Patent ID: 7859688

Claim:
A command data conversion device for use in a printing system, comprising: a command interpreter that receives print command data including commands to be used in print control and associated data, and interprets contents of the print command data; and a processor that receives at least either of the commands and the associated data and executes prescribed processing, wherein the command interpreter has command registers that can store multiple print commands, wherein the command registers are rewritable memories and one of the multiple print commands stored in the command registers can be replaced with a new command when a code of the one command has changed, wherein the one command is commonly used for multiple types of printing systems; every time power to the command data conversion device is switched from off to on, the multiple print commands are automatically written into the command registers based on information stored in a read-only memory; every time power to the command data conversion device is switched from off to on, initial values for printing are set based on information other than the commands currently stored in the command registers and are written into the command registers; and the command data conversion device is an application-specific integrated circuit (ASIC).