JPH0214726B2 - - Google Patents

Abstract

PURPOSE:To display a waveform without using a special printer by using a conventional printer having a graph mode, reading the content of a video memory and using a dot pattern to print out waveform information in the graph mode. CONSTITUTION:The video information for patterns' share displayed on a CRT is stored in the video memory 1 and a read means 2 reads the video information of the video memory 1. A preceding bit storage means 3 stores the video information read at one preceding information among the video information of the video memory 1 read by the read means 2. A converting means 4 compares an output of the preceding bit storage means 3 with the video information read by the read means 2 and when the results of comparisor are dissident, that is, in case of [01] or [10], a line ''1'' is outputted to draw a leading line or a trailing line. When the results of comparison are coincident, that is, in case of [11] or [00], it is checked that the value is logical 1, and when the value is logical 1, an upper side point to draw a line at the upper side and when logical 0, the lower side point to draw a line at the lower side is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Technical Field] The present invention relates to a printer control device for printing waveforms and characters stored in a video memory.

[Prior Art] Next, a configuration diagram of a device for printing waveforms and characters according to the prior art will be explained with reference to FIG. 11.

In FIG. 11, 61 is a video memory, 62 is a generator, 63 is a display, and 64 is a printer.

The video memory 61 stores waveform and character data.

When displaying waveforms and characters on the display 63,
Data for a portion to be displayed is generated from a video memory 61 by a generator 62 and displayed on a display device as a video signal. To scroll the screen,
Display data is sequentially generated from the data in the video memory 61 by the generator 62 and displayed.

Further, when the data stored in the video memory 61 is to be printed by the printer 64, the data is printed based on this video signal.

[Problems to be Solved by the Invention] With the configuration shown in Figure 11, the printer can print what is displayed on the CRT screen, but because it is directly driven by video signals, it prints out what is displayed on the CRT screen. The problem is that the content cannot be printed.

An object of the present invention is to directly read the contents of the video memory with a reading means and output the information to a printer, thereby making it possible to print the contents of the video memory that are not directly displayed on the screen of a display device. do.

[Means for Solving the Problem] In order to achieve this objective, in this invention,
a video memory for storing waveform information in a binary manner on a CRT; a reading means for reading out the waveform information;
The output of the previous bit storage means for storing the waveform information previously read by the readout means and the video information read by the readout means is compared, and when it is "11", The upper point [〓], and when it is "00", the lower point [. ],
It is provided with a conversion means for converting "10" or "01" into [|] as print data, and a print means for outputting the print data to a printer.

It also stores waveform information on the CRT in binary form,
a video memory that stores character information as a character code and stores mode switching information for switching between a graphic mode and a character mode; a reading means that reads out the waveform information, the character information, and the mode switching information; a previous bit storage means for storing the waveform information read out the previous time; a determination means for analyzing the content of the mode switching information read out by the reading means;
The determining means compares the output of the previous bit storage means with the waveform information read by the reading means when the information in the video memory is in the graphic mode, and when the information is "11", the upper point [〓] , when it is "00", the lower point [. ], "10" or "01", converting it into [|] as print data; and the print data;
The apparatus includes printing means for outputting character information to a printer when the information in the video memory is in a character mode, and mode storage means for storing whether the printing means is outputting the waveform information or the character information. .

Next, a first configuration diagram according to the present invention will be explained with reference to FIG.

FIG. 1 is a configuration diagram when only waveform data is stored in the video memory.

1 in FIG. 1 is a video memory, 2 is a reading means,
3 is a previous bit storage means, 4 is a converting means, and 5 is a printing means.

The video memory 1 shown in FIG. 1 contains video information as shown in FIG. 2, for example, and the reading means 2
The video information in the video memory 1 is read out.

If the waveform in Figure 2 is expressed numerically, it would be something like "11001100", where "11" means lines lined up horizontally at the top position, and "00" means lines lined up horizontally at the bottom position. shows.

"01" indicates rising from bottom to top, and "10" indicates falling from top to bottom.

As shown in FIG. 12, the video memory 1 stores video information as numerical data for each address.

The previous bit storage means 3 shown in FIG. 1 stores the last video information read out of the video information in the video memory 1 read out by the reading means 2.

The converting means 4 compares the output of the previous bit storage means 3 with the video information read out by the reading means 2, as shown in FIG. 5, which will be described later. When the lower point [. ], “10” or “01”, a [|] symbol is output to the printing means 5.

In the printing means 5, as shown in FIG. 6, which will be described later, a normal printer has a character mode and a graphic mode, and the printer returns to the character mode each time a new line is inserted. Sends a code to switch to graphic mode, converts graphic data,
That is, the upper point [〓], the lower point [. ], and [|] are sequentially combined to express the waveform as shown in FIG.

Next, the flowchart of the reading means 2 is explained in the fourth section.
This will be explained using figures.

In step 11 of FIG. 4, it is determined whether the memory of the video memory 1 is at its end, and in step 12, video information is read from the video memory 1.

In step 13, the video memory address is set to +1, and in step 14, the conversion means is called.

Next, a flowchart of the converting means 4 will be explained with reference to FIG.

At step 15 in FIG. 5, the output of the previous bit storage means 3 and the video information read out by the reading means 2 are compared.

When the comparison result in step 15 is a mismatch, in other words, when it is "01" or "10", a line [|] is output in step 16 to draw a rising line or a falling line.

If the comparison result in step 15 is a match, the content of the match is determined in step 17.

If they match, it is either "11" or "00", so in step 17 it is determined whether the value is "1".

When the value is "1", an upper point [ⓓ] for drawing a line on the upper side is output in step 18.

If the value is not "1", it is "00", so in step 19, the lower point [. ] is output.

Next, the flowchart of the printing means 5 is shown in the sixth section.
This will be explained using figures.

In step 21 of FIG. 6, since the printer returns to the character mode when a line breaks, it is necessary to set the graphics mode again at the beginning of the line, and it is determined whether the printer is at the beginning of the line.

In step 22, a code is sent to put the printer into graphics mode.

In step 23, the converted graphic data is output, and in step 24, the process returns to the reading means 2.

Next, a second configuration diagram according to the present invention will be explained with reference to FIG.

FIG. 7 is a block diagram of a hard copy means for a printer when both waveform data and character data are stored in the video memory.

In FIG. 7, 31 is a video memory, 32 is a reading means, 33 is a previous bit storage means, 34 is a determining means,
35 is a converting means, 36 is a printing means, and 37 is a mode storage means.

The video memory 31 shown in FIG. 7 contains waveform information, character information, and mode switching information as shown in FIG. 13, and the contents of the video memory 31 are read out by the reading means 32.

The waveform information stored in the video memory 31 of FIG. 7 is the same as the video information stored in the video memory 1 of FIG. Therefore, the video memory 31
This means that text information and mode switching information are included in the video memory 1 more than the video memory 1.

The reading means 32, previous bit storage means 33 and converting means 35 operate in the same manner as 1-8 in FIG.

As shown in FIG. 9, which will be described later, the determining means 34 determines the content of the mode switching information read out by the reading means 32, and transmits the result to the converting means 35 or the printing means 36.

As shown in FIG. 10, which will be described later, the printing means 36 has an input 36A for printing waveform information and an input 36B for printing character information, each of which sends converted data for printing.

When the read mode switching information is the graphic mode, the converting means 35 operates as shown in FIG. 5, and the waveform information is transferred to the printing means 3 shown in FIG.
6. Transmit to inlet 36A. If the read mode switching information is not switching to graphic data, that is, if character information is to be printed, the character information is input to the printing means 36 and entrance 36B.

The mode storage means 37 stores whether the printing means 36 is outputting waveform information in a graphic mode or character information in a character mode.

Next, a flowchart of the reading means 32 will be explained with reference to FIG.

8 is almost the same as FIG. 4, except that the converting means 4 is called in step 14 of FIG. 4, whereas the determining means 34 is called in step 44 of FIG.

Next, a flowchart of the determining means 34 will be explained with reference to FIG.

In step 45 of FIG. 9, it is determined whether the read information is mode switching information, and in step 46, it is determined whether or not to switch to the graphics mode.

In step 47, it is determined whether the content of mode storage means 37 is a graphic mode, and in step 48, a connection is made to conversion means 35.

In step 49, the printing means 36 is called and connected to the inlet 36B.

Next, a flowchart of the printing means 36 will be explained with reference to FIG.

Steps 50-53 in FIG. 10 correspond to inlet 36A, and steps 54-58 correspond to inlet 36B.

In step 50, it is determined whether it is the beginning of the line,
In step 51, it is determined whether the mode storage means 37 is in the graphics mode.

In step 52, a code for switching to the graphics mode is sent to the printer, and in step 53, the mode storage means 37 is set to the graphics mode.

In step 54, it is determined whether it is the beginning of the line,
In step 55, it is determined whether the mode storage means 37 is in the graphics mode.

In step 56, a code for switching to the character mode is sent to the printer, and in step 57, the mode storage means 37 is set to the character mode.

In step 58, the read data is converted into a printer code, and in step 59, the converted data is sent to the printer.

In step 60, the process returns to the reading means 32.

[Effects of the Invention] In order to print the contents of the video memory, the present invention stores waveform information, character information, and mode switching information as the contents of the video memory, switches the mode of the printer based on the mode switching information, and prints the waveform information. Since the dot pattern is printed on the printer using the graphics mode, it can be printed using a regular printer, and since the contents of the video memory are directly read out, it can be printed on the CRT screen. Contents of the video memory that are not directly displayed can also be printed.

[Brief explanation of drawings]

FIG. 1 is a first configuration diagram according to the present invention, FIG. 2 is a diagram showing video information in waveforms, and FIG. 3 is a diagram showing the upper point [. ], lower point [〓] and [|] symbols, FIG. 4 is a flowchart of the readout means 2 in FIG. 1, FIG. 5 is a flowchart of the conversion means 4 in FIG. 1, and FIG. 7 is a flowchart of the printing means 5 of FIG. 1, FIG. 7 is a second configuration diagram according to the present invention, FIG. 8 is a flowchart of the reading means 32 of FIG. 7, and FIG. 9 is a flowchart of the judgment of FIG. 10 is a flowchart of the printing means 36 of FIG. 7, FIG. 11 is a block diagram according to the prior art, FIG. 12 is a diagram showing an example of the contents of the video memory 1, and FIG. 13 is a flowchart of the printing means 36 of FIG. 3 is a diagram showing an example of the contents of a video memory 31. FIG. 1...Video memory, 2...Reading means, 3...
...Previous bit storage means, 4...Conversion means, 5...Printing means, 31...Video memory, 32...Reading means, 33...Previous bit storage means, 34...
Judgment means, 35...Conversion means, 36...Printing means, 37...Mode storage means, 61...Video memory, 62...Generator, 63...Display device,
64...Printer.

Claims (1)

[Scope of Claims] 1. A video memory that stores waveform information in a binary manner on a CRT, a readout unit that reads out the waveform information, and a previous bit that stores the waveform information that was previously read by the readout unit. a storage means, comparing the output of the previous bit storage means and the video information read by the reading means;
When it is "11", the upper point [〓], when "00", the lower point [. ], "10" or "01", converting the data into [|] as print data; and a print device outputting the print data to a printer. printer control device. 2. A video memory that stores waveform information to the CRT in a binary manner, stores character information as a character code, and stores mode switching information for switching between graphic mode and character mode, and the waveform information, the character information, and reading means for reading out the mode switching information; previous bit storage means for storing the waveform information read out the previous time by the reading means; determining means for analyzing the content of the mode switching information read out by the reading means; The determining means compares the output of the previous bit storage means with the waveform information read by the reading means when the information in the video memory is in the graphic mode, and when it is "11", the upper point [〓] , when it is "00", the lower point [. ], "10" or "01" to [|] as print data; and when the print data and the information in the video memory are in character mode, output character information to the printer. 1. A printer control device for a hard copy of a CRT screen, comprising: printing means for printing, and mode storage means for storing whether the printing means is outputting the waveform information or the character information.