User`s manual

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5. How large FIFO length I should set?
A: FIFO (First-in-First-out) buffers are used to reduce the frequency of interrupt
processes for UART chips. The size of the buffer will determines the
number of times the cards need to interrupt the computer’s CPU in order to
process a string of data. With larger FIFO buffer size; there is more data
flow and less interruption to the CPU, therefore allowing the CPU to be free
to handle other more crucial tasks.
Set the Receive/Transmit Buffer to higher value will get faster performance
because the interrupts will be reduced, but the time for interrupt service
routine will become shorter. The receive buffer overflow will be easily
happened if the CPU speed is not enough to handle. If the system is not
stable, select the lower value to correct problems.
6. How come my parallel device can not work on this Card, but work
properly under on-board LPT port??
A: a. Please confirms your parallel device connect to the LPT port correctly.
b. Make sure the LPT port number you connected matches with parallel
device settings.
c. Your parallel device only works under 278/378 legacy ISA IO address.
This card can not satisfy with this feature. Please contact with your
parallel device vendor for driver updating.
7. How can I set the different ECP / EPP / SPP / BPP operation mode?
A: Under Windows OS such as 2000, XP, Vista, and 7, PCI parallel card will
automatically communicate with the device to which it is connected and
sets to that particular mode. For example if this card is connected to a
printer that support SPP mode, then this parallel card will communicate with
this printer and will automatically set to SPP mode. It means that this card
will handshake with the device to which it is connected and configures to
that mode. User does not require changing to any particular mode. This
parallel card’s working mode can not force setting particular mode by driver
or BIOS!!