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CLKDVR.SYS Causes Lockups When Saving To Inva
DocumentID: 607642
Revision Date: 29-Feb-96 1:32:29 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Symptoms: A customer receives the error "Invalid Drive/Path Specification" and his computer locks when he tries to save a file to an invalid directory. Solutions: The customer removed the CLKDVR.SYS command from his CONFIG.SYS file, and the problem was resolved.

The CLKDVR.SYS is a driver that was used on some early XT systems that had a battery-operated system clock. XTs, however, were not designed to read these clocks, so the code in the clock had to be exported to the standard system clock. This driver was shipped with the DOS that came with the system. Without the driver, you had to set the time and date, whereas if the driver was used, the time/date were set automatically when the computer booted up.

There are probably some XT clock cards that use a driver like this as well, possibly with the same name. Most clock cards used a program called SETCLOCK or SETCLK to read the time into the system clock and this saved the need for a resident driver or TSR. The CLKDVR.SYS cannot be bought separately. It is normally found on old XTs or machines that have been upgraded from an old XT.

Status:      Third-Party Product
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