CPU controlled apparatus formed on an IC

Year	Description
1994	Invention patented by Toshimasa Tanaka on April 24th, 1994. Abstract: In a game software apparatus, a ROM incorporating a program, a decoder for supplying a selection signal of the ROM, a backup RAM for holding a function from a CPU incorporated in a game machine and a decoder for controlling the RAM are activated by a power supplied from the game machine. When the power from the game machine is cut off, the power source is changed by a changeover circuit so that power is supplied from a battery incorporated in the game software apparatus to the RAM and to the decoder while the power from the game machine is being cut. The two decoders and the changeover circuit are provided on a one-chip IC.
Source: selected by the editor from original sources.

Invention: CPU controlled apparatus formed on an IC