Technical information

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SATURN Virtual CD System User's Manual

2.0 The CD Emulation Process Explained

This chapter explains the three CD emulation modes. The process is virtually the

same for each model, except that the files required to run the emulations differ.

These files are created by emulation preprocessing programs. Preprocessing pro-

grams are provided for each of the emulation types.

Direct DOS File Access

This CD emulation model uses a set of pre-CD image data files and CD configura-

tion data files. A preprocessing program that creates the CD configuration data file

from the script file is provided. See section 2.1 for more details.

Real Time Simulation

The actual CD image file is used for this emulation method. A preprocessing pro-

gram that creates the CD image file from the script file is provided. See section 2.2

for more details.

Partial CD Image Update

This model requires CD image files, MS-DOS files for the revised portions, and

update data files. A preprocessing program that creates the updated information file

is provided. The parameters for running the emulation differ from those of the other

models. See section 2.3 for more details.

Figure 4 gives an overview of the emulation process.