System timer

Author: f | 2025-04-25

System Timer DOWNLOAD NOW 2,110 downloads so far. System Timer Pc timer Time counter Timer Counter Count Uptime. DOWNLOAD System Timer 4.0 for System Time and Clock Basic System Timer . System Timer In most implementations, system time is provided by a timer interrupt. That timer interrupt runs at rate determined by CONFIG_USEC_PER_TICK (default microseconds or 100Hz. If CONFIG_SCHED_TICKLESS is selected, the default is 100 microseconds). The timer

System Devices / System Timer Driver - Microsoft

Búsquedas relacionadas » goodnight timer 1.1 » smart timer acer smart timer 应用程序 » 555 timer design_555 timer pro download » smart timer acer_smart timer download » acer smart timer ʲô_smart timer download » 555 timer pro_555 timer pro download » cute-timer_cute-timer download » goodnight таймер » teresa medeiros goodnight tweetheart pdf » goodnight ешьук код активации goodnight timer en UpdateStar P Más PowerOFF TIMER 1 PowerOFF TIMER is a software application that helps users manage the power consumption of their computer devices. With this tool, users can schedule automatic shutdowns for their computers at specific times, making it easier to save energy … más información ... Más Startup Timer 1.2 Startup Timer by Macecraft SoftwareStartup Timer by Macecraft Software is a handy tool designed to optimize your computer's startup process by measuring the time it takes for your system to boot up. más información ... Más Timer 12.0 Timer by Cyborg SoftwareTimer by Cyborg Software is a versatile and user-friendly application designed to help you manage your time efficiently and stay organized. más información ... D Más Dell Watchdog Timer 1.0.0.7 DELL - 12602872MB - Shareware - Dell Watchdog Timer is a system monitoring feature developed by Dell. It is designed to prevent system lockups caused by software or hardware issues that could potentially harm the system. más información ... Más Time Timer The Timer Timer app offers a unique and visually appealing way to manage your time. Its iconic red disk disappears as the seconds pass, providing a clear visual representation of time passing. más información ... Más GTD Timer GTD Timer: A Comprehensive Tool for Enhanced ProductivityThe GTD Timer by ProductivityScientific.com is a digital tool designed to facilitate the Getting Things Done (GTD) methodology created by David Allen. más información ... resultados de la búsqueda goodnight timer Descripciones que contiene goodnight timer Más AIMP 5.40.2667 ¡atención!Es posible que esta aplicación no funcione correctamente en dispositivos basados en el firmware M.I.U.I.Características principales:Formatos … más información ... Más WD Drive Utilities 2.1.3.304 WD Drive Utilities de Western Digital es un paquete de software que proporciona a los usuarios herramientas

Simple example of the use of System. Timers. Timer in C

For {7DFEBBA4-81E1-425B-BBAA-06E9E5BBD97E}OS requirements not met for {AAE6F374-91CB-45FB-9282-4CFA0DED2088}OS requirements not met for {B8D286BC-A68D-4E74-9F68-8756A49896D8}OS requirements not met for {C0AA232E-BD1B-40B5-A176-A2BEB67FFAE1}OS requirements not met for {CD29B5CA-4727-4114-9AD9-25CCCE6E4014}OS requirements not met for {DE5DE662-2ECB-4D93-967B-221FBCC8A736}OS requirements not met for {F319804F-E3A4-4C02-8AEC-CB39A4F6447E}OS requirements not met for {F9C71630-0EE3-475C-9E2B-ED95AE197DBD}OS requirements not met for {FBB02B04-C034-4382-A3F6-57416E2752C4}[4544] Fri Jun 13 20:52:54 2014 INFO::START TIMER:: [System check :{02731921-5711-4E7A-A898-D6BCF0F2A1CD}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{02731921-5711-4E7A-A898-D6BCF0F2A1CD}] took 52.4726 miliseconds (0.0524726 seconds)::START TIMER:: [System check :{8CCA90E1-F5BA-456F-84BF-AD5FB2CCE13F}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{8CCA90E1-F5BA-456F-84BF-AD5FB2CCE13F}] took 46.0452 miliseconds (0.0460452 seconds)::START TIMER:: [System check :{0D067D13-C3D7-4EA6-B346-740CD91FD547}]CustomHooksTester -> In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{0D067D13-C3D7-4EA6-B346-740CD91FD547}] took 47.0613 miliseconds (0.0470613 seconds)::START TIMER:: [System check :{04D84E18-23ED-46EA-9B41-789433E34D03}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{04D84E18-23ED-46EA-9B41-789433E34D03}] took 77.5883 miliseconds (0.0775883 seconds)::START TIMER:: [System check :{DE60F0DE-469A-42DC-A678-978313210057}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{DE60F0DE-469A-42DC-A678-978313210057}] took 84.6207 miliseconds (0.0846207 seconds)[4544] Fri Jun 13 20:52:57 2014 INFOPayloads passed preflight validation.Call PreSession Custom HookCalling the custom action code for pre-install for payload {08D2E121-7F6A-43EB-97FD-629B44903403}::START TIMER:: [Payload Operation :{08D2E121-7F6A-43EB-97FD-629B44903403}][5436] Fri Jun 13 20:52:57 2014 INFO*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*Installer Operation: InstallThirdPartyPayloadOperation*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*Installing third party payloadInstalling payloadAttempting to install package from:F:\Adobe CS5\payloads\Microsoft_VC90_CRT_x86\Microsoft_VC90_CRT_x86.msiCommand line arguments: 1: 0 2: 0 3: 1252 1: 2 2: 0 1: 2 2: 1 Installation result: 1620Third party payload succeded. Testing return code: 1620[4544] Fri Jun 13 20:52:58 2014 INFO*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=* Operation complete. Setting status: 2 =*=*=*=*=*=*=*=*=*=*=*=*=*:: END TIMER :: [Payload Operation :{08D2E121-7F6A-43EB-97FD-629B44903403}] took 1003.44 miliseconds (1.00344 seconds)User specified overrideFile: Calling the ROLLBACK custom action code for

What Are System Timers - timerresolution.net

Shutdown Timer is a utlity that will allow you to perform certain actions relating to shutting down the system. The user interface is easy to use and understand and you should be able to get to grips with it. Shutdown Timer can Shutdown, Restart, Logoff, Lock, Hibernate and Standby your system based on certain options, such as Date/Time; CPU & Memory Usage; CPU Temperature and Network Usage. It is a feature full program which can also run in a portable manner, just simply download the portable version and run it from a USB stick. It also includes an updater so you can always get the latest version without constantly checking the website.What are the main features of Shutdown Timer?Shutdown Timer is an advanced shutdown utility, it's more than a shutdown timer! It will allow you to:- Shutdown- Restart- Logoff- Lock- Sleep- Hibernate- Put the Monitor to Standby- Open a file- Open a webpageThese options can be used within the many features Shutdown Timer has, the program uses these modules to provide extra functionality from the regular windows shutdown command. Shutdown Timer has the ability to execute the power saving feature under:- Time & Date- CPU Usage- CPU Temperature- Memory Usage- Network Usage- If a process is running or not- If the system is IdleThe last feature of Shutdown Timer is the ability to wake the system up from sleep!Requirements: Windows XP/Vista/7 - .NET Framework 3.5 SP1 - 10MB Disk Space32Bit:. System Timer DOWNLOAD NOW 2,110 downloads so far. System Timer Pc timer Time counter Timer Counter Count Uptime. DOWNLOAD System Timer 4.0 for

Kid Timer and Reward System

Skip to main content This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. About timers Article08/25/2023 In this article -->This topic describes how to create, identify, set, and delete timers. An application uses a timer to schedule an event for a window after a specified time has elapsed. Each time the specified interval (or time-out value) for a timer elapses, the system notifies the window associated with the timer. Because a timer's accuracy depends on the system clock rate and how often the application retrieves messages from the message queue, the time-out value is only approximate.This topic includes the following sections.Timer OperationsHigh-Resolution TimerWaitable Timer ObjectsRelated topicsTimer operationsApplications create timers by using the SetTimer function. A new timer starts timing the interval as soon as it is created. An application can change a timer's time-out value by using SetTimer and can destroy a timer by using the KillTimer function. To use system resources efficiently, applications should destroy timers that are no longer necessary.Each timer has a unique identifier. When creating a timer, an application can either specify an identifier or have the system create a unique value. The first parameter of a WM_TIMER message contains the identifier of the timer that posted the message.If you specify a window handle in the call to SetTimer, the application associates the timer with that window. Whenever the time-out value for the timer elapses, the system posts a WM_TIMER message to the window associated with the timer. If no window handle is specified in the call to SetTimer, the application that created the timer must monitor its message queue for WM_TIMER messages and dispatch them to the appropriate window.NoteIf you specify the optional TIMERPROC callback function, the function is called during the Message Loop and WM_TIMER is not dispatched to the WNDPROC callback.If you need to be notified when a timer elapses, use a waitable timer. For more information, see Waitable Timer Objects.High-resolution timerA counter is a general term used in programming to refer to an incrementing variable. Some systems include a

Amazon.com: Misting System With Timer

TIMER:: [System check :{8CCA90E1-F5BA-456F-84BF-AD5FB2CCE13F}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{8CCA90E1-F5BA-456F-84BF-AD5FB2CCE13F}] took 51.3852 miliseconds (0.0513852 seconds)::START TIMER:: [System check :{0D067D13-C3D7-4EA6-B346-740CD91FD547}]CustomHooksTester -> In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{0D067D13-C3D7-4EA6-B346-740CD91FD547}] took 50.0657 miliseconds (0.0500657 seconds)::START TIMER:: [System check :{04D84E18-23ED-46EA-9B41-789433E34D03}]In InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{04D84E18-23ED-46EA-9B41-789433E34D03}] took 75.8779 miliseconds (0.0758779 seconds) DTR = 1.72741e+006 KBPS (1686.92 MBPS)::START TIMER:: [System check :{DE60F0DE-469A-42DC-A678-978313210057}][1352] Fri Jun 13 20:27:13 2014 INFOIn InstallPreSystemCheckProcCustom action return code: 0:: END TIMER :: [System check :{DE60F0DE-469A-42DC-A678-978313210057}] took 57.7032 miliseconds (0.0577032 seconds)[1352] Fri Jun 13 20:27:15 2014 INFOPayloads passed preflight validation.Call PreSession Custom HookCalling the custom action code for pre-install for payload {08D2E121-7F6A-43EB-97FD-629B44903403}::START TIMER:: [Payload Operation :{08D2E121-7F6A-43EB-97FD-629B44903403}][4032] Fri Jun 13 20:27:15 2014 INFO*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*Installer Operation: InstallThirdPartyPayloadOperation*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*Installing third party payloadInstalling payloadAttempting to install package from:F:\Adobe CS5\payloads\Microsoft_VC90_CRT_x86\Microsoft_VC90_CRT_x86.msiCommand line arguments: [4032] Fri Jun 13 20:27:17 2014 INFO1: 0 2: 0 3: 1252 1: 2 2: 0 1: 2 2: 1 Installation result: 1620Third party payload succeded. Testing return code: 1620[1352] Fri Jun 13 20:27:17 2014 INFO*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=* Operation complete. Setting status: 2 =*=*=*=*=*=*=*=*=*=*=*=*=*:: END TIMER :: [Payload Operation :{08D2E121-7F6A-43EB-97FD-629B44903403}] took 2002.49 miliseconds (2.00249 seconds) DTR = 47.9403 KBPS (0.0468167 MBPS)User specified overrideFile: Calling the ROLLBACK custom action code for pre-install for payload {08D2E121-7F6A-43EB-97FD-629B44903403} Microsoft_VC90_CRT_x86[1352] Fri Jun 13 20:27:17 2014 WARNPayload cannot be installed due to dependent operation failure[1352] Fri Jun 13 20:27:17 2014 INFOSkipping payload {92D58719-BBC1-4CC3-A08B-56C9E884CC2C} Microsoft_VC80_CRT_x86 as payload is not cached[1352] Fri Jun 13 20:27:17 2014 WARNPayload cannot be installed due to

Watchdog Timer in Embedded System

Consequently, the DAC 24 is disconnected from the output terminal of the tone generator 11. The tone generator 11 outputs the earth level which can block abnormal tone generation, click noises and other accidents. The switch 25 is controlled in response to the control signal SWCONT which is fed to the tone generator 11 from the MPU 1 when the running program incidentally misoperates or hangs up. In detail, the system timer 2 operates as a detector device upon timeup when the running program hangs up to issue NMI to MPU 1. The system timer 2 is normally provided for monitoring or managing process of the OS and application programs. The system timer 2 is resettable everytime the process returns to the OS to restart counting of a preset time. The preset time never lapses as long as the MPU 1 regularly and correctly institutes periodical operation in which the process returns to the OS within the preset time. If the process fails to return to the OS due to misoperation or hangup, the system timer 2 counts up the preset time to thereby issue NMI. FIG. 4 shows a modification of the inventive apparatus. A retriggerable timer 31 is provided as a detector device within the tone generator 11. The timer 31 detects when the currently running program hangs up to change the switch 25 from the DAC 24 to the ground so as to block the output of the DAC 24 while the tone generator 11 outpputs the ground level. FIGS. 5(a)-5(c) are a timing chart showing operation of the FIG. 4 construction. The retriggerable timer 31 is set with an off time OFFTIM. The MPU 1 periodically feeds a retrigger signal to the timer 31 within the off time OFFTIM as long as the MPU 1 operates normally. Therefore, as indicated by the left portion of FIG. 5(a), the timer 31 is periodically retriggered during the course of the regular, correct and periodic operation in the system so that the timer 31 never causes timeup or timeout. In this state, the timer 31 outputs a control signal

Agility Wireless Timer System - Agility časomiera - Tessa Timer

Interface DHCP Relay Sever Table Enter the following commands to configure the DHCP relay server table. System Name(config)# dhcp System Name(config-dhcp)# dhcp-relay System Name(config-dhcp-relay)# server-table System Name(config-dhcp-relay-server)# rowadd 0 entry-status System Name(config-dhcp-relay-server)# rowadd 0 ipaddress 10.0.0.1 System Name(config-dhcp-relay-server)# rowadd 0 entry-status System Name(config-dhcp-relay-server)#exit System Name(config-dhcp-relay)#exit System Name(config-dhcp)#exit... Page 25 Command Line Interface 1.5.4.3 Ethernet Enter the following commands to configure the Ethernet parameters: System Name(config)# ethernet System Name(config-ether)#? Possible completions: exit Exits Back to Global Configure Mode inactivity-timer Configure Ethernet Inactivity Timer rowedit Enter row number to edit System Name(config-ether)# inactivity-timer 450 System Name(config-ether)# rowedit 1 txmodeandspeed 1 System Name(config-ether)#exit System Name(config)#exit... Page 26 Command Line Interface System Name (config)# wireless System Name (config-wireless)# properties System Name (config-wireless-properties)#radio 1 antenna-gain 12 System Name (config-wireless-properties)#radio 1 auto-channel-selection disable System Name (config-wireless-properties)#radio 1 cellsize large System Name (config-wireless-properties)#radio 1 channel-wait-time 60 System Name (config-wireless-properties)#radio 1 configured-channel 160 System Name (config-wireless-properties)#radio 1 current-bandwidth 20 System Name (config-wireless-properties)#radio 1 mp-operational-mode highthroughput System Name (config-wireless-properties)#radio 1 radio-status enable... Page 27 Command Line Interface System Name (config)# wireless System Name (config-wireless)# mimo System Name (config-wireless- mimo)#radio 1 ampdu-status enable System Name (config-wireless- mimo)#radio 1 frequency-extension upper Frequency extension is configurable only if channel bandwidth is 40MHz System Name (config-wireless- mimo)#radio 1 guard-interval fullgi-800nsec System Name (config-wireless- mimo)#radio 1 rx-antennas 7 System Name (config-wireless- mimo)#radio 1 data-streams 1 System Name (config-wireless- mimo)#radio 1 tx-antennas 7... Page 28 Command Line Interface System Name(config)# wireless System Name(config-wireless)# worp System Name(config-wireless-worp)# radio 1 bandwidth-limit-type policing System Name(config-wireless-worp)# radio 1 input-bandwidth-limit 307200 System Name(config-wireless-worp)# radio 1 mac-acl disable System Name(config-wireless-worp)# radio 1 max-sus 1 System Name(config-wireless-worp)# radio 1 worp-mtu 3836 System Name(config-wireless-worp)# radio 1 multi-frame-burst enable System Name(config-wireless-worp)# radio 1 network-name OR_WORP... Page 29 Command Line Interface Wireless Inactivity Timer Enter the following command to configure the Wireless inactivity timer. System Name(config)# wireless Possible completions: mimo mimo Configuration exit Exits Back to Global Configure Mode properties Properties Configuration wireless-timer Wireless Inactivity Timer Configuration worp Worp Configuration System Name(config-wireless)# wireless-timer 5 Note: Setting the Wireless Inactivity Timer to 0 disables the timer. Page 30 Command Line Interface Security Radius Supported Table Enter the following command to configure the Security Radius Supported table entries. Example System Name(config)# radius System Name(config-rad)#supported-table System Name(config-rad-supported)# rowedit 1 entry-status enable System Name(config-rad-supported)# rowedit 1 max-retransmissions 3 System Name(config-rad-supported)# rowedit 1 mes-response-time 3 System Name(config-rad-supported)# rowedit 1 re-authentication 0 System Name(config-rad-supported)# rowedit 1 profile-name defaultradius System Name(config-rad-supported)#exit... Page. System Timer DOWNLOAD NOW 2,110 downloads so far. System Timer Pc timer Time counter Timer Counter Count Uptime. DOWNLOAD System Timer 4.0 for

Agility Wireless Timer System - Agility Časomiera - Tessa Timer

First, second and third ways singularly or in combination. In selection of the first, second and third tone generators, the OS or associated program may automatically check the system configuration to recognize available ones of the tone generators so as to assign the created performance event to the available tone generators. Alternatively, the user may manually select and set desired ones of the various tone generators to be used for the tone generation. Actually, the selection or combination of the first, second and third ways of the tone generation is effected by changing the mixing coefficient MXCOEF to control the data mixer 23. Next, detailed description is given for the OS process executed at step S11 of the main routine in conjunction with a flowchart of FIG. 7. In the OS process, the system timer 2 is restarted at step S110 by setting a predetermined time interval TIM into the system timer 2. As described before, the system timer 2 is provided to monitor and manage the processing states of the OS and the applications. The time interval TIM is predetermined such that the routine returns to the OS process within TIM as long as the MPU 1 normally and periodically conducts the processes. Namely, as described in conjunction with FIG. 6, the system timer 2 is reset or restarted everytime the processes returns to the OS so that the system timer 2 never yields timeup as far as the MPU 1 normally carries out the processes. However, when the MPU 1 accidentally runs away during the course of the operation of the OS or the application so that the processes fail to return to the OS, the system timer 2 does not restart and yields the timeup when the timer interval TIM is counted out after the last restart of the system timer 2. Upon the timeup of the system timer 2, the exclusive and compulsive NMI is issued to the MPU 1 so that the MPU 1 outputs to the tone generator 11 the control signal SWCONT effective to shift the switch 25 from the DAC 24 to

Agility Wireless Timer System - Agility asomiera - Tessa Timer

Skip to main content This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Interrupt Time Article07/09/2024 In this article -->Interrupt time is the amount of time since the system was last started, in 100-nanosecond intervals. The interrupt-time count begins at zero when the system starts and is incremented at each clock interrupt by the length of a clock tick. The exact length of a clock tick depends on underlying hardware and can vary between systems.Unlike system time, the interrupt-time count is not subject to adjustments by users or the Windows time service, making it a better choice for measuring short durations. Applications that require greater precision than the interrupt-time count should use a high-resolution timer. Use the QueryPerformanceFrequency function to retrieve the frequency of the high-resolution timer and the QueryPerformanceCounter function to retrieve the counter's value.The QueryInterruptTime, QueryInterruptTimePrecise, QueryUnbiasedInterruptTime, and QueryUnbiasedInterruptTimePrecise functions can be used to retrieve the interrupt-time count. Unbiased interrupt-time means that only time that the system is in the working state is counted—therefore, the interrupt-time count is not "biased" by time the system spends in sleep or hibernation.Windows Server 2008, Windows Vista, Windows Server 2003 and Windows XP/2000: The QueryUnbiasedInterruptTime function is available starting with Windows 7 and Windows Server 2008 R2.The timer resolution set by the timeBeginPeriod and timeEndPeriod functions affects the resolution of the QueryInterruptTime and QueryUnbiasedInterruptTime functions. However, increasing the timer resolution is not recommended because it can reduce overall system performance and increase power consumption by preventing the processor from entering power-saving states. Instead, applications should use a high-resolution timer.The following example shows how to retrieve the interrupt-time count by calling the QueryInterruptTime, QueryInterruptTimePrecise, QueryUnbiasedInterruptTime, and QueryUnbiasedInterruptTimePrecise functions. Link to the OneCore.lib library when you build a console application that calls these functions.#include "stdafx.h"#include #include void InterruptTimeTest(){ ULONGLONG InterruptTime; ULONGLONG PreciseInterruptTime; ULONGLONG UnbiasedInterruptTime; ULONGLONG PreciseUnbiasedInterruptTime; // The interrupt time that QueryInterruptTime reports is based on the // latest tick of the system clock timer. The system clock timer is // the hardware timer that periodically generates interrupts for the // system clock. The uniform period between system clock timer // interrupts is referred to as a system clock tick, and is typically // in the range of 0.5 milliseconds to 15.625 milliseconds, depending // on the hardware platform. The interrupt time value retrieved by // QueryInterruptTime is accurate within a system clock tick. QueryInterruptTime(&InterruptTime); printf("Interrupt time: %.7f seconds\n", (double)InterruptTime/(double)10000000); // Precise interrupt time is more precise than the interrupt time that // QueryInterruptTime reports because the functions that report // precise interrupt time read the timer hardware directly. QueryInterruptTimePrecise(&PreciseInterruptTime); printf("Precise interrupt time: %.7f seconds\n", (double)PreciseInterruptTime/(double)10000000); // Unbiased interrupt time means. System Timer DOWNLOAD NOW 2,110 downloads so far. System Timer Pc timer Time counter Timer Counter Count Uptime. DOWNLOAD System Timer 4.0 for

Boiler Control Systems by Heat-Timer - Heat-Timer Corporation

Process of step S11 after any one of steps S13, S14 and S15 is finished so as to again carry out the restart process of the system timer 2 and the system management process. the main routine is cyclicly executed. the system timer 2 is periodically restarted or retriggered within each period of the preset time by the OS process at step S11. Namely, the MPU 1 is never interrupted by the NMI. sample data of the musical tone waveforms is synthesized by various ways. the software tone generator module may be operated by executing the tone generation program to synthesize the waveform sample data. the hardware tone generator device composed of an LSI chip or DSP may be operated to synthesize the waveform sample data. an external tone generator is operated to synthesize the waveform sample data by feeding MIDI event data to the external tone generator and by controlling the same. the tone generation process selectively utilizes the first, second and third ways singularly or in combination. the OS or associated program may automatically check the system configuration to recognize available ones of the tone generators so as to assign the created performance event to the available tone generators. the user may manually select and set desired ones of the various tone generators to be used for the tone generation. the selection or combination of the first, second and third ways of the tone generation is effected by changing the mixing coefficient MXCOEF to control the data mixer 23. the system timer 2 is restarted at step S110 by setting a predetermined time interval TIM into the system timer 2. the system timer 2 is provided to monitor and manage the processing states of the OS and the applications. the time interval TIM is predetermined such that the routine returns to the OS process within TIM as long as the MPU 1 normally and periodically conducts the processes. the system timer 2 is reset or restarted everytime the processes returns to the OS so that the system timer 2 never yields timeup as far as the MPU 1