Data details

7.2.6 Data type

List

Title Data specifications

Data CD status information

Data Name CdcStat

No 6.1

The CD block status and the CD report are collectively called CD status information.

(1) CD status information …… CDC_GetCurStat, CDC_GetLastStat, CDC_GetPeriStat functions

CdcStat * stat

Access macro	Mold	explanation
CDC_STAT_STATUS (stat)	Uint8	Status (status code, etc.)
CDC_STAT_FLGREP (stat)	Uint8	CD flag and repeat count for CD reports
CDC_STAT_CTLADR (stat)	Uint8	CONTROL / ADR bytes for CD reports
CDC_STAT_TNO (stat)	Uint8	CD report track number (binary value)
CDC_STAT_IDX (stat)	Uint8	CD report index number (binary value)
CDC_STAT_FAD (stat)	Uint32	CD report frame address

(2) Related macros

Macro name	explanation
CDC_GET_STC (stat)	Get status code from CD status information
CDC_GET_REPEAT (stat)	Get the number of repeats from the CD status information

List

Title Data specifications

Data Hardware information

Data Name CdcHw

No 6.2.

(1) Hardware information …… CDC_GetHwlnfo function

CdcHw * hw

Access macro	Mold	explanation
CDC_HW_HFLAG (hw)	Uint8	Hardware flag
CDC_HW_VER (hw)	Uint8	CD block version information
CDC_HW_MPVER (hw)	Uint8	MPEG version information ・ For 0: MPEG cannot be used * ・ Other than 0: MPEG can be used
CDC_HW_DRV (hw)	Uint8	CD drive information
CDC_HW_REV (hw)	Uint8	CD block revision information

* It is necessary to execute the MPEG check of the service routine in the BOOT ROM.

(2) Hardware flag

bit 7 6 5 4 3 2 1 0
    [] [-] [-] [-] [-] [-] [] [-]
     | |   
     | |
     | + ------- CDC_HFLAG_MPEG 1: MPEG cartridge installed |
     + ------------------------- CDC_HFLAG_HERR 1: Hardware error occurred 

List

Title Data specifications

Data CD position parameter (1/2)

Data Name CdcPos

No 6.3

It is used to specify the playback range (start position, end position) of a CD, and to specify the seek position.

(1) Position type

Positional parameters can be default, frame address, track / index, or unchanged. Specify which one to select with the following constants (position type).

Constant name	explanation
CDC_PTYPE_DFL	Specifying a default value_When playing a CD: Representing the beginning / end of a disc When seeking: Representing the home position
CDC_PTYPE_FAD	Frame address specification
CDC_PTYPE_TNO	Track / index specification
CDC_PTYPE_NOCHG	Unchanged specification (do not change the set value)

Disc head: FAD = 150 (96H) position (absolute time 2 seconds 0 frame)

Disk end: FAD = readout start frame address (TOC information) -1 position

(2) Position parameter …… CDC_CdSeek function

CdcPos * pos

Access macro	Mold	explanation
CDC_POS_PTYPE (pos)	Sint32	Position type
CDC_POS_FAD (pos)	Sint32	Frame address, number of FAD sectors
CDC_POS_TNO (pos)	Uint8	Track number
CDC_POS_IDX (pos)	Uint8	Index number

(3) Setting method

1. Specifying the default value

   CdcPos poswk, * pos = & poswk;
   CDC_POS_PTYPE (pos) = CDC_PTYPE_DFL;
   

2. Frame address specification

   CdcPos poswk, * pos = & poswk;
   CDC_POS_PTYPE (pos) = CDC_PTYPE_FAD;
   CDC_POS_FAD (pos) = fad; / * frame address * /
   

   For the end position, specify the number of sectors from the start FAD (number of FAD sectors).

3. Track / index specification

   CdcPos poswk, * pos = & poswk;
   CDC_POS_PTYPE (pos) = CDC_PTYPE_TNO;
   CDC_POS_TNO (pos) = tno; / * Track number * /
   CDC_POS_IDX (pos) = x; / * Index number * /
   

4. Unchanged designation

   CdcPos poswk, * pos = & poswk;
   CDC_POS_PTYPE (pos) = CDC_PTYPE_NOCHG;
   

(4) Frame address exceptions

Depending on the condition, the frame address is interpreted as follows.

conditions	Start position, seek position	End position
FAD <disc top	FAD = beginning of disk (150)	FAD = beginning of disk-1 (The number of FAD sectors is 0)
FAD> Last disc	FAD = last disk +1 (Equivalent to lead out)	FAD = last disc

Relationship between start position and end position	: End FAD = Start FAD + Number of FAD sectors-1
If start FAD <150	: End FAD = 150 + number of FAD sectors-1

The contents of the playback range that are retained are the start FAD and end FAD.

(5) Track / index exceptions

Depending on the condition, the track / index is interpreted as follows.

conditions	Start position, seek position	End position
TNO = 0 (Track default)	TNO = first track on disc	TNO = last track of disc
X = 0 (Index default value)	X = 1	X = 99 (63H)
TNO <first track on disc	TNO = first track on disc X = 1 (same as X = 0)	TNO = first track on disc X = 99 (same as X = 0)
TNO> Last track of disc	TNO = last track of disc X = 1 (same as X = 0)	TNO = last track of disc X = 99 (same as X = 0)
X does not exist	(From the next track)	(Until the end of the track)

TNO: track number, X: index number

X = 0 means that only the track is specified. (Track start / end index)
TNO = X = 0 is the default value for the position parameter.
(Start position: disc start position, end position: disc end, seek position: home position)

(6) Exceptions to the playback range

If the end position <start position, the playback range is retained, but the CD is not played.
(In both cases of frame address specification and track / index specification)

(7) Meaning of special designation

• Specify default value for seek position: Used as a stop command. (Seek to home position)

• Specifying the seek position unchanged: Used as a pause command.

• Specifying the playback range unchanged: Used to cancel the pause (restart CD playback).

List

Title Data specifications

Data CD playback parameters

Data Name CdcPly

No 6.4

Used to specify the playback range and playback mode when playing a CD.

(1) Playback mode

When playing a CD, specify the maximum number of repeats in the playback section and the pickup position (playback position).

bit 7 6 5 4 3 2 1 0
    [] [] Default value (initial value): 00H
     | Maximum number of repeats (The valid range of the specified number of times is the lower 4 bits)
     |
     | 00H → No repeat (play only once)
     | 01H ~ 0EH → Repeat specified number of times (1 to 14 times repeat)
     | 0FH → Infinite repeat | 7FH → Do not change the maximum number of repeats |
     + ------------------------- 0: Do not change the pickup position (play from the current position)
                                1: Move the pickup to the start position (play from the start position)

Constant name	explanation
CDC_PM_DFL	Playback mode default (no repeat, move pickup to start position)
CDC_PM_REP_NOCHG	Do not change the maximum number of repeats
CDC_PM_PIC_NOCHG	Do not change the pickup position
CDC_PM_NOCHG	Playback mode (maximum number of repeats, pickup position) Do not change

<< When the pickup position is not changed >>

You can start playback from any position by seeking and then executing. If you execute it during <PLAY>, you can change only the playback range and the maximum number of repeats without interrupting the CD playback.
As a result of execution, if the current position goes out of the playback range, repeat processing will be performed.

(2) Playback parameters …… CDC_CdPlay function

CdcPly * ply

Access macro		Mold	explanation
CDC_PLY_START (ply)		CdcPos	Playback start position parameter
	CDC_PLY_STYPE (ply)	Sint32	Start position type
	CDC_PLY_SFAD (ply)	Sint32	Start position frame address
	CDC_PLY_STNO (ply)	Uint8	Start position Track number
	CDC_PLY_SIDX (ply)	Uint8	Start position index number
CDC_PLY_END (ply)		CdcPos	Playback end position parameter
	CDC_PLY_ETYPE (ply)	Sint32	End position type
	CDC_PLY_EFAS (ply)	Sint32	End position Frame address Number of sectors
	CDC_PLY_ETNO (ply)	Uint8	End position track number
	CDC_PLY_EIDX (ply)	Uint8	End position index number
CDC_PLY_PMODE (ply)		Uint8	Playback mode (repeat designation, pickup movement)

(3) How to set playback parameters

The playback parameters specify the playback range and playback mode. The playback range is specified by the combination of the position parameters of the start position and the end position.

1. You cannot combine track specification and frame address specification for the playback range.
   In that case, it returns REJECT. All other combinations of playback ranges are possible.

2. All combinations of playback range and playback mode are possible.

3. The playback range and maximum number of repeats are retained within the CD block and are valid until reset.

4. Default value: From the beginning of the disc to the end of the disc, no repeat, move the pickup

A setting example is shown below.

NO	How to play	Starting position	End position	remarks
1	Track designation	tno1, x1	tno2, x2
2	Frame address specification	fad	fasnum	Note 1
3	Play from the beginning of the disc	CDC_PTYPE_DFL	tno2, x2
			fasnum
Four	Play to the end of the disc	tno1, x1	CDC_PTYPE_DFL
		fad
Five	Do not change the end position (change only the start position)	tno1, x1	CDC_PTYPE_NOCHG	Note 2
		fad
6	Do not change the start position (change only the end position)	CDC_PTYPE_NOCHG	tno2, x2	Note 2
			fasnum
7	Resume CD playback (cancel pause) without changing playback parameters	CDC_PTYPE_NOCHG	CDC_PTYPE_NOCHG	In play mode CDC_PM_NOCHG To specify.

"labels"

fad	: Frame address
fasnum	: Number of frame address sectors
tno1	: Starting track number
tno2	: End track number
x1	: Starting index number
x2	: End index number

Note 1: fad + fasnum−1 is retained as the end position.

Note 2: Even if one of them has not been changed, the combination of track and frame address specification is not possible.

(4) Exceptions to the playback range

If the end position <start position, it will not be played. As with the outside of the playback range, it will be in the <PAUSE> state.
However, the playback range is retained and the playback mode is also valid.

List

Title Data specifications

Data Subheader condition

Data Name CdcSubh

No 6.5 6.5

Used when setting / acquiring subheader conditions for aperture.

(1) Subheader condition …… CDC_SetFiltSubh, CDC_GetFiltSubh function

* subh

Access macro	Mold	explanation
CDC_SUBH_FN (subh)	Uint8	File number
CDC_SUBH_CN (subh)	Uint8	Channel number
CDC_SUBH_SMMSK (subh)	Uint8	Submode mask pattern
CDC_SUBH_SMVAL (subh)	Uint8	Submode comparison value
CDC_SUBH_CIMSK (subh)	Uint8	Coding information mask pattern
CDC_SUBH_CIVAL (subh)	Uint8	Comparison value of coding information

-Mask pattern: Bit pattern to be compared

-Comparison position: Comparison value of bits specified by the mask pattern

The submode and coding information are determined to be equal to the comparison value after being ANDed with the mask pattern.

Conditional expression

(Submode & SMMSK) = SMVAL (Coding information & CIMSK) = CIVAL

(2) Sub mode

bit 7 6 5 4 3 2 1 0
    [] [] [] [] [] [] [] []
     | | | | | | | |
     | | | | | | | + ---- CDC_SM_EOR 1: Last sector of the record | | | | | | + ------- CDC_SM_VIDEO 1: Video sector | | | | | + ------ ---- CDC_SM_AUDIO 1: Audio Sector | | | | + ------------- CDC_SM_DATA 1: Data Sector | | | + -------------- --CDC_SM_TRIG 1: Trigger ON
     | | + ------------------- CDC_SM_FORM 1: Form2 0: Form1
     | + ------------------------ CDC_SM_RT 1: Real-time sector + -------------------- ----- CDC_SM_EOF 1: Last sector of file 

List

Title Data specifications

Data Sector information

Data Name CdcSct

No 6.6

(1) Sector information …… CDC_GetSctInfo function

CdcSct * sct

Access macro	Mold	explanation
CDC_SCT_FAD (sct)	Sint32	Frame address
CDC_SCT_FN (sct)	Uint8	File number
CDC_SCT_CN (sct)	Uint8	Channel number
CDC_SCT_SM (sct)	Uint8	Submode
CDC_SCT_CI (sct)	Uint8	Coding information

List

Title Data specifications

Data File information

Data Name CdcFile

No 6.7

(1) File information …… CDC_TgetFileInfo function

CdcFile * file

Access macro	Mold	explanation
CDC_FILE_FAD (file)	Sint32	File first frame address
CDC_FILE_SIZE (file)	Sint32	File size (number of bytes) * 1
CDC_FILE_UNIT (file)	Uint8	File unit size
CDC_FILE_GAP (file)	Uint8	Gap size
CDC_FILE_FN (file)	Uint8	File number * 2
CDC_FILE_ATR (file)	Uint8	File attributes

* 1: Indicates the net file size, not including the gap sector at the time of interleaving.

* 2: If there is no system information in the directory record, the file number will be 0.

(2) File attributes

bit 7 6 5 4 3 2 1 0
    [] [] [] [] [] [-] [] [-]
     | | | | | |
     | | | | | |
     | | | | | + ------- CDC_ATR_DIRFG 1: Directory * 3
     | | | | |
     | | | | + ------------- CDC_ATR_FORM1 1: Includes Form1 sector * 4
     | | | + ---------------- CDC_ATR_FORM2 1: Includes Form2 sector * 4
     | | + ------------------- CDC_ATR_INTLV 1: Includes interleaved sectors * 4
     | + ---------------------- CDC_ATR_CDDA 1: CD-DA file * 4
     + ------------------------- CDC_ATR_DIRXA 1: Directory file * 4

* 3: bit1 is the directory bit of the file flag in the directory record.

This is valid when there is no system information in the directory record.

(If there is system information, bit7 is prioritized for directory determination)

* 4: Bit3 to 7 are attribute information conforming to the CD-ROM XA standard.

If there is no system information, bit3 to 7 are all set to 0.