User`s manual

Hmode instructs the enabler to enable the RTS-CTS modem control handshake on
the RS-422/485 port. When modem control handshaking in enabled, the
16C750 UART’s RTS and CTS signals are connected to the RS-422/485
auxiliary channel. The auxiliary channel may then be used for handshaking
between the DSP-200/300’s RS-422/485 port and a peripheral device. When
modem control handshaking is disabled, the RTS and CTS signals from the
16C750 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 .
TCLK/RCLK Clockingh2
RTS/CTS Handshakingh1
Loopback Allh0
Auxiliary Channel Option
Figure 1. DOS Enabler Auxiliary Channel Options.
Before removing a DSP-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
DSP-200/300. When the 'R' option is used, any settings specified by the 'B',
'I', 'O', and 'H' options are ignored.
2.2.1.1 Example 1
DSP230EN.EXE
In example 1, no command line argument is specified. The Enabler will report an error
and display the proper usage of the command.
2.2.1.2 Example 2
DSP230EN.EXE (s0,b300,i5)
In example 2, the Enabler will configure the DSP-200/300 in socket 0 with a base
address of 300H and IRQ 5 using a configuration memory window at segment D000.
The DSP-200/300 unit's RS-422/485 output drivers will always be enabled, and
RTS-CTS modem control handshaking will be disabled.
2.2.1.3 Example 3
DSP230EN.EXE (i10,h,b340,s1)
DOS/Windows 3.x 2-14
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