This user manual describes the features and characteristics of the Rev.A+ system board.
This manual covers the essential procedures for setting up the ULTRA system board, including layout identification, CPU installation, and jumper configuration. Safety instructions emphasize powering off the system before any hardware changes and proper handling of batteries and peripheral devices.
The document also includes FCC compliance information, details on clearing the CMOS, selecting the front‑side bus, and limits for joystick/MIDI current draw. It serves as a reference for both initial assembly and later maintenance of the board.
Yes. The manual states you must switch off the power supply or unplug the AC cord before installing or removing any component.
Replacing the battery incorrectly can cause an explosion; only replace it with the same or an equivalent type recommended by the manufacturer.