Entry
R0 = 0 to return track range, or a valid track number
R1 = pointer to 5 byte block
R7 = pointer to CDFS control block
Exit
R0, R1, R7 preserved
This call returns the track range of a CD, or information on a specified track. The information is returned in the block pointed to by R1.
If R0 = 0 on entry, the track range is returned in the block as follows :
Byte Contents
0 First track on CD (1-99)
1 Last track on CD (1-99)
2-4 Corrupted
Track numbers do not necessarily start at 1.
If R0 is a valid track number on entry, then information about that track is returned in the block :
Byte Contents
0-3 Logical block address of track start (ie Mode 0 address)
4 Audio control bits specifying the type of information the track holds :
Bits Meaning
0 0 -> audio information, 1 -> data information
1 0 -> 4 channel sound, 1 -> 2 channel sound
2-7 Reserved
[sh-index] Back to list of manuals
|
| |
