Technical information

SEGA Confidential
8
Service Program Information
System Programs
The services below can be used by the application. These service programs must be
used when performing these tasks.
• Setting up and referencing the interrupt processing routine.
• Setting, referencing, and modifying the SCU Interrupt mask status.
• Simple semaphoring.
• System clock change
• SCU interrupt routine priority change.
• CD Multiplayer execution.
• Power-on memory initialization.
For more information, see the System Program User’s Manual of the SATURN System
Library User’s Guide (ST-162-R1).
Backup Library
A search and read/write functions to a backup memory device are provided by the
Backup Library. This library must be used when accessing the internal backup
RAM. (Currently, the library must also be used to access external backup RAM
devices. Additional libraries will be distributed by SEGA for accessing external
memory devices that may be released in the future.)
For more information see the Backup Library User’s Manual of the SATURN System
Library User’s Guide (ST-162-R1).
Executing the Multiplayer
When the Multiplayer is started, user-interface function buttons are displayed on the
screen. Operation of the Multiplayer is done with a SEGA SATURN input periph-
eral, such as the standard SEGA SATURN Control Pad.
How to Operate the Control Pad
The functions of each button on the Control Pad are explained below. The X, Y, Z,
LEFT, and RIGHT buttons are used to control the playback of music CDs.
• D-Pad: Highlight and Move cursor
• Start button: Start the game
• A button: Select
• B button: Cancel
• C button: Select
• X button: Repeat one song
• Y button: Stop
• Z button: Play / Pause
• LEFT: Skip backward (song skip & search)
• RIGHT: Skip forward (song skip & search)
Note: To skip one song, briefly press LEFT or RIGHT on the Control Pad. To perform a search,
press and hold down LEFT or RIGHT on the Control Pad.