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What else can I help you with?
What IRQ does the system timer use?
0
What system resources does com1 use com2 com2 com3 com4?
COM1-IRQ 4, memory addresses 03F8-03FF COM2-IRQ 3, memory addresses 02F8-02FF COM3-IRQ 4, memory addresses 03E8-03EF COM4-IRQ 3, memory addresses 02E8-02EF pg. 396
What IRQ does COM2 use?
COM2 typically uses IRQ 3. The Interrupt Request (IRQ) is a signal used by hardware devices to get the attention of the CPU. In the case of COM2, which is a communication port, it uses IRQ 3 to communicate with the CPU for data transmission and reception.
Which two IRQ settings are connected together?
IRQ Ports 2 & 9 -Taylor
How does IRQ priority works?
An IRQ is an electrical signal generated by a device needing attention. Usually, it means that some event has occurred such as data being received and ready to use. The IRQ signal is sometimes connected directly to the processor or in some cases to a dedicated interrupt handling circuit. When the processor is told the interrupt has happened it calls the ISR to handle it. The ISR is software that deals with the needs of the device that requested it. Usually, the device is read or some system action is taken to clear the condition that caused the IRQ then the interupt system is reset to make it ready for use again. On most systems, the IRQ signal forces the processor to save it's current program counter so it knows where to return when the ISR is finished, then it jumps to a hard-wired address called the Interrupt Vector where the code for the ISR is placed. At the end of the ISR, the program counter is restored and the program carries on from where it was before the interrupt paused it. Antonio Holl
What is the Interrupt Request IRQ assigned to LPT1?
By default IRQ 7 is assigned to LPT1.
What IRQ does LPT2 usually use?
5
List interrupts used with the IBM PC type sytems?
IRQ 0 - System timer. IRQ 1 - Keyboard. IRQ 2 - Cascaded signals from IRQs 8-15. IRQ 3 - COM2 (Default) and COM4 (User) serial ports IRQ 4 - COM1 (Default) and COM3 (User) serial ports IRQ 5 - LPT2 Parallel Port 2 or sound card IRQ 6 - Floppy disk controller IRQ 7 - LPT1 Parallel Port 1 or sound card (8-bit Sound Blaster and compatibles) IRQ 8 - Real time clock IRQ 9 - Free / Open interrupt / Available / SCSI. Any devices configured to use IRQ 2 will actually be using IRQ 9. IRQ 10 - Free IRQ 11 - Free IRQ 12 - PS/2 connector Mouse. IRQ 13 - ISA / Math Co-Processor IRQ 14 - Primary IDE. If no Primary IDE this can be changed IRQ 15 - Secondary IDE These are just a set of standard IRQs. For much more detail check our Ralf Brown's list located at http://www.cs.cmu.edu/~ralf/files.html
What is the IRQ for a keyboard?
IRQ 1 is used exclusively for the keyboard controller.
What IRQ does a monitor use?
None. Its the graphics card that uses an IRQ. The monitor is just a peripheral.
Which interrupt is usually used for the System Timer?
IRQ 0
What IRQ does the system timer use?
0
Which interrupts are usually used for the hard disk controller?
IRQ 14
What is the Linux equivalent of LPT1 in MS-DOS?
The Linux equivalent of LPT1 is /dev/lp0.
What system resources does COM2 use?
IRQ 3
If a sound card operates correctly except when a printing operation is in progress what is most likely the problem?
This problem won't be found in any relatively modern computer. On a much older system, it would indicate that the sound card and LPT1 were sharing the same IRQ.
If IRQ 2 is in use IRQ 9 cant be used?
Depends if it's sharable or not. You could try moving the card to another slot.
