Error - "Interrupt 31...Invalid Drive"

DocumentID: 620087
Revision Date: 29-Feb-96 1:38:43 PM

The information in this document applies to:
WordPerfect® 6.0 for DOS

Problem

Symptoms: A customer received the error "Interrupt 31 ...Invalid Drive" intermittently while using WP. The customer would like to know if WP looks at the CMOS for information about the hard drive. Solutions: The error message as described by the customer does not match the type of functions for Interrupt 31. Interrupt 31 and all of its subfunctions are for DOS Protected Mode Interface (DPMI) interaction. No function in Interrupt 31 does any type of I/O (input or output). However, the Disk Error 31 may be the error level received. WP does not look at the CMOS chip to provide any information to perform any I/O on the drive. WP uses INT 21h for all I/O operations.

Answer:

Details:

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