Fitzpatrick Cella Harper & Scinto
Information processing apparatus which discriminates whether or not input information is stored in memory and controlling the switching from a first control program to a second control program
 There is disclosed an information processing apparatus, such as a printer, capable of selectively using plural control programs by utilizing an external memory, such as a program cartridge, containing additional programs. When a switching of control program is requested for example by a switch, the start address of the requested program is indirectly obtained by referring to a fixed address of the memory cartridge containing the requested program. 
Canon Kabushiki Kaisha
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Yutaka Yoshiaki Kunio Haruo
Murakami Kawamura Okada Fujita