ID Number: Q42461
5.00 5.10 6.00 6.00a 6.00ax 7.00
MS-DOS
Summary:
In Microsoft C versions 5.0, 5.1, 6.0, 6.0a, 6.0ax, and C/C++ version
7.0, the run-time function _dos_setdrive() takes two arguments, as
follows:
void _dos_setdrive( unsigned drive, unsigned *numdrives)
The "numdrives" argument receives the number of possible drives in the
system. With MS-DOS versions 1.x and 2.x, this value is 2, since two
logical drives (A and B) are supported on a single floppy-disk drive.
With MS-DOS 3.0 or greater, the value returned is 5 or the number set
with LASTDRIVE in the CONFIG.SYS, whichever is greater.
This information is returned from interrupt 21h, function 0Eh.
Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00