| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine characterized in processing by control means.SOLUTION: ROM stores a first jump command, a second jump command, and a third jump command. A jump destination address of the second jump command is an octuple of a value exceeding a maximum value being represented by 3 bits, by just one. Upper two bits of the second jump command are same values as upper two bits of first command data. The CPU is configured to, when receiving the third jump command, execute arithmetic of subtracting 0 from a value of a first register, when a result of the arithmetic is 0, set two zero flags, and execute a movement of jumping to a third jump destination address, when the result of the arithmetic is not 0, clear the two zero flags, and execute a subsequent command of the third jump command. The first register is any one register of an accumulator and a general-purpose register.SELECTED DRAWING: Figure 114 |
