Original PC Hardware Reference
Original PC Hardware Reference
Original PC Hardware Reference
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An Introduction to the Portable <strong>PC</strong> CD: 29<br />
IBM withdrew the Portable <strong>PC</strong> from the market on April 2, 1986, a date that coincides with the<br />
introduction of the IBM Convertible laptop <strong>PC</strong>. The Portable <strong>PC</strong> is rare because not many were<br />
sold, although it compared to, and in many ways was better than, the highly successful Compaq<br />
Portable that was available at the time. The Portable <strong>PC</strong> was largely misunderstood by the trade<br />
press and user community; most did not understand that the system was really a portable XT and<br />
had more to offer than the standard IBM <strong>PC</strong>. Maybe if IBM had called the system the Portable<br />
XT, it would have sold better!<br />
Disk drives<br />
Figure 8 The IBM Portable <strong>PC</strong> interior.<br />
9" Amber CRT<br />
Power supply<br />
Color graphics adaptor<br />
The Portable <strong>PC</strong> system unit has these major functional components:<br />
■ Intel 8088 4.77MHz microprocessor<br />
■ ROM-based diagnostics (POST)<br />
■ BASIC language interpreter in ROM<br />
■ 256KB of Dynamic RAM<br />
Power switch<br />
■ Eight expansion slots (two long slots, one 3/4-length slot, and five short slots)<br />
■ Socket for 8087 math coprocessor<br />
■ Color/Graphics monitor adapter<br />
■ 9-inch amber composite video monitor<br />
■ Floppy disk interface<br />
■ One or two half-height 360KB floppy drives<br />
■ 114-watt universal power supply (115–230v, 50–60Hz)<br />
■ Lightweight 83-key keyboard<br />
■ Enclosure with carrying handle<br />
■ Carrying bag for the system unit
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