4033 LX  (250-5130)                 Layout               Faxback Doc. #1657

MAIN LOGIC BOARD
                                  ┌─┐  ┌─────┐
┌────────────────────────╒══╦══╕─╒╧═╧╕╒╧═════╧╕┐
│                        │  ║  │ └───┘└───────┘│
│  ▓  ▓  ▓  ▓  ▓  ▓      └──╨──┘               │
│  ▓  ▓  ▓  ▓  ▓  ▓ «---------▓----------------│--« 16 Bit Standard
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓ |              │    expansion slots
│  ▓  ▓«-▓--▓--▓--▓-----------▓----------------│--« 16 Bit VGA Video
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓                │    Graphics Expansion
│                             ▓                │    Adapter (installed)
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓                │
│  ▓  ▓  ▓  ▓  ▓  ▓                      ┌─────┘
│  ▓  ▓  ▓  ▓  ▓  ▓  ▓«------------╥--╥-┌┘--------« CPU slot
│   ||               ▓             ║«-║┌┘---------« Smart Drive Connect
│                    ▓             ╨  ╨┤
│  ▓«-▓-----┌──────┐-▓-┌──────┐---┌───┐│----------« 32-Bit Memory
│  ▓  ▓     │      │ ▓ │      │   │   ││            Expansion slot 1
│           │      │ ▓ │      │   └───┘│
│  ▓  ▓«----│------│-▓-│------│-------┌┤----------« 32-Bit Memory
│  ▓  ▓     └──────┘ ▓ └──────┘       ╞╡            Expansion slot 2
│                          || |       └┤            Adapter 1 installed
└──────────────────────────────────────┘

                  Serial port----»┌─┐  ┌─────┐«--Parallel Port
┌────────────────────────╒══╦══╕─╒╧═╧╕╒╧═════╧╕┐
│       PS/2 Keyboard---»│  ║  │ └───┘└───────┘│
│  ▓  ▓  ▓  ▓  ▓  ▓      └──╨──┘«--- PS/2 Mouse│
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓      connector │
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓ |«-------------│-- Primary monitor
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓                │   Type Jumper
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓                │   E10, E11, E12
│                             ▓                │
│  ▓  ▓  ▓  ▓  ▓  ▓           ▓                │
│  ▓  ▓  ▓  ▓  ▓  ▓                      ┌─────┘
│  ▓  ▓  ▓  ▓  ▓  ▓  ▓             ╥  ╥ ┌┘
│   ||«--E24, E25    ▓             ║  ║┌┘
│                    ▓ E1 thru E4--»| ╨┤«--------- Diskette drive
│  ▓  ▓     ┌──────┐ ▓ ┌──────┐   ┌───┐│           connector
│  ▓  ▓     │      │ ▓ │      │   │   ││
│           │      │ ▓ │      │   └───┘│«--------- Main Logic Board
│  ▓  ▓     │      │ ▓ │      │       ┌┤           Power connector
│  ▓  ▓     └──────┘ ▓ └──────┘       ╞╡«--------- Battery connector
│         E13 thru E21----»|| |       └┤«--------- Speaker connector
└──────────────────────────────────────┘

VGA 16-bit BOARD
┌─────────────────────────┐           ┌────────┐
│                         │┌─────────┐│        │
│ ▓▓▓▓▓▓  ▓▓▓▓▓▓          ││░░░░░░░░░││ <----------Video feature
│                         └┘         └┘        │       connector
│ ▓▓▓▓▓▓  ▓▓▓▓▓▓    ┌───────────┐              │
│                   │           │           ┌──┤
│ ▓▓▓▓▓▓  ▓▓▓▓▓▓    │           │           │  │ <-video connector
│                   │           │           └──┤
│ ▓▓▓▓▓▓  ▓▓▓▓▓▓    │           │            ┌─┤
│                   │           │            │ │ <-DIP switch
│ ▓▓▓▓▓▓  ▓▓▓▓▓ ▀1  └───────────┘            └─┤
│ ▓▓▓▓▓▓  ▓▓▓▓▓ ▀2<--------------------------------W2 Feature Connector
│         ▓▓▓▓▓ °3                             │       Clock Jumper
│ ▓▓▓▓▓                                        │
│ ▓▓▓▓▓ ▀ <----------------------------------------W1 BIOS jumper
│ ▓▓▓▓▓ ▀                                      │
└─────────┐          ┌──┐                 ┌────┘
          │░░░░░░░░░░│  │░░░░░░░░░░░░░░░░░│ <------System expansion
          └──────────┘  └─────────────────┘            slot connectors

 *  VIDEO CONNECTOR.  Connect your VGA-compatible monitor to this
             15-pin socket.  The VGA adapter supports monochrome VGA and
             RGB VGA analog monitors.

 *  DIP SWITCH.  The switches on this four-section DIP switch define
             the video configuration of your computer.

 *  VIDEO FEATURE CONNECTOR.  This connector is provided to maintain
             complete compatibility with the IBM VGA standard.  Normally,
             there will be no need to use this connector.  It is reserved
             to support future enhancements.

 *  FEATURE CONNECTOR CLOCK JUMPER (W2).  This jumper activates and
               deactivates Video Feature Connector.  The default jumper
               setting (pins 1 and 2 connected) enables 132-column text
               modes and disables the video feature connector.  Changing
               the jumper setting so that pins 2 and 3 are connected
               disables the 132-column text modes and enables the Video
               Feature Connector.  NOTE:  Leave the this jumper in the
               default setting for normal system use.

 *  SYSTEM EXPANSION SLOT CONNECTORS.  These connectors plug into the
               expansion slots inside your computer.

The Math Coprocessor socket is located on the CPU board, as illustrated
in the following diagram.

CPU BOARD
┌──────────────────────────────────────────────────────────────┐
│    ┌──────┐ ┌──────┐ ┌────\                                  ├┬──
│    │      │ │      │ │     │°«---Pin Socket 1                ││
│    │      │ │      │ │     │                                 ││
│    └──────┘ └──────┘ └─────┘«---Math Coprocessor Socket      ││
│                                                              ││
│                                        ▓▓▓▓▓▓▓  ▓▓▓▓▓▓       ││
│                                                              ││
│                                        ▓▓▓▓▓▓▓  ▓▓▓▓▓▓       ││
│                                                              ││
│                                        ▓▓▓▓▓▓▓  ▓▓▓▓▓▓       ││
│                                                              ││
└──────┐        ┌┐             ┌───────────────────────────────┘│
       │░░░░░░░░││░░░░░░░░░░░░░│                                │
       └────────┘└─────────────┘                                │

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