Purpose

Change boot drive number kept by the kernel to allow a change in the assignment of boot drive as seen by later processes.

Calling Sequence

int far pascal MFSH_SETBOOTDRIVE(usDrive)
 
unsigned short usDrive;

Where

usDrive contains the 0-based drive number that the mini-FSD wants the system to consider as the boot drive.

Returns

If no error is detected, a zero error code is returned. If an error is detected, on of the following error codes is returned:

• ERROR_INVALID_PARAMETER – the supplied drive number is invalid.

Remarks

This call changes the boot drive number that is kept in the global info segment of the system. Valid values range from 2 (=C) to 25 (=Z). This function must be called during the call to MFS_INIT to update the info segment correctly. This is routine should be used by RIPL mini-FSDs.