User`s guide

BDOS FUNCTION 13: RESET DISK SYSTEM

Entry Parameters:

The Reset Disk System function restores the file system to a reset state where all

the disk drives are set to read-write (see Functions 28 and 29), the default disk is set

to drive A, and the default DMA address is reset to 0080H. This function can be

used, for example, by an application program that requires disk changes during

operation. Function 37, Reset Drive, can also be used for this purpose.

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BDOS Function Calls CP/M 3 Programmers Guide