Abstract:
To provide an easy-to-use user interface in lieu of only pushing or holding down a simple ON/OFF switch by a user, a computer is provided that performs processing by taking as instructions an output from a controller coupled to the computer. The controller has at least two or more pressure-sensitive units, and performs data processing depending on the outputs from the two or more pressure-sensitive units.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates to a recording medium recorded with a program that performs processing depending on a plurality of outputs from a pressure-sensitive unit provided in a controller of a computer that executes this processing and method of using same.  
         BACKGROUND OF THE INVENTION  
         [0002]    In order to play game software running on a computer or a video game machine, a keyboard, a controller, a pointing device or other control means is required. By operating such control means, it is possible to move objects on the screen or perform other such manipulation.  
           [0003]    Each of these control means comprises ON/OFF switches, rotary switches or other switches.  
           [0004]    The movement of objects, for example, is performed continuously by keeping ON an ON/OFF switch of the controller connected to the video game machine, namely, by holding it down by a user.  
           [0005]    For example, there is disclosure of a pressure-sensitive type controller in the publication of examined Japanese utility model application No. JP-B-H1-40545, wherein pressure-sensitive output is provided as input to a VCO (variable control oscillator) and the output of the VCO is used for repeated fire in a game.  
         SUMMARY OF THE INVENTION  
         [0006]    It is an object of the present invention to make such pushing or holding down of a simple ON/OFF switch by a user into an easier-to-use interface for users.  
           [0007]    This and other objects of the present invention are attained by a recording medium according on which is recorded a computer-readable and executable software program that performs processing by taking as instructions the output from a controller which has pressure-sensitive means, wherein the software program comprises a processing program that performs processing depending on at least two outputs of said controller.  
           [0008]    A computer according to the present invention performs processing by taking as instructions the output from a controller, and the controller comprises at least two or more pressure-sensitive means, and performs data processing depending on the outputs from the two or more pressure-sensitive means.  
           [0009]    A method of using a computer according to the present invention uses a computer that performs processing by taking as instructions the output from a controller, and comprises the steps of: detecting a pushing pressure of a user by at least two or more pressure-sensitive means of the controller, and generating a respective pressure-sensitive output, and performing data processing depending on the outputs from the two or more pressure-sensitive means.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIG. 1 is a schematic diagram showing connection of a controller to an entertainment system in order to enable a user of the entertainment system to enjoy game software or videos;  
         [0011]    [0011]FIG. 2A shows an example of a screen display in a tightrope walking game;  
         [0012]    [0012]FIG. 2B shows an example of a display screen in a game wherein an object is moved;  
         [0013]    [0013]FIG. 3 is a flowchart of the processing of a game which includes a program for performing processing using an output of at least two or more pressure-sensitive switches of the example of FIG. 2A;  
         [0014]    [0014]FIG. 4 is a flowchart of the processing of a game which includes a program for performing processing using the output of at least two or more pressure-sensitive switches of the example of FIG. 2B;  
         [0015]    [0015]FIG. 5 is a perspective view showing the controller connected to the entertainment system;  
         [0016]    [0016]FIG. 6 is a block diagram showing the entertainment system;  
         [0017]    [0017]FIG. 7 is a top view of a controller;  
         [0018]    [0018]FIG. 8 is an exploded perspective view showing an embodiment of the constitution of the second control part of the controller;  
         [0019]    FIGS.  9 A- 9 C are cross-sectional views of the second control part of FIG. 8;  
         [0020]    [0020]FIG. 10 is a diagram showing an equivalent circuit for a pressure-sensitive device;  
         [0021]    [0021]FIG. 11 is a block diagram of the main parts of the controller;  
         [0022]    [0022]FIG. 12 is an exploded perspective view showing an embodiment of the constitution of the first control part of the controller;  
         [0023]    [0023]FIG. 13 is a cross-sectional view of the first control part of FIG. 12;  
         [0024]    [0024]FIG. 14 is a diagram showing the circuit configuration of a resistor;  
         [0025]    [0025]FIG. 15 is a graph showing the characteristic of the signal output;  
         [0026]    [0026]FIG. 16 is a block diagram schematically showing the overall constitution including the resistor;  
         [0027]    [0027]FIG. 17 is an exploded perspective view showing an embodiment of the constitution of the third control part of the controller.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0028]    In the present embodiment, various types of processing are performed depending on two pressure-sense values output when at least two pressure-sensitive switches of a controller which has pressure-sensitive devices are operated. Thereby, it is possible to provide a system with a user interface that is improved in comparison to when a single pressure-sensitive switch is used.  
         [0029]    [0029]FIG. 1 is a schematic diagram showing connection of a controller to an entertainment system so that a user can enjoy game software or video. More specific structures are shown in FIG. 5 and other figures of the drawings.  
         [0030]    As shown in this FIG. 1, a controller  200  which has buttons connected to pressure-sensitive devices positioned within the controller is connected to an entertainment system  500  used for playing games or enjoying DVD video or other types of video images, and the video output terminals are connected to a television monitor  408 . Here, the analog output from the pressure-sensitive devices is converted by an A/D converter to digital values in the range 0-255 and provided to the entertainment system  500 .  
         [0031]    With reference to FIGS.  2 - 4 , here follows a description of the case wherein processing is performed depending on the operation of at least two pressure-sensitive switches of the controller  200 .  
         [0032]    [0032]FIG. 2A shows an example of a screen display in a tightrope walking game, for example. FIG. 2B shows an example of a display screen in a game wherein an object M is moved. In both games, at least two or more pressure-sensitive switches are used.  
         [0033]    In the tightrope walking game shown in FIG. 2A, for example, one pressure-sensitive switch each may be pressed with the left and right hands, for example, and while keeping the differential between the outputs of these two pressure-sensitive switches within a stipulated range, a different switch may be pushed to make the character Ca move across the rope R.  
         [0034]    In addition, in the movement game shown in FIG. 2B, for example, one pressure-sensitive switch each may be pressed with the left and right hands, for example, so the object is moved in the x direction based on the output value of the pressure-sensitive switch for the x direction, and the object is moved in the y direction based on the output value of the pressure-sensitive switch for the y direction.  
         [0035]    Next, in reference to FIGS. 3 and 4, the games shown in both FIGS. 2A and B, respectively, will be described. The flowcharts shown in FIGS. 3 and 4 each show the processing of a game that includes a program for performing processing using the outputs of at least two or more pressure-sensitive switches. The program for performing processing using the outputs of at least two or more pressure-sensitive switches may be supplied either recorded alone upon an optical disc or other recording medium, or recorded upon said recording medium together with the game software as part of the game software. Such programs are run by the entertainment system  500  and executed by its CPU.  
         [0036]    First, the tightrope walking game in reference to FIG. 3 will be explained.  
         [0037]    In Step S 1 , two pressure-sense values are acquired from the controller  200 , and in Step S 2 , a decision is made as to whether or not the difference between the two pressure-sensing values thus acquired is within a stipulated range, and if “YES” then control processing moves to Step S 3 , but if “NO” then a “fall” process is performed. The “fall” process has the meaning of showing the character Ca falling from the rope, displayed as animation.  
         [0038]    Here, the stipulated range can be gradually made more narrow, for example, as the levels advance in the tightrope walking game. For example, the stipulated range may be 20 on the first level, 10 on the next level and so on, gradually becoming narrower, so the user must make the pressure at which the pressure-sensitive switches are pushed with both fingers equal or fall. The differential between the output values of the individual pressure-sensitive switches pushed is found and, after correction if necessary, then compared against the stipulated range.  
         [0039]    In Step S 3 , a decision is made as to whether or not input indicating “advance” is present and if “YES” then in Step S 4  the “advance” process is performed, namely, showing the character Ca moving upon the rope R, displayed as animation, and the distance moved is stored.  
         [0040]    In Step S 5 , the distance moved thus stored is compared against the overall distance, and if the stored distance moved is equal to or greater than the overall distance, then the end has been reached, so a decision of “YES” results and this level ends, but if “NO” then control processing moves back to Step S 1 .  
         [0041]    Next, the movement game in reference to FIG. 4 will be explained.  
         [0042]    In Step S 1 , two pressure-sensing values are acquired from the controller  200 , In Step S 2 , an address depending on the pressure-sensing value for the x direction is set. In Step S 3 , an address depending on the pressure-sensing value for the y direction is set. Note that the pressure-sense values are in the range 0-255, so if the maximum values in both directions are 255, then the same value is used as the address, but if greater than 255, then an address of a stipulated multiple with respect to a unit pressure-sense value is given. For example, if the maximum value of the addresses in the x and y directions is 2550, then an address of 10 is given to a pressure-sensing value of 1. Thus, in this case, the stepping of addresses is 10 each.  
         [0043]    In Step S 4 , the object M is moved to the position indicated by the addresses specified by each of the pressure-sense values in the x direction and y direction. In Step S 5 , a decision is made as to whether or not there is input from the user which indicates “enter,” and if “YES” then end, but if “NO” then in Step S 6 , the addresses are reset and control moves back to Step S 1 .  
         [0044]    In addition, while the examples described above described processes where the output of two pressure-sensitive switches is applied to a tightrope walking game or movement game, by using three pressure-sensitive switches, it is possible to move an object in three-dimensional space, for example, in the x, y and z directions.  
         [0045]    Note that rather than the magnitude of the pressure-sense value of the pressure-sensitive switch, it is also possible to find the percent change from the previous pressure-sensing value to the current pressure-sense value, and perform the movement at an incremental movement which depends on this percent change. For example, if the previous pressure-sensing value is 100 and the current pressure-sensing value is 50, then the percent change is 50%, so the incremental movement may be made ½the previous.  
         [0046]    As described above, with the present embodiment, processing is performed depending on the output of two or more pressure-sensitive switches, so it is possible to improve the game play of games having processing programs using the output of one pressure-sensitive switch, and thus improve the user interface.  
         [0047]    It should be noted that while in the aforementioned examples, the processing using the output of two or more pressure-sensitive switches was explained with examples of application to a tightrope walking game and movement game, it need not be said that it is also applicable to any kind of game that requires processing using the output of two or more pressure-sensitive switches, including role-playing games, for example.  
         [0048]    [0048]FIG. 5 is a perspective view showing the controller  200  connected to entertainment system  500 . The controller  200  is removably connected to the entertainment system  500 , and the entertainment system  500  is connected to television monitor  408 .  
         [0049]    The entertainment system  500  reads the program for a computer game from recording media upon which that program is recorded and by executing the program displays characters on the television monitor  408 . The entertainment system  500  has also various built-in functions for DVD (Digital Versatile Disc) playback, CDDA (compact disc digital audio) playback and the like. The signals from the controller  200  are also processed as one of the aforementioned control functions within the entertainment system  500 , and the content thereof may be reflected in the movement of characters and the like, on the television monitor  408 .  
         [0050]    While this depends also on the content of the computer game program, controller  200  may be allocated functions for moving the characters displayed on the television monitor  408  in the directions up, down, left or right.  
         [0051]    With reference to FIG. 6, here follows a description of the interior of the entertainment system  500  shown in FIG. 5. FIG. 6 is a block diagram of the entertainment system  500 .  
         [0052]    A CPU  401  is connected to RAM  402  and a bus  403 , respectively. Connected to bus  403  are a graphics processor unit (GPU)  404  and an input/output processor (I/O)  409 , respectively. The GPU  404  is connected via an encoder  407  for converting a digital RGB signal or the like into the NTSC standard television format, for example, to a television monitor (TV)  408  as a peripheral.  
         [0053]    Connected to the I/O  409  are a driver (DRV)  410  used for the playback and decoding of data recorded upon an optical disc  411 , a sound processor (SP)  412 , an external memory  415  consisting of flash memory, controller  200  and a ROM  416  which records the operating system and the like. The SP  412  is connected via an amplifier  413  to a speaker  414  as a peripheral.  
         [0054]    Here, the external memory  415  may be a card-type memory consisting of a CPU or a gate array and flash memory, which is removably connected via a connector  511  to the entertainment system  500  shown in FIG. 5. The controller  200  is configured such that, when a plurality of buttons provided thereupon are pushed, it gives instructions to the entertainment system  500 . In addition, the driver  410  is provided with a decoder for decoding images encoded based upon the MPEG standard.  
         [0055]    The description will be made now as to how the images will be displayed on the television monitor  408  based on the operation of controller  200 . It is assumed that data for objects consisting of polygon vertex data, texture data and the like recorded on the optical disc  411  is read by the driver  410  and stored in the Ram  402  of the CPU  401 .  
         [0056]    When instructions from the player via controller  200  are provided as an input to the entertainment system  500 , the CPU  401  calculates the three-dimensional position and orientation of objects with respect to the point of view based on these instructions. Thereby, the polygon vertex data for objects defined by X, Y, Z coordinates values are modified variously. The modified polygon vertex data is subjected to perspective conversion processing and converted into two-dimensional coordinate data.  
         [0057]    The regions specified by two-dimensional coordinates are so-called polygons. The converted coordinate data, Z data and texture data are supplied to the GPU  404 . Based on this converted coordinate data, Z data and texture data, the GPU  404  performs the drawing process by writing texture data sequentially into the RAM  405 . One frame of image data upon which the drawing process is completed, is encoded by the encoder  407  and then supplied to the television monitor  408  and displayed on its screen as an image.  
         [0058]    [0058]FIG. 7 is a top view of controller  200 . The controller  200  consists of a unit body  201  on the top surface of which are provided first and second control parts  210  and  220 , and on the side surface of which are provided third and fourth control parts  230  and  240  of the controller  200 .  
         [0059]    The first control part  210  of the controller is provided with a cruciform control unit  211  used for pushing control, and the individual control keys  211   a  extending in each of the four directions of the control unit  211  form a control element. The first control part  210  is the control part for providing movement to the characters displayed on the screen of the television receiver, and has the functions for moving the characters in the up, down, left and right directions by pressing the individual control keys  211   a  of the cruciform control unit  211 .  
         [0060]    The second control part  220  is provided with four cylindrical control buttons  221  (control elements) for pushing control The individual control buttons  221  have identifying marks such as “∘” (circle), “×” (cross), “Δ” (triangle) and “□” (quadrangle) on their tops, in order to easily identify the individual control buttons  221 . The functions of the second control part  220  are set by the game program recorded upon the optical disc  411 , and the individual control buttons  221  may be allocated functions that change the state of the game characters, for example. For example, the control buttons  221  may be allocated functions for moving the left arm, right arm, left leg and right leg of the character.  
         [0061]    The third and fourth control parts  230  and  240  of the controller have nearly the same structure, and both are provided with two control buttons  231  and  241  (control elements) for pushing control, arranged above and below. The functions of these third and fourth control parts  230  and  240  are also set by the game program recorded upon the optical disc, and may be allocated functions for making the game characters do special actions, for example.  
         [0062]    Moreover, two joy sticks  251  for performing analog operation are provided upon the unit body  201  shown in FIG. 7. The joy sticks  251  can be switched and used instead of the first and second control parts  210  and  220  described above. This switching is performed by means of an analog selection switch  252  provided upon the unit body  201 . When the joy sticks  251  are selected, a display lamp  253  provided on the unit body  201  lights, indicating the state wherein the joy sticks  251  are selected.  
         [0063]    It is to be noted that on unit body  201  there are also provided a start switch  254  for starting the game and a select switch  255  for selecting the degree of difficulty or the like at the start of a game, and the like.  
         [0064]    Controller  200  is held by the left hand and the right hand of a user and is operated by the other fingers of the user, and in particular the user&#39;s thumbs are able to operate most of the buttons on the top surface.  
         [0065]    [0065]FIG. 8 and FIGS.  9 A- 9 C are, respectively, an exploded perspective view and cross-sectional views showing the second control part of the controller.  
         [0066]    As shown in FIG. 8, the second control part  220  consists of four control buttons  221  which serve as the control elements, an elastic body  222 , and a sheet member  223  provided with resistors  40 . The individual control buttons  221  are inserted from behind through insertion holes  201   a  formed on the upper surface of the unit body  201 . The control buttons  221  inserted into the insertion holes  201   a  are able to move freely in the axial direction.  
         [0067]    The elastic body  222  is made of insulating rubber or the like and has elastic areas  222   a  which protrude upward, and the lower ends of the control buttons  221  are supported upon the upper walls of the elastic areas  222   a . When the control buttons  221  are pressed, the included-surfaced portions of these elastic areas  222   a  flex so that the upper walls move together with the control buttons  221 . On the other hand, when the pushing pressure on the control buttons  221  is released, the flexed inclined-surface portions of elastic areas  222   a  elastically return to their original shape, pushing up the control buttons  221 .  
         [0068]    The elastic body  222  functions as a spring means whereby control buttons  221  which had been pushed in by a pushing action are returned to their original positions. As shown in FIGS.  9 A- 9 C conducting members  50  are attached to the rear surface of the elastic body  222 .  
         [0069]    The sheet member  223  consists of a membrane or other thin sheet material which has flexibility and insulating properties. Resistors  40  are provided in appropriate locations on this sheet member  223  and these resistors  40  and conducting member  50  are each disposed such that they face one of the control buttons  221  via the elastic body  222 . The resistors  40  and conducting members  50  form pressure-sensitive devices. These pressure-sensitive devices consisting of resistors  40  and conducting members  50  have resistance values that vary depending on the pushing pressure received from the control buttons  221 .  
         [0070]    To describe this in more detail, as shown in FIGS.  9 A- 9 C, the second control part  220  is provided with control buttons  221  as control elements, an elastic body  222 , conducting members  50  and resistors  40 . Each conducting member  50  may be made of conductive rubber which has elasticity, for example, and has a conical shape with its center as a vertex. The conducting members  50  are adhered to the inside of the top surface of the elastic areas  222   a  formed in the elastic body  222 .  
         [0071]    In addition, the resistors  40  may be provided on an internal board  204 , for example, opposite the conducting members  50 , so that the conducting members  50  come into contact with resistors  40  together with the pushing action of the control buttons  221 . The conducting member  50  deforms, depending on the pushing force on the control button  221  (namely the contact pressure with the resistor  40 ), so as shown in FIGS. 9B and 9C, the surface area in contact with the resistor  40  varies depending on the pressure. To wit, when the pressing force on the control button  221  is weak, as shown in FIG. 9B only the area near the conical tip of the conducting member  50  is in contact. As the pressing force on the control button  221  becomes stronger, the tip of the conducting member  50  deforms gradually so the surface area in contact expands.  
         [0072]    [0072]FIG. 10 is a diagram showing an equivalent circuit for a pressure-sensitive device consisting of a resistor  40  and conducting member  50 . As shown in this diagram, the pressure-sensitive device is inserted in series in a power supply line  13 , where the voltage V cc  is applied between the electrodes  40   a  and  40   b . As shown in this diagram, the pressure-sensitive device is divided into a variable resistor  42  that has the relatively small resistance value of the conducting member  50 , and a fixed resistor  41  that has the relatively large resistance value of the resistor  40 .  
         [0073]    Among these, the portion of the variable resistor  42  is equivalent to the portion of resistance in the contact between the resistor  40  and the conducting member  50 , so the resistance value of the pressure-sensitive device varies depending on the surface area of contact with the conducting member  50 .  
         [0074]    When the conducting member  50  comes into contact with the resistor  40 , in the portion of contact, the conducting member  50  becomes a bridge instead of the resistor  40  and a current flows, so the resistance value becomes smaller in the portion in contact. Therefore, the greater the surface area of contact between the resistor  40  and conducting member  50 , the lower the resistance value of the pressure-sensitive device becomes. In this manner, the entire pressure-sensitive device can be understood to be a variable resistor. It should be noted that FIGS.  9 A- 9 C show only the contact portion between the conducting member  50  and resistor  40  which forms the variable resistor  42  of FIG. 10, but the fixed resistor of FIG. 10 is omitted from FIGS.  9 A- 9 C.  
         [0075]    In the preferred embodiment, an output terminal is provided near the boundary between the variable resistor  42  and fixed resistor  41 , namely near the intermediate point of the resistors  40 , and thus a voltage stepped down from the applied voltage V cc  by the amount the variable resistance is extracted as an analog signal corresponding to the pushing pressure by the user on the control button  221 .  
         [0076]    First, since a voltage is applied to the resistor  40  when the power is turned on, even if the control button  221  is not pressed, a fixed analog signal (voltage) V min  is provided as the output from the output terminal  40   c . Next, even if the control button  221  is pressed, the resistance value of this resistor  40  does not change until the conducting member  50  contacts the resistor  40 , so the output from the resistor  40  remains unchanged at V min .  
         [0077]    If the control button  221  is pushed further and the conducting member  50  comes into contact with the resistor  40 , the surface area of contact between the conducting member  50  and the resistor  40  increases in response to the pushing pressure on the control button  221 , and thus the resistance of the resistor  40  is reduced so the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  increases. Furthermore, the analog signal (voltage) output form the output terminal  40   c  of the resistor  40  reaches the maximum V max  when the conducting member  50  is most deformed.  
         [0078]    [0078]FIG. 11 is a block diagram showing the main parts of the controller  200 . An MPU  14  mounted on the internal board of the controller  200  is provided with a switch  18 , an A/D converter  15  and two vibration generation systems. The analog signal (voltage) output from the output terminal  40   c  of the resistor  40  is provided as the input to the A/D converter  16  and is converted to a digital signal.  
         [0079]    The digital signal output from the A/D converter  16  is sent via an interface  17  provided upon the internal board of the controller  200  to the entertainment system  500  and the actions of game characters and the like are executed based on this digital signal.  
         [0080]    Changes in the level of the analog signal output form the output terminal  40   c  of the resistor  40  correspond to changes in the pushing pressure received form the control button  221  (control element) as described above.  
         [0081]    Therefore, the digital signal outputted from the A/D converter  16  corresponds to the pushing pressure on the control button  221  (control element) from the user. If the actions of the game characters and the like are controlled based on the digital signal that has such a relationship with the pushing pressure from the user, it is possible to achieve smoother and more analog-like action than with control based on a binary digital signal based only on zeroes and ones.  
         [0082]    The configuration is such that the switch  18  is controlled by a control signal sent from the entertainment system  500  based on a game program recorded on an optical disc  411 .  
         [0083]    When a game program recorded on optical disc is executed by the entertainment system  500 , depending on the content of the game program, a control signal is provided as output to specify whether the A/D converter  16  is to function as a means of providing output of a multi-valued analog signal, or as a means of providing a binary digital signal. Based on this control signal, the switch  18  is switched to select the function of the A/D converter  16 .  
         [0084]    [0084]FIGS. 12 and 13 show an example of the configuration of the first control part of the controller.  
         [0085]    As shown in FIG. 12, the first control part  210  includes a cruciform control unit  211 , a spacer  212  that positions this control unit  211 , and an elastic body  213  that elastically supports the control unit  211 . Moreover, as shown in FIG. 13, a conducting member  50  is attached to the rear surface of the elastic body  213 , and the configuration is such that resistors  40  are disposed at the positions facing the individual control keys  211   a  (control elements) of the control unit  211  via the elastic body  213 .  
         [0086]    The overall structure of the first control part  210  has already been made public knowledge in the publication of unexamined Japanese patent application No. JP-A-H8-163672. The control unit  211  however, uses a hemispherical projection  212   a  formed in the center of the spacer  212  as a fulcrum, and the individual control keys  211   a  (control elements) are assembled such that they can push on the resistor  40  side (see FIG. 13).  
         [0087]    Conducting members  50  are adhered to the inside of the top surface of the elastic body  213  in positions corresponding to the individual control keys  211   a  (control elements) of the cruciform control unit  211 . In addition, the resistors  40  with a single structure are disposed such that they face the individual conducting members  50 .  
         [0088]    When the individual control keys  211   a  which are control elements are pushed, the pushing pressure acts via the elastic body  213  on the pressure-sensitive devices consisting of a conducting member  50  and resistor  40 , so that its electrical resistance value varies depending on the magnitude of the pushing pressure.  
         [0089]    [0089]FIG. 14 is a diagram showing the circuit configuration of the resistor. As shown in this diagram, the resistor  40  is inserted in series in a power supply line  13 , where a voltage is applied between the electrodes  40   a  and  40   b . The resistance of this resistor  40  is illustrated schematically, as shown in this diagram, the resistor  40  is divided into first and second variable resistors  43  and  44 . Among these, the portion of the first variable resistor  43  is in contact, respectively, with the conducting member  50  that moves together with the control key (up directional key)  211   a  for moving the character in the up direction, and with the conducting member  50  that moves together with the control key (left directional key)  211   a  for moving the character in the left direction, so its resistance value varies depending on the surface area in contact with these conducting members  50 .  
         [0090]    In addition, the portion of the second variable resistor  44  is in contact, respectively, with the conducting member  50  that moves together with the control key (down directional key)  211   a  for moving the character in the down direction, and with the conducting member  50  that moves together with the control key (right directional key)  211   a  for moving the character in the right direction, so its resistance value varies depending on the surface area in contact with these conducting members  50 .  
         [0091]    Moreover, an output terminal  40   c  is provided intermediate between the variable resistors  43  and  44 , and an analog signal corresponding to the pushing pressure on the individual control keys  211   a  (control elements) is provided as output from this output terminal  40   c.    
         [0092]    The output from the output terminal  40   c  can be calculated from the ratio of the split in resistance value of the first and second variable resistors  43  and  44 . For example, if R1 is the resistance value of the first variable resistor  43 , R2 is the resistance value of the second variable resistor  44  and V cc  is the power supply voltage, then the output voltage V appearing at the output terminal  40   c  can be expressed by the following equation.  
           V=V   cc   ×R 2/( R 1+ R 2)  
         [0093]    Therefore, when the resistance value of the first variable resistor  43  decreases, the output voltage increases, but when the resistance value of the second variable resistor  44  decreases, the output voltage also decreases.  
         [0094]    [0094]FIG. 15 is a graph showing the characteristic of the analog signal (voltage) output from the output terminal of the resistor.  
         [0095]    First, since a voltage is applied to the resistor  40  when the power is turned on, even if the individual control keys  211   a  of the control unit  211  are not pressed, a fixed analog signal (voltage) V 0  is provided as output from the output terminal  40   c  (at position  0  in the graph).  
         [0096]    Next, even if one of the individual control keys  211   a  is pressed, the resistance value of this resistor  40  does not change until the conducting member  50  contacts the resistor  40 , and the output from the resistor  40  remains unchanged at V 0 .  
         [0097]    Furthermore, if the up-directional key or left-directional key is pushed until the conducting member  50  comes into contact with the first variable resistor  43  portion of the resistor  40  (at position p in the graph), thereafter the surface area of contact between the conducting member  50  and the first variable resistor  43  portion increases in response to the pushing pressure on the control key  211   a  (control elements), and thus the resistance of that portion is reduced so the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  increases. Furthermore, the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  reaches the maximum V max  when the conducting member  50  is most deformed (at position q in the graph).  
         [0098]    On the other hand, if the down-directional key or right-directional key is pushed until the conducting member  50  comes into contact with the second variable resistor  44  portion of the resistor  40  (at position r in the graph), thereafter the surface area of contact between the conducting member  50  and the second variable resistor  44  portion increases in response to the pushing pressure on the control key  211   a  (control elements), and thus the resistance of that portion is reduced, and as a result, the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  decreases. Furthermore, the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  reaches the minimum V min  when the conducting member  50  is most deformed (at position s in the graph).  
         [0099]    As shown in FIG. 16, the analog signal (voltage) output from the output terminal  40   c  of the resistor  40  is provided as input to an A/D converter  16  and converted to a digital signal. It is to be noted that the function of the A/D converter  16  shown in FIG. 16 is as described previously based on FIG. 11, so a detailed description shall be omitted here.  
         [0100]    [0100]FIG. 17 is an exploded perspective view of the third control part of the controller.  
         [0101]    The third control part  230  consists of two control buttons  231 , a spacer  232  for positioning these control buttons  231  within the interior of the controller  200 , a holder  233  that supports these control buttons  231 , an elastic body  234  and an internal board  235 , having a structure wherein resistors  40  are attached to appropriate locations upon the internal board  235  and conducting members  50  are attached to the rear surface of the elastic body  234 .  
         [0102]    The overall structure of the third control part  230  also already has been made public knowledge in the publication of unexamined Japanese patent application No. JPA-H8-163672, so a detailed description thereof will be omitted. The individual control buttons  231  can be pushed in while being guided by the spacer  232 , the pushing pressure when pressed acts via the elastic body  234  on the pressure-sensitive device consisting of a conducting member  50  and resistor  40 . The electrical resistance value of the pressure-sensitive device varies depending on the magnitude of the pushing pressure it receives.  
         [0103]    It is noted that the fourth control part  240  has the same structure as that of the third control part  230  described above.  
         [0104]    While an embodiment was described above, the pressure-sensing value as pushed by the user is used as is. However, in order to correct for differences in the body weights of users or differences in how good their reflexes are, it is possible to correct the maximum value of the user pressure-sensing value to the maximum game pressure-sensing value set by the program, and intermediate values may be corrected proportionally and used. This type of correction is performed by preparing a correction table. In addition, the user pressure-sensing value can be corrected based upon a known function. Moreover, the maximum value of the user pressure-sensing value rate of change may be corrected to the maximum game pressure-sense value rate of change set in the program, and intermediate values can be proportionally corrected and used for more details about this method, refer to the present inventors&#39; Japanese patent application No. 2000-40257 and the corresponding PCT application JP/______ (applicant&#39;s file reference SC0097WO00).  
         [0105]    By means of this invention, various types of processing are performed depending on two pressure-sensing values outputted when at least two pressure-sensitive switches of a controller which has pressure-sensitive devices are operated, so it is possible to provide a system with a user interface that is improved in comparison to when a single pressure-sensitive switch is used.