User`s manual

Hmode instructs the client driver 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 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 Client Auxiliary Channel Options.
2.1.2.1 Example 1
DEVICE = C:\DSP-200\ DSP230CL.SYS
In example 1, no command line arguments are specified. The Client Driver will
configure a DSP-200/300 inserted into any socket with a base address and IRQ
assigned by Card and Socket Services. The DSP-200/300 RS-422/485 output drivers
will always be enabled, and RTS-CTS modem control handshaking will be disabled.
2.1.2.2 Example 2
DEVICE = C:\DSP-200\DSP230CL.SYS (b290,i11)
In example 2, a single command line argument is provided. The Client Driver will
attempt to configure a DSP-200/300 inserted into any socket with a base address of
290H and IRQ 11. If address 290H or IRQ 11 is unavailable, the DSP-200/300 will not
be configured. If the Client Driver can successfully configure the DSP-200/300unit, the
RS-422/485 output drivers will always be enabled, and RTS-CTS modem control
handshaking will be disabled.
2.1.2.3 Example 3
DEVICE = C:\DSP-200\DSP230CL.SYS(s0,b300,i5,o2)
In example 3, a single command line argument is provided. The Client Driver will
attempt to configure a DSP-200/300 inserted into socket 0 with a base address of 300H
and IRQ 5. If address 300H or IRQ 5 is unavailable, the DSP-200/300 will not be
DOS/Windows 3.x 2-6
www.bb-elec.com [e-mail] [e-mail]
International Office: 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax [phone]
European Office: Westlink Commercial Park Oranmore Co. Galway Ireland [phone] Fax [phone]