When a Betting Stopped message is received at block 180, the display board plays a video segment where the roulette wheel tilts from horizontal to vertical on the monitor screen for increased player visibility (block 182). At the same time the ball roll sound is initiated (block 183) and No More Bets is displayed on the tower monitor (block 184) simultaneously with the appearance of the current dealer in a video window announcing "No more bets" (block 186). The display board waits for the winning number from the game board in block 188 and, once received, immediately saves it and returns it to the game board in block 190.
Each player station utilizes electronic logic (firmware) to enable a player via a track ball to move a video hand across the playing field and place specific bets. Betting and other information is transmitted over an interface to permit the dealer station to actually display the bets on the betting field.
FIG. 8 illustrates a preferred program flow of a game board routine 100 (hereinafter the game board or GB) for game board chassis 31, as well as the interaction between game board chassis 31 and tower PC 80 in coordinating audio/video output in the machine. FIGS. 9A, 9B and 9C illustrate a preferred program flow of a display board routine 150 (hereinafter the display board or DB) for tower PC 80. In FIG. 8, all lines with arrows to the right are game board messages to the display board, while all lines with arrows pointing to the left are messages to the game board from the display board. The reverse is true for FIGS. 9A-9C. During these program sequences the game board also communicates with and processes inputs from each player station but an explanation of these functions is not necessary for an understanding of the invention.
One technique involves the superimposition of a computer generated graphical representation of a game ball over a pre-recorded video graphic image of a roulette wheel spinning at a constant rate. With this technique, the processing is basically limited to the generation and movement of a graphic image of the ball, as it has been found that the movement (in particular, the spin rate) of a physical roulette wheel does not substantially change during the ball spin and drop phase, and thus can be accurately simulated with a pre-recorded image. With the reduction in processing, development of the machine is substantially simplified, and less powerful (and thus less expensive) hardware may be used to implement the machine.