IRQ TABLE
| 00 | System Timer (a clock funtion) |
| 01 | Keyboard (USB can replace) |
| 02 | Programmable Interrupt Controller (motherboard component) |
| 03 | Modem (USB can replace) |
| 04 | COM1 (USB can replace) |
| 05 | Soundcard codec |
| 06 | Floppy |
| 07 | Printer |
| 08 | CMOS (motherboard) |
| 09 | Soundcard (midi) |
| 10 | IRQ holder |
| 11 | Video card |
| 12 | IRQ holder |
| 13 | NPU- (number cruncher) |
| 14 | Hard Disk |
| 15 | Hard Disk (secondary) |
TOTAL INTERRUPTS THAT COULD BE SAVED BY USING USB: 3
TOTAL NEW USB PRODUCTS THAT CAN BE EXPANDED: More than 175 peripherals
As soon as the IRQs that were held was released other cards quit working.
As you can see real-estate in the PC is very limited using the old method.
The only way to eliminate these head-aches - USB.
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