Tomcat i7230A S5160 
                                                                  Chapter 3: BIOS Setup 
ECP uses the DMA protocol to achieve data transfer rates of up to 2.5 Mb/s and provides 
symmetric bidirectional communication. On the other hand, EPP uses existing parallel port 
signals to provide asymmetric bidirectional communication. 
Generally, because of its FIFOs and the DMA channel it uses, ECP is good for large data 
transfers (useful for scanners and printers). On the other hand, EPP is better with links that 
switch directions frequently (like parallel port drives). 
SPP / EPP / ECP 
Base I/O Address / Interrupt 
This determines the base address and interrupt of the parallel port. 
378 / IRQ7 / Disabled / 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. 
Enabled / Disabled 
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