BalCheckHR - Scans - Table of Contents
December 2018
MCM Design



    BalCheckHR - Scans - Table of Contents  -  1

1 - SetScreen3 Initial Display              -  2 

2 - BalCheckHR Board                        -  3-5

    2.1 - EEPROM Interface                  -  3
    2.2 - Dual Display                      -  4
    2.3 - Power Line                        -  5

3 - Bally/Astrocade Motherboard             -  6-12

    3.1 - ROM Decoding                      -  6
    3.2 - RAM Timing                        -  7
    3.3 - Microcycler                       -  8
    3.4 - Custom Address/Data               -  9
    3.5 - RAM Decouplers                    - 10
    3.6 - Detailed Motherboard Layout       - 11
    3.7 - Notes                             - 12

4 - Balcheck RAM Test Flow Chart            - 13-14

5 - BalcheckHR in a Cartridge               - 15

6 - Factory Tests                           - 16-22

7 - Hi-Res Demo Magic Writes                - 23

