(2) Creation of materials and programs
Prepare the image data and programs to be placed on the

CD in the form of MS-DOS files.

 
 
 CD-DA file format
・ Binary file of MS-DOS file format
・ Data in PC format compatible with Virtual CD is in Intel format (little endian) as shown in Fig. 3.
It must be lined up.
∙ If the data is in Motorola format (big endian), perform byte swap in advance.
It is necessary. 

(3) CD layout information description

Specifies how to place MS-DOS files such as materials and programs on the CD.
A certain format is determined so that the structure of the CD can be described, and input is performed according to this format using a text editor. Such a file is called a “script file” and its contents are called a “script”.
Creating this script file is a description of the CD layout. How to create this script file is described in Chapter 3 Creating Data.

VCDPRE.EXE.
Perform this work when performing "Direct DOS File Access".
VCDPRE.EXE inputs a script file, calculates the correspondence between each MS-DOS file and the CD access position (minute, second, frame value), and creates a correspondence table in the file. The file generated by this VCDPRE.EXE is read and used by the virtual CD emulator.

VCDBUILD.EXE. Perform this work when performing "real-time emulation".
VCDBUILD.EXE inputs a script file and creates a CD image and TOC information in the file. The file generated by VCDBUILD.EXE is read and used by the virtual CD emulator.