Functions
In addition to playing games, the PlayStation has the ability to read and play audio CDs. The CD player has the ability to shuffle the playback order, play the songs in a programmed order, and repeat one song or the entire disk. This function, as well as a memory card manager, can be accessed by starting the console either without inserting a game or keeping the CD tray open, thereby accessing a GUI for the PlayStation BIOS. The actual GUI for both PSone and PlayStation differ graphically depending on firmware versions. If the CD lid is closed with a game inside at any time while at the menu, the game will immediately start.
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