• Z103 - Used to receive data from POKEY chip, translate the
information, send data to keyboard (Outputs from POKEY).
• Z104 - Receive data from keyboard, translate data, send data to
POKEY chip (Inputs to POKEY).
• Z102 - Used to develop READ/WRITE early and late signals. Used to
decode MEMORY MAP for computer.
• A103, A104 - Buffer for video and lum lines - Part of POWER-RESET
circuit.
• Z101 - Develop MEMORY MAP for computer.Z105, Z106 - Bi-directional
buffers for data lines.
5.5 DISASSEMBLY, 400 COMPUTER CONSOLE
This paragraph describes the procedures required to disassemble the
400 Computer Console. Proceed after reading the following notes.
1. Be very careful about mixing screws. The Plastic and aluminum
parts will easily strip if the wrong size screw is used.
2. Excessive torque on screws will strip the plastic and aluminum
parts:
• Plastic - 6 inch pounds torque maximum.
• Aluminum - 10 inch pounds torque maximum.
3. Protect the plastic surfaces of the console by working on a soft
surface when the console is turned over, bottom up.
4. Use all static control precautions when handling any printed
circuit board.
Access to Keyboard and Power Supply:
1. Top cover removal, refer to Figures 5-17 and 5-18
• Set unit on its back
• Remove 4 screws (no. 6 20x1/2) from bottom cover
• Set unit upright
• Unhook Top Cover from Keyboard
• Open Cartridge Door o Lift Top Cover off
ATARI Personal Computers 5-30
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