0: STATUS

No parameters. No-op just to read the status.

1: STOP ALL

No parameters. Stops CDDA playback, disk spin, and sets drive in data mode.

2: TOC COMMAND

Nibble D is the sub-command code:

0: GET POSITION

MSF in status will be the current position from the beginning of the CD (absolute).

1: GET TRACK POSITION

MSF in status will be the current position from the beginning of the track (relative).

2: GET TRACK NUMBER

Minutes in status will be the current track.

3: GET CD LENGTH

MSF in status will be the total CD length.

4: GET FIRST AND LAST TRACKS

Minutes in status will be the first track (normally 1), seconds will be the last.

5: GET TRACK MSF

MSF in status will be the start of the desired track (nibbles E and F). If the track is a data track, the frames upper digit's 4th bit will be 1.

3: PLAY

B: Minutes high digit
C: Minutes low digit
D: Seconds high digit
E: Seconds low digit
F: Frames high digit
G: Frames low digit

Starts playing audio at specified MSF.

4: SEEK

B: Minutes high digit
C: Minutes low digit
D: Seconds high digit
E: Seconds low digit
F: Frames high digit
G: Frames low digit

Sets pickup at specified MSF.

6: PAUSE

Pauses CDDA playback (disk keeps spinning).

7: RESUME

Resumes CDDA playback after pause.

8: FAST-FORWARD

Unknown.

9: REWIND

Unknown.

10: INIT

Sets pickup at CD lead-in ?

12: CLOSE

Closes the tray on the front-loading NeoGeo CD.

13: OPEN

Opens the tray.

CD drive commands

Contents