This interrupt is the first choice that most sound cards make when looking for an IRQ setting.
What is the standard IRQ setting for a math coprocessor?
1+8+5+4+5+5-5-5-5-5-5-5-5-5-5 = -17
50 50 25 25 25 25 20 x .05 50 25 25 50 25 5 5 5 5 5 50 5 5 5 5 5 5 5 5 5 5 25 25 25 5 5 5 5 5 25 25 5 5 5 5 5 5 5 5 5 5 25 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
0: (5x5)-(5x5) 1: (5:5)+5-5 2: (5:5)+(5:5) 3: (5+5+5):5 4: [(5x5)-5]:5 5: [(5-5)x5]+5 6: [(5x5)+5]:5 7: [(5+5):5]+5 10: 5+5+5-5 11: (5:5)+5+5 15: (5x5)-5-5 20: 5+5+5+5 24: (5x5)-(5:5) 25: (5x5)+5-5 26: (5x5)+(5:5) 30: [(5:5)+5]x5 35: (5x5)+5+5 45: [(5+5)x5]-5 50: (5x5)+(5x5) 55: [(5+5)x5]+5 75: (5+5+5)x5 120: (5x5x5)-5 130: (5x5x5)+5 625: 5x5x5x5
Here is one answer:((5+5)/5 )^5 +5Details:((5+5)/5 )^5 +5= ((10)/5 )^5 +5= 2^5 +5= 32 + 5= 37Another answer:(5*5)+(5!/(5+5))Details:(5*5)+(5!/(5+5))=25 + (5!/10)=25 + (120/10)=25 + 12=37
LTP1 should use IRQ7.
5
5
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
By default, the IRQ for the floppy disk controller is IRQ 6.
By default IRQ 7 is assigned to LPT1.
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
IRQ 1 is used exclusively for the keyboard controller.
IRQ 1
The default IRQ for COM2 is typically 3, while for COM4, it is usually 5. These IRQ settings allow the operating system to manage hardware interrupts for the respective serial ports. However, these values can sometimes vary based on the system configuration and settings in the BIOS. Always check your specific system documentation for accurate IRQ assignments.
IRQ 5 is normally a free interrupt unless you have a second parallel port installed. If the interrupt is currently in use by another resource, you could reassign the IRQ that one of the conflicting resources is using to a less commonly used interrupt such as 10, 11, or 12.
IRQ Ports 2 & 9 -Taylor