14 PCA-6157 User's Manual
Parallel port settings
The PCA-6157 supports an EPP/ECP (Enhanced Parallel Port/
Extended Capabilities Port) parallel port. The EPP/ECP port is much
faster than previous standard ports due to the way information is
passed through the bus and handled by the system. The system
uses DMA (Direct Memory Access) for faster throughput and
lower CPU loading. For this reason you need to configure the
parallel port to handle the correct DMA channel.
DMA request output (JP21)
When the parallel port is operating in the ECP/EPP mode, it utilizes
DMA (Direct Memory Access) for enhanced data transfer. The port
acknowledges and requests data transfers to and from the DMA.
The DMA channels available to the parallel port are DMA chan-
nels 1 and 3. The DMA channel to be used by the port is selectable
by JP21.
DMA 1
DMA 3
JP21
(default)
SCSI Function Select (JP22)*, (JP23)*
Enable
Disable
JP22 (default)
JP23
1
IRQ9 IRQ10
(default)
*PCA-6157L does not support this feature
4
1
1
