JPS622342A - Information transmission equipment - Google Patents

Abstract

PURPOSE:To output information from plural data sourve having each different command system by a different command system output equipment by providing a code converting means corresponding to two or more data sources and a selecting means for selecting and outputting these outputs. CONSTITUTION:The CPU 450 of a main control part 45 detects a data reception by each strobe signal 60-63, outputs, a select signal 75 and reads a data through a selector 42. When a received data is a command, the output data of a corresponding command converts is outputted to the output bus 54 of a selector 43 by the signal 75. Subsequently, a select signal 72 is set to an H level and the contents of the bus 54 are outputted to a data bus 20 through a selector 44. On the other hand, when the received data is a data, the data of each latching circuit 34-37 is outputted onto a bus 55 through the selector 42 by the signal 75. Next, the signal 72 is set to an L level and the data of the bus 55 is outputted to the bus 20. When a printing device 15 is not busy, a strobe signal 73 is transmitted to the printing device 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an information transmission device that outputs information from a data source such as a host computer to an output device such as a printer.

[Summary of the Disclosure] This specification and the drawings describe an information transmission device that outputs information from a data source such as a host computer to an output device such as a printer, and an information transmission device that outputs information from a data source such as a host computer to at least two data sources and at least one output device. An intervening information transmission device that converts information from the data sources each having an independent information system into the information system of the output device and outputs the information, and outputs the information from a plurality of data sources having different command systems. This invention discloses a technology for an information transmission device that can output information on output devices with different command systems.

[Prior Art J] Conventionally, this type of device only had the function of directly sending the output data sent from each host computer to, for example, a printing device. When printing data sent from a computer, it is necessary to use a printing device that matches the command system on the printing device side.For example, a printing device for host computer A, a printing device for host computer B, etc. There was a problem in that if there were four host computers, each with a different command system, four printers would be required.

[Problem to be solved by the invention J The present invention has been made in view of the above-mentioned conventional example.

It is an object of the present invention to provide an information transmission device that can output information from a plurality of data sources having different command systems using an output device having different command systems.

[Means for Solving the Problem] As a means for solving this problem, for example, the information transmission device 14 of the embodiment shown in FIG. 81 includes code conversion means 21 corresponding to at least two data sources and each code conversion means A selection means 22 is provided for selecting and outputting the output.

[Operation] In the configuration shown in FIG. 1, the data from each data source 10-13 is converted by each code conversion means 21 into a code corresponding to the output device 9, and the output is switched by the selection means 22 and sent to the output device 9. Output to.

"Embodiments" Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of overall block diagram (Fig. 2)] J Fig. 2 is a block diagram of an information transmission device showing an embodiment of the present invention.

14 is an information transmission device, 10 to 13 are data sources each having an independent command system, and 15 is a printing device. 4
2 to 44 are selectors that select and output one of a plurality of input data; 45 is a main control unit that controls the entire device;
RO with built-in 450 and its control program and data
M451. It is equipped with RAM452. 30 to 33 are command converters that convert input information having various command systems into a command system compatible with the printing device 15; 34 to 37 are latch circuits that latch data from the data sources 10 to 13; 38; -41 are R-S type flip-flops.

16 to 19 are data buses from each data alO to 13,
60 to 63 are strobe signals for data latch of data buses 16 to 19, 64 to 67 are busy signals sent back to each data source 10 to 13, and 68 to 71 are flip-flops 3.
8 to 41 reset signals.

[Operation Description (Fig. 2) (Fig. 3)] Next, an example of the operation of the present device in the above configuration will be explained based on Figs. 2 and 3.

When data is sent from the host computer 10, which is the data source, to the data bus 16, the data is sent to the rising edges 301 to 303 of the strobe signal 60.
is latched by the latch circuit 34. The flip-flop 38 is set by the fall of the strobe signal 60, and the busy signal 64 is turned on (timing T1
・~T3), this busy signal 64 is reset by the signal 68 from the main control unit 45 (timing T4~T3).
s). The main control unit 45 detects that data is latched in the trigger circuit 34 using the strobe signal 60.

The output of the 10,000 latch circuit 34 is sent to the command converter 30 and is also input to the selector 42. monarchy W45
outputs a select signal 75, outputs this data onto the bus 55, and checks whether the content of the data is a command by reading it.

The command converter 30 contains a command conversion table for converting commands from the host computer 10 into commands for the printing device 15. At timing 304, when "command 1" is first sent from the host computer, the command converter 30 converts it into "command 1'".
is converted to On the other hand, the main control device 45 uses "command l"
is determined to be command information, the select signal 75 is output in order to output the output signal 50 of the command converter 30 to the bus 54.
is output and the data signal 50 is sent to the bus 5 by the selector 43.
4, and then at timing 307 the signal 72 is set to H.
level, the data bus 20 is connected to the command converter 3.
"Data 1" sent at timing 305 and 306 to the next 0 where "command 1'" which is the output of 0 is output,
Since "Data 2" is determined as data information, the signal 72 is set to L level (timing T7), and "Data 1" and "Data 2" are transferred to the data bus 20 via the selector 42 and the bus 55 as they are. It is output (timing T8 and T9).

Similarly, the data "command 2" sent from the host computer of the data source 12 is converted by the command converter 32 into a command "command 2'" for the printing device 15, and the main controller 45 converts it into command information. Data bus 2 is determined by select signals 75 and 72.
0 as "command 2'" (timing T10). Furthermore, since the subsequently sent "data 3" and "data 4" are data information, the signal 72 is set to the L level, so that they are output directly onto the data bus 20 via the bus 55.

[Explanation of operation of main control unit (Fig. 2) (Fig. 4)] Fig. 4 shows the CPU 450 stored in the ROM 451 of the main control unit 45.
2 is a flowchart of a control operation program.

When reception of data is detected by each of the strobe signals 60 to 63 in step S1, it is determined in step S2 which data source the data comes from, and in step S3 the select signal 7 is detected.
5 and reads the data through the selector 42.

At this time, the busy signal (any one of 64 to 67) for the data source that transmitted the data is at H level, prohibiting the next data transmission. It is checked in step S4 whether the received data is a command. This may be determined by the content of the code, food sequence, or other control line indicating that it is a command.

If the received data is a command, the process advances to step S5, and the select signal 75 sends the output bus 54 of the selector 43 to the output bus 54 of the selector 43.
Outputs the output data of the corresponding command converter. Subsequently, in step S6, the select signal 72 is set to H level and passed through the selector 44', the contents of the bus 54 are output to the data bus 20, and the process proceeds to step S9.

If the 10,000 received data is data, proceed to step S7;
The select signal 75 outputs the data of each latch circuit onto the bus 55 through the selector 42, and in step S8, the selector signal 72 is set to L level to output the data on the bus 55 to the data bus 20, and the process proceeds to step S9.

In step S9, a busy line 74 indicating that the printing device 15 is busy is checked to see if the printing device 15 is capable of receiving data. When data reception is possible, the process proceeds to step SIO, outputs the strobe signal 73, and prints the data to the printing device 1.
Send data to 5. Thereafter, in step Sll, reset signals 68-71 are outputted to cancel the busy signals 64-67 for data 910-13.

In this embodiment, the command converter is described as a ROM, but the present invention is not limited to this, and the selectors 43 and 44 may be omitted depending on the command converter.

Furthermore, for example, by providing a main control unit with memory for multiple pages and managing data for each data source, the usage efficiency of data sources can be improved.1. Moreover, the printing device can also output data corresponding to each data source, improving usage efficiency.

In this embodiment, the output device is explained as one unit, but the output device is not limited to this, and the output device is not limited to a printing device, but can also be used, for example, a display device such as a CRT, or a printing device such as a copying machine. Of course, it is also good.

(Effects of the Invention) As described above, according to the present invention, information from a plurality of data sources having different command systems can be outputted by output devices having different command systems.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing how an information transmission device according to an embodiment of the present invention is used, FIG. 2 is an overall configuration diagram of an embodiment of the present invention, and FIG.
4 is a timing chart of each signal in the figure. FIG. 4 is a flowchart showing the operation of the main control section. In the figure, 9...output device, 10-13... data source. 14... Information transmission device, 15... Printing device, 21.
...Code conversion means, 22...Selection means, 30 to 33
...Code converter, 34-37...Latch circuit, 3
8~41...R-S type flip-flop, 42~
44...Selector, 45...Main control unit, 60-63
...Strobe signal, 64-47...Busy signal,
68-71...Reset signal, 72.75...
・This is a select signal.

Claims (1)

[Claims] An information transmission device that is interposed between at least two data sources and at least one output device, and configured to convert information from the data sources each having an independent information system into an information system of the output device and output the converted information. An information transmission device characterized by: