KEYPAD USAGE


Use the overlay for the on-board SCRIBBLING program. You can purchase stick on
multi-use labels at a grocery or drug store. Cut the labels to size and stick
them on the overlay. Label the overlay as indicated below.

    1    2    3    4

    5    6    7    8

    9    A    B    C

    D    E    F    0

    Q/S HD2  HD1  SX

    CE  HD4  TUR  S3
    HD3



KEYPAD USAGE LISTING

The following list indicates what optional programs will be executed when the
indicated key below is pressed AFTER the system reset button is pressed. Note
the execution of these programs will only occur if the Bally/Astrocade 
motherboard is operating properly.


Low Resolution

Press key     Executes this program
after reset

    1         Memory Read Loop

    2         Memory Write Loop    

    3         Input Port Read Loop

    4         Output Port Write Loop

    5         Memory Write and Read Loop

    6         Monitor Device Input Ports


    7         Crash Test (10 Fish) Demo

    9         MCM Design Title Page

    A         New Checkmate Demo

    B         Test Dual Display, Display Test Patterns

    D         Test User RAM 6000-7FFF

    E         Test User RAM 8000-FFFF

    TUR       Test User RAM with User Set Up


    Q/S       Execute Nonstop Standard Balcheck Tests Mode



High-Resolution
Requires "modified for hi-res" Bally/Astrocade

Press key     Executes this program
after reset

    F         Test Hi-Res Screen RAM

    HD1       Hi-Res Demo 1 Move Critter, Fish and Wagon

    HD2       Hi-Res Demo 2 Textured 10 Color Test Pattern

    HD3       Hi-Res Demo 3 The Pixel Stringer

    HD4       Hi-Res Demo 4 Low-Res ROM on Hi-Res Screen Map



Note: Keys 0 thru F hexadecimal and CE (Clear Entry) double as keypad inputs
for 5 Balcheck optional test routines and Test User RAM (TUR) routine.


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


The following list indicates what key must be held down during the system reset
to execute the listed program/routine.


Hold down key     Executes this program/routine
during reset

    8             Standard Balcheck Tests with
                  Four 2K ROM Checksum Test

    C             Read Loop for Troubleshooting

    0             Write Loop for Troubleshooting

    SX            SetScreenHR (hi-res)

    S3            SetScreen3 (low-res)






End of document
MCM Design
Dec 2018
