JPS6256546B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an electronic device that combines a television receiver, a radio receiver, a tape recorder, and an electronic calculator. In Patent Application No. 57833 of 1978 (filed on May 15, 1973, title of the invention is "Electronic Equipment"), the applicant organically combined these to convert the display part of a television (cathode ray tube) into a computer. We have proposed an electronic device that can be used as a display, input data from a tape recorder to a computer, or record data output from a computer on a tape recorder. The present invention relates to these improvements, and in view of the fact that it takes a relatively long time to load a program from a tape recorder to a computer, in such cases, the computer function can be left in operation while the TV or radio is being used. In addition to making it possible to see and hear the loading process, if the loading is completed or if there is a loading error, this will be forcibly displayed on the TV receiver, so that the time can be used effectively. be. An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the apparatus of the present invention. 1 is a receiving video circuit, 4 is a video amplification and video detection circuit, 5 is an audio intermediate frequency amplification circuit, and 6 is an audio detection circuit, from which a television audio signal is output. Further, a video signal is outputted from the above-mentioned circuit 4, and a display is performed on the cathode ray display tube CRT based on the signal. In the figure, TU is a tuner for a television receiver and outputs a video intermediate frequency signal. Next, 3 is a radio receiver, 7 is a high frequency amplification circuit, 8 is an intermediate frequency amplification circuit, and 9 is a detection circuit, and the detection circuit 9 outputs a radio audio signal. 10 is a tape recorder, MT is a magnetic tape, HD is a recording/playback head, _A1 is a recording amplifier, and _A2 is a playback amplifier. _S4 is a recording/playback switch, which is linked to the switch _S1 , which will be described later. Here, when playing, connect to side B, and when recording, connect to side A. 12 shows a computer, and CT is a CRT control circuit, which includes a memory (random access memory) that corresponds to the CRT screen and a circuit to read out the stored contents in synchronization with the CRT's raster scan. In preparation, display characters on the CRT. Furthermore, the CG is composed of a decoder that decodes the character code signal output from the CT, a luminance signal generation circuit, a synchronization signal generation circuit, etc., and sequentially decodes the character code signal output from the CT, and the decoded The generated signal is converted into a video signal by the luminance signal generation circuit, synchronization signal generation circuit, etc. The CPU receives key input signals from the keyboard K and performs calculations according to instructions and data stored in the ROM and RAM, and writes the code of the character to be displayed on the CRT to the address of the memory in the CT to be displayed. _A3 is the recording interface of the tape recorder that modulates the binary code output from the CPU and converts it into an audio frequency signal. As will be described later, if _S6 is in the ON state and the tape recorder 10 is in the recording state, the modulated binary code is recorded on the magnetic tape MT.
A ₄ is the reversely modulated binary code “H” or “L”
This is a playback interface that converts the data into binary code. With these functions, it is possible to record programs created by keyboard operations on data cassette tapes, and to record calculation results, etc., and also to record programs and calculation results recorded on data cassette tapes. Can be input to the CPU. 2 is a low frequency amplification circuit, which is used for television, radio,
It receives an audio signal output from the tape recorder, a data cassette tape playback signal output from the tape recorder, and a data signal output from the computer 12 to the tape recorder, and drives the speaker SP. Note that 13 and 14 indicate television and radio antennas. S ₁ is the recording/playback switch for the tape recorder, and is linked to S _4. When playing the tape recorder, both S ₁ and S ₄ are connected to side B. Otherwise, when recording or not using the tape recorder, S 1 and S 4 are connected to side A. connected to the side. _S6 is a switch that is turned on when modulated binary data is input or output between the CPU and the tape recorder, and is turned on or off under the control of the CPU.
It will be turned off. S ₃ , S ₅ , S ₈ , and S ₁₂ are switches controlled by the CPU like S ₆ , and S ₃ is used only when recording binary data on a data cassette tape.
OFF, _S5 is ON, _S8 is ON, otherwise _S3 is ON, _S5 is OFF, _S8 is OFF. _S12 is ON only when reproducing binary data from a data cassette tape, and is OFF otherwise. _S7 is a switch for selecting the signal output from the television tuner TU (a side) and the signal output from the character signal generating circuit CG (b side) and supplying it to the video amplification circuit ₄ . This is a switch for selecting the audio signal output from the television audio detection circuit 6 (a side) and the audio signal output from the radio detection circuit 9 (b side) and supplying the selected audio signal to the low frequency amplifier 2. These switches _S7 and _S2 are controlled in conjunction with the mode selection switch MS. S ₈ to _{S 11} are power control switches connected to the power supply unit PW, and are switches S ₈ , S ₉ , and corresponding to the television receiver 1 , radio receiver 3 , and computer 12 .
_S10 is controlled in conjunction with the mode selection switch MS mentioned above. Note that the switch _S11 corresponding to the tape recorder 10 is independently controlled in connection with the recording and playback operations by button operations of the corresponding part, and is not interlocked with the mode selection switch MS, as in the conventional tape recorder. Mode selection switch MS, RAD,
RADCOM, COMP, TVCOM, TV mode i.e. radio receiver (RAD), calculator (COMP),
It has an independent mode for the television receiver (TV) and a combined mode for the radio receiver/computer (RADCOM) and TV receiver/computer (TVCOM), which are intermediate between the two modes. I am trying to control the selection of functions. The table below shows the interlocking control of the mode selection switch MS.

[Table] In the RAD mode, the switch _S2 is connected to the b side (the switch _S7 can be either the a side or the b side), and only the power control switch _S9 is turned on to supply power to the radio receiver 3. At this time, the tape recorder 10
If it is not in the playback state, switch _S1 is connected to side a, and the radio audio signal is transmitted to low frequency amplifier circuit 2.
and the audio is output from the speaker SP. When recording the radio sound, the tape recorder 10 may be set to the recording state at the same time, and the radio audio signal is supplied to the tape recorder ₁₀ via the normally ON switch S3. When reproducing the tape recorder 10, both S ₁ and S ₄ are connected to the b side, so the signal output from the reproduction amplifier circuit A ₂ is output to 2.
Tape recorder audio is output from the SP. In the case of RADCOM mode, switches S ₇ and S ₂ are both connected to side b, and power control switches S ₈ to _{S 10} are
When turned on, power is supplied to the television receiver 1, radio receiver 3, and computer 12. Therefore, here, the video signal output from the character signal generation circuit CG of the computer 12 is supplied to the video amplification circuit 4, and calculation inputs, calculation results, etc. are displayed on the CRT.
Similar to the RAD mode, a radio audio signal is supplied to the low frequency amplification circuit 4, and the audio is output from the speaker SP. In other words, in this RADCOM mode, the computer and radio can be used at the same time.
A tape recorder can also be used at the same time. With this configuration, calculations can be performed while receiving and recording radio broadcasts. In the case of COM mode, switches S ₇ and S ₂ are connected to the b side as described above, and power control switches S ₈ to _{S 10}
Of these, S ₉ corresponding to Radio 3 is turned off. Therefore, in this mode, even if switch ₂ is connected to the b side, the radio is inoperable, and only the computer operation and display of the computer on the CRT are possible. In TVCOMP mode, both switches S ₇ and S ₂ are connected to side a, and power control switches S ₈ and S ₁₀
is turned on, power is supplied to the television receiver 1 and the computer 12. That is, by connecting the switches S ₇ and S ₂ to the a side, the video signal output from the television tuner TU is supplied to the video amplifier circuit 4.
In addition to displaying television images on CRT,
The television audio signal outputted from the audio detection circuit 6 is supplied to the audio amplifier circuit 2 to output the television audio as well. At this time, power is being supplied to the computer 12, so although the computer is not displayed on the CRT, the computer is in operation and a video signal is being output from the character signal generating circuit CG. In TV mode, in TVCOM mode
The power control switch _S10 corresponding to the computer 12, which had been turned on, was turned off and power was supplied only to the television receiver 1.The television image was displayed on the CRT, and the television sound was transmitted to the speaker SP. output. Of course, since power is not supplied to the computer 12 in this mode,
Computer operation is disabled. In the above modes, computer operation is possible in RADCOM, COMP and TVCOMP modes.
S ₃ , S ₅ , S ₆ , S ₈ , and S ₁₂ are appropriately controlled by the CPU and can perform the following actions. When recording a program created by key operations on keyboard K onto a data cassette tape,
The CPU enters the program writing state by operating a specific key, and writes subsequent key operations as a program to the RAM. The program stored in this RAM is activated by the CPU when a specific key is pressed.
Turn on _S6 to enter the program recording state and output the program to recording interface _A3 . Therefore, if a specific key operation is performed after the tape recorder is placed in a recording state, a program is recorded on the tape. In this case, as described above, _S3 is OFF, _S5 is ON, and _S8 is ON, so the modulated binary signal output from _A3 is output to A2 through _S5 and _S8 . Therefore, it can be confirmed that the signal output to the recording amplifier circuit _A1 is output from the SP as audio and the program is recorded on the tape. Switch S ₃ prevents the radio sound from being output to A ₁ when S ₂ (linked to mode selection switch MS) is connected to the radio, i.e. side b, and prevents the program signal and radio sound output from A ₃ from being output. This is to prevent overlapping. When a computer reads a program recorded on a data cassette tape, the CPU enters the program reading state by pressing the K key.
Turn on _S6 . When the data cassette tape is played back in this state, the playback sound signal is output to 2 and the playback sound is output from SP. At this time, the reproduction sound of the binary data is an intermittent beeping sound, and although the operator cannot understand what it means, it can at least confirm that the program is being input into the computer. Regeneration interface A ₄ receives the regenerated signal.
The CPU converts this program into a binary level signal of “H” or “L” that can be determined by the CPU.
write to. And at the same time RADCOM, COMP
In this mode, the loaded programs are sequentially displayed.
Display on CRT. Playback interface A ₄
Also, only modulated binary data is converted into binary code, and analog signals such as music and voices are not converted into binary code, and the CPU does not receive this as information. For this reason, for example, if you record the program name as audio, such as ``Next is a program to find the area of a polygon'' before recording the program on tape, you will know what the tape is when loading the program from the tape to the computer. You can hear whether it is a tape or not, and avoid mistakes when loading another tape or playing a music tape. On the other hand, during this loading, switch S ₁ is connected to the B side, but S ₁₂ connected to the A side of this is turned on by CPU control, and the radio audio signal is turned on in the RADCOM mode and the radio audio signal in the TVCOM mode. supplies the television audio signal to the audio amplifier circuit 2, superimposes it on the audio of binary data, and outputs the audio. Loading takes a relatively long time, so if you use these modes when loading, it is very effective to watch or listen to television or radio while the computer is loading. Of course, the same applies to cases where the computer operation itself takes a long time. Load execution will be explained in more detail. FIG. 2 shows an example of the recording format of binary data stored on a tape. Preparation signal A is recorded to prepare for subsequent data acquisition. The next address word B specifies the storage location of the data, for example, binary
Specify one address using four words expressed in decimal. Data word C is designed to contain 16 words of data, and the above address word B specifies the address of the first word of data word C, and for subsequent words, the address is sequentially incremented by 1. We are processing it so that it will be done. Check word D records the result of adding one word each of address word B and data word C sequentially without carry, and when loading, data in address mode B and data word C is added without carry. The result is compared with the value of this check word C to detect a load error. This error detection method is generally called the checksum method. An end code E is recorded at the end of the series of data, indicating the end of data recording. The circuit configuration for executing a load inside the CPU shown in FIG. 1 is appropriately picked up and shown. CS is check sum circuit, JE is end code detection circuit, W ₁ and W ₂
is a write circuit for writing characters indicating loading completion or loading error to the display memory in the CT, and CU is a sequential control circuit. During loading, the checksum circuit CS
If a load error is detected, the CU generates a micro order, and the write circuit _W1 writes characters indicating the load error to the display memory in the CT. Also, if end code E is detected,
Generates micro-order from CU and writes circuit W ₂
Writes characters indicating the end of loading to the display memory in the CT. With these, on a CRT, for example, as shown in Figure 3a and b, "LOAD
ERROR" and "LOAD END" are displayed to notify you of a loading error or load completion. In addition,
In TVCOM mode, switch _S7 is connected to side a and cannot display the above information. However, here, a micro-order is generated at the same time as a micro-order or is generated, and the micro-order bypasses the b-side contact of switch _S7 , and the reversed micro-order blocks the a-side passage. I try to do that. Therefore, even in the TVCOM mode, the above-mentioned display can be performed by switching the screen of the television receiver in these cases. In addition, in the case of a loading error or loading completion
Usability can be further improved by providing an alarm sound along with the CRT display. Flip-flops F ₁ , F ₂ in the CPU in Figure 1
And the alarm sound generation circuits AL ₁ and AL ₂ connected to these set output terminals follow this, and the flip-flop F ₁ or F ₂ is set by micro order or by the alarm sound generation circuit AL. ₁ or AL ₂ to drive. In the figure, alarm sound generation circuit AL ₁ and
The line connecting AL ₂ is for supplying key touch sound to 2, but of course other lines can also be used. As described in detail above, the device of the present invention combines at least a television receiver, a tape recorder, and an electronic calculator, displays the computer on the television display device, and uses the tape recorder as an external storage device. and effectively utilizes the functions of the tape recorder. Furthermore, according to the present invention, even if the mode selection is switched, the computer, radio, and television can be used at the same time by keeping the computer's power source separate. can be used and is useful. Furthermore, when a load completion or a load error is detected in this load execution, these are executed in any mode in which the computer is operating.
Since the information can be displayed on the CRT and notified to the user, time loss can be eliminated and time can be used effectively. In the embodiment of the present invention, a television, a radio, a tape recorder, and a computer are incorporated into the same case, but even if each is separate, the same effect can be obtained by electrically connecting them.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a diagram showing an example of a tape recording format, and FIGS. 3a and 3b are diagrams showing an example of display on a CRT. In the figure, 1: Receiving video device, 2: Low frequency amplification circuit, 3: Radio receiving device, 10: Tape recorder, 12: Computer, K: Key input unit, MS: Mode selection switch, PW: Power supply, CS: Checksum circuit, JE: End code detection circuit, W ₁ ,
W ₂ : Write circuit, CU: Sequential control circuit, B: Address word, C: Data word,
D: Check word, E: End code.

Claims (1)

[Scope of Claims] 1 A television receiver, a radio receiver, a tape recorder, an electronic calculator, etc. are combined, the television receiver is used as a display device for the electronic calculator, and the tape recorder is used as a display device for the electronic calculator. A device used as an external storage device for a formula calculator, which includes means for separately controlling the power supply to each of the above parts, means for simultaneously operating other functions while leaving the calculator function in operation, and the above-mentioned tape. When executing a load from a recorder to an electronic calculator, there is a means for detecting completion of loading and a loading error, and writing text information to display memory indicating completion of loading or error in loading according to the detection output. and means for displaying character information written in the display memory by switching the screen of the television receiver.