| A | B |
|---|
| IRQ 0 | System timer |
| IRQ 1 | Keyboard |
| IRQ 3 | COM 2 and COM 4 ports |
| IRQ 4 | COM 1 and COM 3 ports |
| IRQ 5 | Parallel port 2 or Sound Card or Network Card |
| IRQ 6 | Floppy Disk Controller |
| when a devices wants to tell the CPU that they have some information available that is ready for transfer | an interrupt request (IRQ) |
| Direct Memory Access (DMA) channels allow devices to | bypass the processor and directly access the computer memory. |
| An I/O port number is a memory address where data is | temporarily stored as it moves in and out of the devices. |
| I/O Port Address 000-00F, 081-09F | Direct Memory Access controller |
| I/O Port Address 060-060, 064-064 | Keyboard |
| I/O Port Address 130-14F | SCSI host adapter |
| I/O Port Address 278-27F | LPT2 or LPT3 |
| I/O Port Address 2E8-2EF | Com 4 serial port |
| I/O Port Address 3F0-3F7 | Floppy disk controller |
| For the disk controllers, always remember that a colored stripe | on the data cable is pin-1. |
| The ROM BIOS and CMOS chip contain the | software that sets and records the master configuration for all components in the system, including those on the motherboard and the logic chip sets. |
| Multi-tasking | more than one application running at the same time |
| ARPAnet | joint project responsible for starting the Internet |
| The floppy drive exchanges data with the motherboard devices, including the microprocessor, via a | 34-pin flat ribbon (data) cable |
| When installing a floppy drive lining the red-stripe edge with | pin-1 of the drive connector or drive controller interface assures a correct alignment. |
| an IDE cable typically has 40 pins and can also have | the hard drive and the CD-ROM attached to it |
| POST | At start up, a series of tests are automatically performed to check the primary components in the system, such as the CPU, ROM, memory, and motherboard support circuitry |
| If the computer has a dual boot between Win 98 and Win 2000 Professional in order to read files in both partitions the | file system must be FAT rather than NTFS |
| DOS file required to boot | io.sys, command.com, msdos.sys |
| IRQs currently supported range from | 0 to 15 for a total of 16 IRQs |
| Post error codes take the form of a . | series of beeps that identify a faulty hardware component |
| If everything has been installed correctly during the assembly process and the new system is functioning normally, | one short beep will usually be heard at the completion of POST. |
| Maximum length of a parallel cable | fifteen feet |
| In Windows 9x, Config.sys is mostly needed for the | installation of real-mode device drivers for those devices that may not be supported by Windows 9x's (32-bit) device drivers |
