June 2, 1988: IBM PS/2 Model 70
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1988 – While not the first version of the PS/2, the Model 70 was introduced with the 80386 processor. 16, 20, and 25 MHz clock speeds. The Model 70 also used a 25 MHz Intel 486 processor in a complex called the Power Platform.
If you wanted to upgrade to the 80486, you would have to replace the PS/2’s BIOS chip along with the processor board.
The model 70-A21 sold for $11,295 and included 2 MB of RAM, 120 MB ESDI hard drive, MS-DOS and OS/2. If you wanted a monitor for it, you would have to put down an additional $595 for the 8512 VGA.
Model 70 was a desktop case and Model 80 was a tower. IBM also introduced the PS/2 Model 25 LS and PS/2 Model 50 Z.
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