3.2 Definition of disk session structure

Figure 3.1 shows an overview of the disk session structure definition.

↑ Disc output file name ｜ Session {CDROM ｜ SEMIXA} ↑
｜ LeadIn MODE1 ← Leadin ｜
｜ ｜
｜ EndLeadIn ｜
｜ ｜
｜ SystemArea File name for system area ｜
｜ ｜
｜ Track {MODE1} ← Track 1 ｜
｜ ： ｜
De EndTrack Say Track {MODE1 | MODE2 | CDDA} ← Track 2 ss: Shiku EndTrack ｜ N ｜ LeadOut {MODE1 | MODE2 | CDDA} ← Leadout ｜         
｜ Empty 300 ｜　
｜ EndLeadOut ↓　
｜ EndSession                                                     
↓ End Disc                                                              

Figure 3.1 Disk session definition

List

Title Command specifications

Command Start disk definition

Keyword Disc

No 2.1

Form

Disc dskfile

Parameters

dskfile: Disk image file (extension is "DSK")

function

Start disk definition.

remarks

none

List

Title Command specifications

Command End of disk definition

Keyword EndDisc

No 2.2

Form

EndDisc

Parameters

none

function

Finish the disk definition.

remarks

none

List

Title Command specifications

Command Specifying the catalog number

Keyword CatalogNo

No 2.3

Form

CatalogNo digits

Parameters

digits: A string of numbers within 13 digits.

function

Define the catalog number.

remarks

This command is left for compatibility. No need to write.
The catalog number is not reflected in the disk image.

List

Title Command specifications

Command Start session definition

Keyword Session

No 2.4

Form

Session disctype [filename]

Parameters

disctype: Disc type (CDROM or SEMIXA)

filename: The file name to output the disk image. Optional.

function

Start defining the session.

remarks

The parameter filename is left for compatibility. No need to write.

List

Title Command specifications

Command End of session definition

Keyword EndSession

No 2.5

Form

EndSession

Parameters

none

function

Ends the session definition.

remarks

List

Title Command specifications

Command Start of lead-in area definition

Keyword LeadIn

No 2.6

Form

LeadIn trktype

Parameters

trktype: Track type (only MODE1 can be specified)

function

Start defining the lead-in area.

remarks

Currently, only MODE1 can be defined for the first track.

List

Title Command specifications

Command End of lead-in area definition

Keyword EndLeadIn

No 2.7 2.7

Form

EndLeadIn

Parameters

none

function

Finishes the lead-in area definition.

List

Title Command specifications

Command System area definition

Keyword System Area

No 2.8

Form

SystemArea filename

Parameters

filename: Data file for system area.

function

Writes the specified file to the system area (00:02:00 to 00:02:15) specified by ISO9660.

remarks

Null data is output where the specified file is less than 16 sectors (32768 bytes). If it exceeds 16 sectors, an error will occur.

List

Title Command specifications

Command Start of lead-out area definition

Keyword LeadOut

No 2.9

Form

LeadOut trktype

Parameters

trktype: Track type (MODE1, MODE2 or CDDA)

function

Start defining the lead-out area.

remarks

Specify the same track type as the last track in the session in the lead-out area.

List

Title Command specifications

Command End of lead-out area definition

Keyword EndLeadOut

No 2.10

Form

EndLeadOut

Parameters

none

function

Finishes the lead-out area definition.

List

Title Command specifications

Command Definition of null data for readout

Keyword Empty

No 2.11

Form

Empty nsect

Parameters

nsect: Number of output sectors of null data in the readout area.

function

Outputs null data for the specified number of sectors.

remarks

This command is left due to VCD emulator limitations. It is recommended to output 300 sectors or more for reliable operation of the emulator.