Technical information

SEGA Confidential
SATURN Virtual CD System User's Manual
21
2.1 Running a Simulation Using MS-DOS Files
This section describes the operating procedures for using the Direct DOS File Access
mode.
Step 0-Delete existing .DSK files.
Direct DOS File Access mode emulation cannot take place with DSK files. The DSK file
indicates that real time emulation was run previously, resulting in the creation of the
DSK file. Before proceeding, delete all unnecessary DSK files.
Example 0 C:\>DEL∆TSTGAME.DSK[ENTER]
Step 1- Define the project name.
This is used as the file name of the MS-DOS file. It must follow standard MS-DOS
file name specifications.
Example 1 TSTGAME
TSTGAME is used as the file name example in this chapter.
Step 2- Create the script file.
With Chapter 3 as your guide, create the script file using a text editor. The file name
of the script file must be the project name with an
SCR extension, as follows.
Example 2 TSTGAME.SCR
Step 3- Create the launch file (parameter file) for the preprocessing program (VCDPRE.EXE).
Use a text editor to create the launch file.
Example 3 The following are examples of launch files.
C:\>TYPE∆TSTGAME.PRM[ENTER]
SCR∆TSTGAME.SCR [ENTER]
RTI∆TSTGAME.RTI [ENTER]
Step 4- Start the preprocessing program VCDPRE.EXE.
Entering the command as shown in the example will start the preprocessing pro-
gram (
VCDPRE.EXE) and create the file required for emulation.
Example 4 C:\>VCDPRE.∆TSTGAME.PRM[ENTER]
Result 4 As specified by the launch file CD configuration
information file
TSTGAME.RTI is created.
Step 5- Change system to English mode (for users with Japanese DOS/V systems only).
The VCD emulator does not work in Japanese mode, so change the display to En-
glish mode. Enter the following command:
Example 5 C:\>CHEV∆US[ENTER]
Result 5 If the machine is in U.S. mode, the screen flashes and a
prompt appears at the top of the screen.