JPH02201629A - Mode switching system for dual mode printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides a mode switching method used in a dual-mode printer that has two or more different ESC sequence systems and can switch between the ESC sequence systems. Regarding the method.

(Prior Art) Conventionally, printer escape (ESC) sequences differ from manufacturer to manufacturer, and usually only one type of ESC sequence system is provided for one type of printer. Recently, dual mode printers have appeared that have two different ESC sequence systems. However, to switch the ESC sequence system, it is necessary to turn on the power again after setting with a DIP switch or a memory switch.

(Problem to be solved by the invention) When a dual-mode printer is connected in a multitasking environment and multiple tasks supporting different ESCSC systems are running and printing, conventionally, after setting the ESC sequence system switching on the printer itself, There were problems such as not being able to print multiple tasks at the same time because the power had to be turned off and on again.

This invention was made in view of the above-mentioned circumstances, and when multiple tasks that support different ESC sequence systems operate and print simultaneously, the ESC sequence system of the printer itself or a dual system that can be switched without having to turn the power off and on again is used. The purpose of this invention is to provide a mode switching method for mode printers.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a dual-mode printer that operates in two or more modes with different connection interfaces, which detects when a code for switching an escape sequence has arrived from the main body. means for recognizing and storing this and processing subsequent escape sequences and subsequent codes in the stored mode; and receiving/receiving commands for switching;
4. The printer control device is equipped with a means for storing this code and processing it in the stored code system until receiving a command for switching from then on, and the printer control device uses the code system for switching the escape sequence that comes from the main unit. This system is characterized by the ability to change code systems online by recognizing the following commands.

As a result, printing by a task that supports a different ESC sequence system can be performed without having to turn on the power to switch the ESC sequence system on the printer main body side, thereby reducing the burden on the operator.

(Example) Hereinafter, an example of the present invention will be described in detail using drawing F1.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, ] - is a host computer, which is connected to the printer control device 2 via the system bus 3 . The printer control device 2 is composed of a node interface circuit 21, a microprocessor 22, a RAM 23, a ROM 24, and a printer adapter 25. The print data is stored in the RAM 23, and the procedure shown in the flowchart of FIG. 2 is stored in the ROM 24 in the form of a program. The microprocessor 22 reads and executes this content. 4 is a dual mode printer.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention. In the figure, step (2) is a step for checking the ESC sequence system switching code, and if the switching code is found, the process branches to step (2), otherwise the process branches to step (2). Step (2) is a step for storing ESC sequence system switching. Step (2) is a step for checking the ESC detection system, and the current system stored in step (2) is checked, and the process branches to step (2). Step (2) is a step for processing the ESC sequence A, and the ESCSC goose is processed according to the system A. Step (2) is a step for processing the ESC sequence system, and processes the ESCSC goose according to system B.

Hereinafter, the operation of the embodiment of the present invention will be explained in detail. The printer main body program (host computer 1)
When a switching code to SC sequence A is issued and the printer control device 2 receives it, it stores the current ESC sequence system as A, and the ESC sequence to be received next and the code following it are processed by the processing routine of ESC sequence A. will be processed. Next, when the ESC sequence system switching code is received, the current ESC sequence system is stored as B, and from then on, the ESC sequence system processing routine is performed until the ESC sequence system switching code is received. The above processing is done in ROM
The microprocessor 22 reads and executes the firmware stored in the microprocessor 24.

As described above, the code system is switched online using the ESCSC cheese system switching code without using a DIP switch or a memory switch or a memory switch.

[Effects of the Invention] As explained above, printing using tasks that support different ESC sequence systems can be performed using the ESC on the printer main body side.
There is no need to turn on the power again to switch the sequence system, thus reducing the burden on the operator.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Host computer, 2... Printer control device, 4... Dual mode printer, 22... Microprocessor, 23... RAM, 24... ROM
. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] In a dual-mode printer that operates in two or more modes with different connection interfaces, the printer recognizes when a code for switching escape sequences has arrived from the main unit and stores it, and stores the escape sequences and subsequent codes that will be received thereafter. The printer control device includes means for processing in the selected mode, and means for storing the next command for switching when it is received, and processing using the stored code system until receiving the command for switching. A mode switching method for a dual mode printer, characterized in that the printer control device switches the code system online by recognizing a command for switching the escape sequence coming from the printer main body.