CTI Products HIB-232 Serial Interface - Manual (Page 14)

HIB Hardware Reference Device Driver Installation
CTI Products, Inc.
68-10855-210
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For example, if your mouse is using COM1 and IRQ4, and you want the
HIB connected to COM3, you will need to change the IRQ number used
by the device driver (possibly to 5) so that the device driver’s interrupt will
not conflict with the mouse’s interrupt.
NOTE: System operation can become very slow or may be inoperable if
the interrupt used by CTIHIB.SYS is also used by another device in your
PC.
Warning -- COM Port Conflicts
1. Be sure to use a COM port that is different from your
serial mouse port or other device.
2.
The PC COM1 port shares an interrupt with COM3.
COM2 shares an interrupt with COM4. You may have
problems using COM1 and COM3 at the same time. The same
holds for COM2 and COM4.
If your mouse or other serial device is on COM1, use COM2 or
COM4 for the device driver.
If your mouse or other serial device is on COM2, use COM1 or
COM3 for the device driver.
/Wnnn Transmit Character Delay
This option is rarely used. This option adds a delay of <nnn>
microseconds between each character transmitted by the COM port. This
option is used to slow down the rate at which characters are sent because
some PC COM ports are not able to keep up with the device driver’s
transmission speed.
7.1 CTIHIB.SYS Versions
The old version of CTIHIB.SYS (dated 11/20/96) had a timing issue with NT,
2000, and XP. The new version of this file dated 4/30/02 or later solves this
problem.