Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
Nodes       : 3010
Index Size  : 93790
HCP-Version : 5
Compiled on : Atari
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View Ref-File3.1.11  Mediach                                                    TOS

 Name:         Media change

 Opcode:       9

 Syntax:       int32_t Mediach ( int16_t dev );

 Description:  The BIOS routine Mediach establishes whether the data- 
               carrier 'medium' on the device dev has been changed 
               since the last disk operation of the particular drive. 
               Valid are:

                dev = 0  (Drive A) 
                    = 1  (Drive B) 
                    = 2  (Drive C, similarly for other drives) 

               Note: One should never assume that a device's medium 
               cannot be exchanged (removable disk catridge, CD-ROM, 
               floppy drive, floptical ...). The recognition of a 
               floppy disk change usually only works reliably if the 
               floppy is not write-protected. In addition one should 
               note that during formatting a floppy different serial 
               numbers will be asssigned.

 Return value: The function returns an integer-value with the 
               following meaning:

                Value  Meaning 
                  0    Media definitely has not changed. 
                  1    Media might have changed. 
                  2    Media definitely has changed. 

 Availability: All TOS versions.

 See also:     Binding   Flopfmt   Protobt