Multi-Tech Systems ISIHP-2U - Manual (Page 67)

Software/Driver Installation
MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD 67
Removing the Driver (SCO Open Server 5)
To remove the Multi-Tech Serial Card Driver, enter the configuration
utility (e.g., custom for SCO Open Server 5) and follow instructions to
remove the entire driver and rebuild the kernel without the ISI driver.
If it is necessary to reinstall the driver due to I/O address or IRQ
overlap, remove the driver first.
Note: Remove the driver before permanently removing the ISI card from the
computer.