eight 72-pin sockets.
The SCSI adapter can support both internal and external devices, such as hard disks, tape drives and CD drives.