2. Basic matters

2.1 Package configuration

The XBLD package consists of the following files.

Table 2.1 XBLD package configuration file

File	explanation
XBLD.EXE	DOS extender version XBLD (works in MS-DOS environment)
XBLD32.EXE	32-bit version XBLD (works only in Windows95 DOS window environment)
SAMPLE.SCR	Sample script file
SAMPLE.BLD	Sample subcommand file
MANXBLD.TXT	CD Builder XBLD External Specifications

2.2 Operating environment

This system operates in a DOS environment on an IBM-PC.
The required hardware and software are listed below.

Table 2.2 Operating environment

Item		Operating conditions, models, etc.
		XBLD	XBLD32
hardware
	IBM-PC compatibles	80486 / 33MHz and above
	memory	8Mbyte or more
	hard disk	600Mbyte or more (VCD recommended model)
	CD-R drive * 1	YAMAHA CDE100 / CDE102
	SCSI I / F board * 1	adaptec SCSI MASTER (recommended)
	VCD I / F board * 2	I / F board for CD emulation
software
	OS	MS-DOS Windows95 (DOS window)	Windows95 (DOS window)
	DOS extender	DOS / 4GW DOS extender	Unnecessary
	driver	ASPI driver * 1
	Other tools	Write-once system * 1 (ADDCDW), VCD emulator * 2 (VCDEMU), etc.

* 1

When writing to a CD-R disc, hardware software such as a CD-R drive, SCSI I / F board, ASPI driver, and write-once system is required.

* 2

For CD emulation, related hardware and software such as VCD I / F board and VCD emulator are required.

2.3 Input / output files

(1) Input file

Specify it as an input file for XBLD when creating a CD or performing CD emulation.

Table 2.3 XBLD input files

SCR file		Script file
	file name	scrfile.scr
	explanation	Specifies how the program data is placed on the CD. (The script grammar is the same as VCDBUILD)

(2) Output file

XBLD outputs the file as follows according to the operation mode.

Table 2.4 XBLD operating modes and output files

XBLD operation mode	Subcommand	Output file
CD creation	unspecified	DSK, TOC
Real-time emulation	r	DSK, TOC, RTI
Direct DOS file access	p	PVD, TOC, RTI, QSB
On-the-fly writing	otf	PVD, TOC, SCT, OTI

Table 2.5 XBLD output file

DSK file		Disk image (CD image)
	file name	dskbase.dsk (specified by the Disc command in the script file)
	Output destination	The path specified by the Disc command in the script file
	size	Several Mbytes to 600Mbyte (file size of the same capacity as the created CD)
	explanation	A file in which the image of a CD required for creating a CD (writing to a CD-R) or performing CD emulation is constructed as it is.

TOC file		TOC information file
	file name	dskbase.toc (DSK file base name + extension TOC)
	Output destination	Output to the same position as the DSK file
	size	(Total number of indexes + 2) x 8 bytes
	explanation	A file that describes track information. Used when creating a CD.

RTI file		CD configuration information file
	file name	dskbase.rti (DSK file base name + extension RTI)
	Output destination	Output to the same position as the DSK file
	size	Number 10byte to Number 10Kbyte
	explanation	It analyzes the SCR file and outputs the CD configuration information as an RTI file. CD emulation (real-time emulation, direct DOS It is used when performing file access).

PVD file
	file name	pvdfile.pvd (Specified by the Primariy Volume command in the script file)
	Output destination	The path specified by the Primariy Volume command in the script file
	size	Number 10Kbyte ~ Number 100Kbyte
	explanation	A file that records the contents of a PVD (basic volume descriptor). When performing CD emulation by direct DOS file access It is also used for on-the-fly writing.

QSB file
	file name	vcd0000.qsb ~ vcd9999.qsb
	Output destination	Output to the same position as the DSK file
	size	Number of CDDA source file sectors x 98 bytes
	explanation	A file containing information about CDDA tracks. It is used when performing CD emulation by direct DOS file access.

SCT file
	file name	dskbase.sct (DSK file base name + extension TOC)
	Output destination	Output to the same position as the DSK file
	size	(Number of DOS files + number of gaps) x 28 bytes
	explanation	This is an XBLD-specific file. Used when writing on the fly, A file that records disk sector information.

OTI file
	file name	xbld0000.oti ~ xbld9999.oti
	Output destination	Output to the same position as the DSK file
	size	Several hundred Kbytes to several tens of Mbytes (interleaved file size)
	explanation	This is an XBLD-specific file. Used when writing on the fly, Interleaved intermediate file.

2.4 Definition of terms

Defines the basic terms used in this system.

Subcommand

Instructions for XBLD.
Specify a subcommand as a command option for XBLD.

Subcommand file

A file that describes subcommands. Specify subcommands by file instead of command options.

DOS window

Refers to a Windows MS-DOS window. XBLD32, a 32-bit version of XBLD, only works in Windows 95 DOS windows.

DOS extender

Basic software for using protected mode from MS-DOS.
A typical DOS extender is DOS / 4GW.

CD builder

A tool for creating disk image files.
There are XBLD and VCDBUILD in the CD builder for Sega Saturn.

DSK file (disk image)

A file in which the CD image required for CD creation or CD emulation is constructed as it is.

TOC file

A file that describes track information.
Used when creating a CD.

ISO file

A file recorded on an ISO9660 standard CD.

DOS file (source file)

The MS-DOS file from which the disk image is created.

ISO9660 standard

A standard that defines the logical format of a CD-ROM.

ISO11172 standard

MPEG-1 standard. In addition to MPEG video and MPEG audio, it includes system standards that handle synchronization and multiplexing of them.

ISO11172 stream

This refers to multiplexing of MPEG video and MPEG audio.

Write-once system (CD-R writing software)

Software that writes to CD-R discs.
There are ADDCDW and SEGACDW as write-once systems for Sega Saturn.

ADDCDW

A write-once system that allows you to write to a CD-R disc multiple times.
It also supports on-the-fly writing.

On-the-fly writing

A method of writing to a CD-R disc while creating a sector image of the disc (no need to create a DSK file).
On-the-fly writing can be performed by linking XBLD and ADDCDW.