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Devices:
cd.device
CD_ADDCHANGEINT
CD_ADDFRAMEINT
CD_ATTENUATE
CD_CHANGENUM
CD_CHANGESTATE
CD_CONFIG
CD_EJECT
CD_GETGEOMETRY
CD_INFO
CD_MOTOR
CD_PAUSE
CD_PLAYLSN
CD_PLAYMSF
CD_PLAYTRACK
CD_PROTSTATUS
CD_QCODELSN
CD_QCODEMSF
CD_READ
CD_READXL
CD_REMCHANGEINT
CD_REMFRAMEINT
CD_SEARCH
CD_SEEK
CD_TOCLSN
CD_TOCMSF
CloseDevice
OpenDevice
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GuruMeditation
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Docs » Autodocs » cd.device » CD_READ
CD_READ -- read data from disk.
Reads data from the CD into memory. Data may be accessed on WORD
boundaries (you are not restricted to sector boundaries as with
normal disk devices). Data lengths can also be described in WORD
amounts.
IO REQUEST INPUT
io_Device preset by the call to OpenDevice()
io_Unit preset by the call to OpenDevice()
io_Command CD_READ
io_Data pointer to the buffer where the data should be put
io_Length number of bytes to read, must be a WORD multiple.
io_Offset byte offset from the start of the disk describing
where to read data from, must be a WORD multiple.
IO REQUEST RESULT
io_Error - 0 for success, or an error code as defined in
<devices/cd.h>
io_Actual - if io_Error is 0, number of bytes actually transferred
If an error occurs when attempting a CD_READ, the software will
retry up to 10 times before giving up on the request. If the
drive is in double-speed and an error occurs, the software will
retry once more in double-speed, and if this fails, will retry
the next 9 times in single-speed.
CD_READXL()
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