Quatech RS-232 asynchronous serial
PCMCIA cards are an ideal solution for adding additional ports to a wide variety
of portable systems. Because they share electronic fundamentals with native bus
architectures such as PCI and ISA, they function exactly like standard COM ports
and can be addressed as such by most application software. In addition, their
small size and the fact that the card itself can be left inside the computer at
all times, make them practical choices for the most ported portable systems.
Quatech RS-232 serial PCMCIA cards
are designed to provide maximum performance while taking up minimal system
resources. For high performance is heavy multitasking environments, the cards
are implemented with 16750 UART's containing 64-byte FIFO's. This along with
Quatech's special clock-multiplying feature enables data transfer rates as high
as 921.6 kbps. (4-port cards still use 16550 UART's for standard 115.2 kbps
speeds, but are due for an upgrade soon.) The cards also conserve system
resources with their low power requirements that maximized battery life. They
also have selectable and shareable interrupts, further extending a portable or
handheld system's limited resources. And their multi-platform operating support
makes them the single practical choice for a diverse fleet of portable systems.
