4020SX  (250-4902/3)           Math Co-processor        Faxback Doc. # 1607

The math coprocessor socket is located on the CPU board, as illustrated
in the following diagram.

┌───────────────────────────────────────────────────────────────────┐
│     ∞∞ ∞∞ ∞∞ ┌────────────────────┐ ╔══════════╗╔════════════╗ ┌─┐│
│              ╞════════════════════╡ ╚══════════╝╚════════════╝ └─┘│
│              ╞════════════════════╡    █  █  █  █    ████ Θ    ┌─┐│
│              ╞════════════════════╡                  ████ °    └─┘│
│ ┌──┐┌──┐Θ.   └────────────────────┘    █  ▀  ▀ ███   ████ .   ┌───┤
│ │  ││  │°Θ     █  █  ▄  █  █  ▄                ███   ████ Θ   │   ├┐
│ │  ││  │                               █  █  █                │   ├┘
│ └──┘└──┘       █  █  ▀  █  █  ▀                 █   ████      └───┤
│  █   █                        █        █  █  █  █         .   ┌───┤
│                               █                      ████ Θ   │   ├┐
│               █   ████     ████        █  █ ▀ █      ████ Θ   │   ││
│  ████             ████     ████                   ∞∙    ∞∙° . │   ├┘
│  ████                                     █  █   ████   ██  Θ └───┤
│               █             ███           ░░   █   ═══ ═══    ┌───┤
│                     ████                  ░░ ┌─╖   ═══ ═══    │   ├┐
│  ██████     █ . █   ████      ███         ░░ │:║  æææææææææ   │   ├┘
│  ██████                                   ░░ │:║ ▀ ▀ ▀ ▀ ▀    └───┤
│  █████▀ «--- Math Coprocessor socket pin 1░░ └─╜ ▀ ▀ ▀ ▀ ▀        │
└───────────────────────────────────────────────────────────────────┘

WARNING!  Carefully read the instruction in this section before
installing the coprocessor.  Incorrect  orientation or installation of
the coprocessor can damage the coprocessor or the socket, and removal of
the coprocessor requires a special extraction tool.

Additional instructions might be included with the coprocessor.  If you
choose not to install the coprocessor yourself, a trained technician at
a Radio Shack Service Center can install it for you.

CAUTION:  Before handling electrical components touch a grounded metal
object to release any static electrical charge from your body.

To install a coprocessor:

1.  Orient a coprocessor so that the dot on the corner of the coprocessor
    aligns with the notched corner.  A small white arrow points to the Pin
    1 corner of the socket.  (See the preceding illustration.)

2.  Do not bend or touch the metal pins.  Press the coprocessor into the
    socket.

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