This section has two detailed pictures of the guts of a PCjr.
Source: M. Brutman, 2005
This PCjr has all of the installable options, except for an internal modem. The empty slot is visible toward the center of the picture. Unlike modern PCs, there is no corner or boxed-in area set aside for the power supply. It is on the leftmost card, and it plugs directly into the motherboard. A black cable feeds the optional diskette drive, and the red and blue wires (sorry about the image quality) feed the fan that is integral do the diskette drive.
This PCjr has three expansion sidecars on it - a memory
sidecar, and the speech adapter.
This particular machine is a later version; it has an
to the motherboard, instead of an Intel 8088 sitting in a
(AMD made the D8088 under license from Intel.) Most of the
are fairly discrete - motherboards of this era did not have a lot of
"super chips" on them.
| Created in
December 2000, Last updated June 30th,
(C)opyright Michael B. Brutman, mbbrutman at gmail.com
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