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DMA Channels and Devices

Written by The Geekette on January 25, 2010 – 3:00 pm
Posted in Hardware, Windows | Comments Off

DMA Channel

Devices commonly assigned

0 Assigned internal to the system board – Should not be usable.
1 No specific assignment / usually used for sound cards, or SCSI host adapters.
2 Assigned to diskette drives.
3 No specific assignment /  common choice for sound cards, network interface cards, or SCSI host adapters.
4 No specific assignment
5 No specific assignment / Sound Blaster-type cards generally use this DMA channel
6 No specific assignment
7 No specific assignment

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Potential IRQ Conflicts

Written by The Geekette on January 25, 2010 – 2:45 pm
Posted in Hardware, Windows | No Comments »
IRQ

Devices used and potential conflicts

0 This IRQ is used within the system board for system timing. If a conflict arises with this IRQ chances are the system board is bad, use a diagnostic program to determine if this is the case.
1 This IRQ is assigned to the keyboard. Its never available to other add-in cards. Again if this is the problem, its most likely a problem with the system board.
2 This IRQ was assigned to older EGA video cards. Beware, IRQ 9 uses IRQ to communicate with the CPU, therefore this IRQ should only be used under extreme circumstances.
3 This IRQ is assigned to the serial ports: COM 2, and COM 4. Avoid setting other devices to this IRQ since mice, modems, and other devices are set to use this IRQ.

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