When using this document, keep the following in mind:nti
alGeneral Notice

1. This document is confidential. By accepting this document you acknowledge that you are boundby the terms set forth in the non-disclosure and confidentiality agreement signed separately and /inthe possession of SEGA. If you have not signed such a non-disclosure agreement, please contact
SEGA immediately and return this document to SEGA.

de2. This document may include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new versions of thedocument. SEGA may make improvements and/or changes in the product(s) and/or theprogram(s) described in this document at any time.

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3. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document
without SEGA’S written permission. Request for copies of this document and for technicalinformation about SEGA products must be made to your authorized SEGA Technical Services
representative.
4. No license is granted by implication or otherwise under any patents, copyrights, trademarks, orother intellectual property rights of SEGA Enterprises, Ltd., SEGA of America, Inc., or any thirdparty.

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5. Software, circuitry, and other examples described herein are meant merely to indicate the characteristics and performance of SEGA’s products. SEGA assumes no responsibility for any intellectualproperty claims or other problems that may result from applications based on the examples
describe herein.

GA

6. It is possible that this document may contain reference to, or information about, SEGA products(development hardware/software) or services that are not provided in countries other than Japan.
Such references/information must not be construed to mean that SEGA intends to provide such
SEGA products or services in countries other than Japan. Any reference of a SEGA licensed product/program in this document is not intended to state or simply that you can use only SEGA’slicensed products/programs. Any functionally equivalent hardware/software can be used instead.
7. SEGA will not be held responsible for any damage to the user that may result from accidents or any
other reasons during operation of the user’s equipment, or programs according to this document.

SENOTE: A reader's comment/correction form is provided with thisdocument. Please address comments to :SEGA of America, Inc., Developer Technical Support (att. Evelyn Merritt)
150 Shoreline Drive, Redwood City, CA 94065

SEGA may use or distribute whatever information you supply in any way
it believes appropriate without incurring any obligation to you.

(11/2/94- 002)

SEGA

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TM

Virtual CD System(Release 3)
Limitations
Doc. # ST-182-081294© 1994 SEGA. All Rights Reserved.

nti
alREADER CORRECTION/COMMENT SHEETKeep us updated!
If you should come across any incorrect or outdated information while reading through the attacheddocument, or come up with any questions or comments, please let us know so that we can make therequired changes in subsequent revisions. Simply fill out all information below and return this form to
the Developer Technical Support Manager at the address below. Please make more copies of this form if
more space is needed. Thank you.
General Information:

Phone

Document number
Document namedeYour NameDate

ST-182-081294

Virtual CD System (Release 3) Limitations

Corrections:Correctionnfi

pg. #GACo

Chpt.

SE

Questions/comments:

Fax:

Where to send your corrections:(415) 802-3963
Attn: Manager,
Developer Technical Support

Mail:

SEGA OF AMERICA
Attn: Manager,
Developer Technical Support
275 Shoreline Dr. Ste 500
Redwood City, CA 94065

Introduction

nti
alTo accompany the upgrade of the main software of the virtual CD system currently
being used, the firmware on the virtual CD interface board needs to be replaced toenable the use of the new main software. To this end, SEGA has included newfirmware (Ver 3.1) contained in EPROM with this notice. Please follow the instructions below to replace the ROM on the CD interface board.
When using the new main software, make sure that the new firmware (ver 3.1) has
been installed. If the new software is used with old firmware, the system will not
operate correctly, or may not operate at all. Also, please make sure to return the old
ROM as quickly as possible.

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If the board is installed in the computer, first shut off the computer power.
Remove the 50P interface cable from the virtual CD interface board.
Remove the cover of the computer, then loosen and remove the screws that fix
the virtual CD interface board in place.
Carefully remove the board from the expansion slot and place the board on adesk or table covered with an anti-static sheet. Locate the ROM labeled MEM1
as shown on the diagram below and use a screwdriver or similar tool to pry up
and remove the EPROM from the IC socket. Be careful not to bend the legs.

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1.
2.
3.

deROM Replacement Procedure

Replace this IC

MEM1
MarkGAPart Surface
Connector

CPUSEEdge Connector

5.

6.
7.

Install the new Ver.3.1 EP-ROM, sent with this notice, into the same location bypressing it into the IC socket; make sure the direction of the new IC is correctand confirm that it has been correctly installed.
Reverse the above procedures to reinstall the board back into the computer.
Install the main software and verify the operation of the new software by following the procedures in the operation manuals.

Virtual CD System (Rel. 3) Limitations

1

ntialAugust 8, 1994
SEGA of America
Technical Support
FAX: 415-802-3963

Virtual CD System (Release 3)

deThe virtual CD software has been upgraded. We are sending the upgrade alongwith sample CD programs. This upgrade requires the replacement of the virtual CD
board ROM for the new software to function. Refer to the procedure for replacing
the ROM as shown on the previous page.
Items SuppliedSEGA

Confi· Virtual CD System and Sample ProgramVol
1/3 · · · 1
2/3 · · · 1
3/3 · · · 1· Virtual CD System and Sample Program Installation method· Virtual CD System (Release 3) Restrictions

2End

Virtual CD System (Release 3) Limitations
VCDEMU

ntial

1. The file interleave function in direct DOS file access is not supported.

2. The channel interleave function in direct DOS file access is not supported.
(Is scheduled to be in the final specification.)
3. Scan FWD/REV is not supported.
4. Multi-index is not supported.
VCDPRE, VCDBUILDde

1. The following keywords are removed from the limitations list: Pause, PreGap,
PostGap. Refer to Virtual CD Software release 2 documentation for otherlimitations. (In the CD tool and software library supporting documentation.)

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2. Always use the File command and the EndFile command in the CDDA track.
Currently CDDA must be defined as a ISO9660 file.

1. Some script lines are scheduled to be changed for the next release.

SEGACo

2. VCDUTL is not included.

Virtual CD System (Rel. 3) Limitations

3

1.

Install the executable programs
Install the following files into the development machine.
[Disk#1] ¥saturn¥segabin¥vcd¥jvc.abs¥saturn¥segabin¥vcd¥jvc.ini¥saturn¥segabin¥vcd¥sddrv.tsk¥saturn¥segabin¥vcd¥systbl.tsk¥saturn¥segabin¥vcd¥newmap.bin

2.

Install the Virtual CD Software
Install the following files into the virtual CD development machine.
[Disk#1] ¥saturn¥segabin¥vcd¥vcdbuild.exe

de¥saturn¥segabin¥vcd¥vcdemu.exe¥saturn¥segabin¥vcd¥vcdmktoc.exe¥saturn¥segabin¥vcd¥vcdpre.exe

Install the Source Data for CD Image Creation
Install the following files into the virtual CD development machine.
[Disk#1] ¥saturn¥segabin¥vcd¥jvc.scr

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3.

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al

Virtual CD System (Release 3) Installation

4.

Co¥saturn¥segabin¥vcd¥jvc.rti¥saturn¥segabin¥vcd¥jvc.pvd¥saturn¥segabin¥vcd¥jvc.prm¥saturn¥segabin¥vcd¥pat_1.dat¥saturn¥segabin¥vcd¥pat_10.dat[Disk#2] snd8_1.dat[Disk#3] snd8_3.dat

Create the CD Disk Image
Create the CD disk image in the CD development machine.
a. Create a working file of the preprocessing program, then create the following
files.
C:¥>type jvc.pre(RET) Create a file with these contents.

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scr jvc.scr
rti jvc.rti

b. Startup the preprocessing programC:¥>vcdpre jvc.pre(RET)c. Create the CD Disk Image FileC:¥>vcdbuild jvc.pre(RET)

A file called jvc.dsk is created.
5.

Start the Virtual CD Emulator
Start the virtual CD emulator in the CD development machine.

SEC:¥>chev us /f(RET)C:¥>vcdemu jvc(RET)The virtual CD emulator will start.

4

Reading the Program
Start the program development machine and Model M and execute the following:

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6.

:[BOOT ROM Initialization]:<jvc.ini(RET):g 6002000(RET)

SEGA

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deFor more information on virtual CD, refer to the Virtual CD System User’sManual.

Virtual CD System (Rel. 3) Limitations

5