Tiger i7320 / Tiger i7320R Chapter 3: BIOS Setup
3-16
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Base I/O Address / Interrupt:
This determines the base address and interrupt of the parallel port.
Disabled /
378/IRQ7 /
278/IRQ5 / 3BC/IRQ7
DMA Channel
This BIOS feature determines which DMA channel the parallel port should use when it is in
ECP mode.
The ECP mode uses the DMA protocol to achieve data transfer rates of up to 2.5 Mbits/s and
provides symmetric bidirectional communications. For all this, it requires the use of a DMA
channel.
By default, the parallel port uses DMA Channel 3 when it is in ECP mode. This works fine in
most situations.
This feature is provided just in case one of your add-on cards requires the use of DMA
Channel 3. In such a case, you can use this BIOS feature to force the parallel port to use the
alternate DMA Channel 1.
Please note that there is no performance advantage in choosing DMA Channel 3 over DMA
Channel 1 or vice versa. As long as either Channel 3 or Channel 1 is available for your parallel
port to use, the parallel port will be able to function properly in ECP mode.
DMA 1
/ DMA 3
Floppy Disk Controller
This defines how the floppy disk controller is detected and configured.
•
Disabled
•
Enabled
