User`s manual

AuxIn). The auxiliary channel may then be used for handshaking between a
QSP-200/300 RS-422/485 port and a peripheral device. When modem
control handshaking is disabled, the RTS and CTS signals from the 16C550
UART are looped back to each other. If this option is omitted, the default
setting is RTS-CTS modem control handshake disabled. See the Hardware
Information section for more information.
U instructs the Enabler to disable the QSP-200/300's interrupt status register
and enable the Scratchpad registers of the individual UARTs. This option is
only required in very rare cases where an application program requires
access to the UART's Scratchpad register. If this option is omitted, the
QSP-200/300's interrupt status register is enabled and the UARTs'
Scratchpad registers are disabled.
Before removing a QSP-200/300 from its PCMCIA socket, the Enabler should be
executed to free the system resources allocated when the card was installed. For this
operation the Enabler provides on additional command line option:
R instructs the Enabler to release the resources previously allocated to the
QSP-200/300. When the 'R' option is used, any settings specified by the 'B',
'I', 'U', and 'E' options are ignored. This option must be omitted when
installing a QSP-200/300 into the system.
QSP-200/300 User's Manual 26