##### Other Function - BootROM Service Function

# syBtCheckDisc

Distinguishes disc types

### FORMAT

`

  Sint32 syBtCheckDisc( Void )

`

### PARAMETER

  None

### RETURN

  Negative value | Checking |
  0 | Dreamcast disc |
  Positive value | Other than Dreamcast disc |

### DESCRIPTION

  Checks the type of disc inserted in the disc tray.

### NOTE

  This function operates only in boot ROM version 0.972 and later. In boot ROM versions earlier than version 0.972, this function always returns a "0", and normal internal operation will be disrupted. This function should not be called more than once per 1Vsync.

syBtCheckDisc

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