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IRQs 3 is reserved for the COM1 port.

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15y ago

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What is the address of COM1?

From: http://www.techadvice.com/tech/C/ComPort_TS.htmCom1, IRQ 4, address: 3F8Com2, IRQ 3, address: 2F8Com3, IRQ 4, address: 3E8Com4, IRQ 3, address: 2E8


What is the IRQ for a keyboard?

IRQ 1 is used exclusively for the keyboard controller.


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.


What IRQ is used by the mouse?

i dont know the answer


What IRQ is used by moused?

i dont know the answer


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 system resources does COM2 use?

IRQ 3


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


IRQ address typically used for LPT2?

5


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.


What IRQ does LPT1 usually use?

LTP1 should use IRQ7.


Which interrupt is usually used for the System Timer?

IRQ 0