U.S. patent number RE35,839 [Application Number 08/519,580] was granted by the patent office on 1998-07-07 for cd-rom disk and security check method for the same.
This patent grant is currently assigned to Kabushiki Kaisha Sega Enterprises. Invention is credited to Toshinori Asai, Masaki Kawahori.
United States Patent |
RE35,839 |
Asai , et al. |
July 7, 1998 |
CD-ROM disk and security check method for the same
Abstract
A CD-ROM disk comprises an identifier region having a disk
identifier recorded in and a security code region having a security
code recorded in. The identifier region and the security code
region are provided in one sector of a boot sector to be read when
actuated. The disk identifier includes a preset identification
code, and the security code includes at least a program to be
executed after check of the security code, and display data for
displaying a license. A security check method for a CD-ROM disk
comprising the steps of reading data recorded in the boot sector of
the CD-ROM disk when actuated, comparing the disk identifier read
from the identifier region of the boot sector with an stored
identifier to check whether or not the read disk identifier is
correct, comparing the security code read from the security region
of the boot sector with a stored security code to check whether or
not the read security code is correct, and executing the program
contained in the security code when the read disk identifier and
the read security code are correct, and displaying a license based
on the display data.
Inventors: |
Asai; Toshinori (Yokosuka,
JP), Kawahori; Masaki (Chiba, JP) |
Assignee: |
Kabushiki Kaisha Sega
Enterprises (JP)
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Family
ID: |
11931920 |
Appl.
No.: |
08/519,580 |
Filed: |
August 25, 1995 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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956262 |
Oct 5, 1992 |
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Reissue of: |
171756 |
Dec 21, 1993 |
05371792 |
Dec 6, 1994 |
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Foreign Application Priority Data
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Jan 31, 1992 [JP] |
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4-017006 |
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Current U.S.
Class: |
713/2; 369/53.21;
705/59 |
Current CPC
Class: |
G06F
21/10 (20130101); G06F 21/80 (20130101); G11B
7/0037 (20130101); G11B 7/00745 (20130101); G11B
7/013 (20130101); G11B 19/10 (20130101); G11B
19/12 (20130101); G11B 20/00086 (20130101); G11B
20/00094 (20130101); G11B 27/329 (20130101); A63F
2300/201 (20130101); G11B 2220/2545 (20130101); G06F
2211/007 (20130101); G06F 2211/1097 (20130101); G06F
2221/2109 (20130101); A63F 2300/206 (20130101) |
Current International
Class: |
G06F
1/00 (20060101); G06F 21/00 (20060101); G11B
19/12 (20060101); G11B 20/00 (20060101); G11B
023/28 (); G11B 005/09 (); H04L 009/00 () |
Field of
Search: |
;380/3,4,23,25
;364/DIG.1,DIG.2,245.8,246.9,966.4 ;369/47 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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1183276 |
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Feb 1985 |
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CA |
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378385 |
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Jul 1990 |
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EP |
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447043 |
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Sep 1991 |
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EP |
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080244 |
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Aug 1984 |
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FR |
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58-101349 |
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Jun 1983 |
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JP |
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58-186843 |
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Oct 1983 |
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JP |
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3-266051 |
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Nov 1991 |
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JP |
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5-47854 |
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Jul 1993 |
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JP |
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Other References
Macintosh System Software 6.04, Apple Computer, Inc., 1989, p.
88..
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Primary Examiner: Buczinski; Stephen C.
Attorney, Agent or Firm: Dickstein Shapiro Morin &
Oshinsky LLP
Parent Case Text
This application is a .[.continuation-in-part.]. .Iadd.continuation
.Iaddend.of application Ser. No. 07/956,262 filed October 5, 1992,
now abandoned.
Claims
What is claimed is:
1. A CD-ROM disk to be mounted on a CD-ROM device, said CD-ROM disk
comprising an identifier region having a disk identifier recorded
therein, and a security code region having a security code recorded
therein,
the identifier region and the security code region being provided
in one sector of a boot sector to be read when actuated,
the disk identifier including a preset identification code,
the security code including at least a program to be executed after
check of the security code.
2. A CD-ROM disk according to claim 1, wherein the program
includes:
a first step in which head addresses of data recorded in the CD-ROM
disk are set in a register of a first CPU; and
a second step in which a required program routine stored in a
CD-ROM device is executed.
3. A CD-ROM disk according to claim 1, wherein the program
includes:
a first step in which a second CPU provided in the CD-ROM device is
temporarily paused;
a second step in which contents of a program memory of the second
CPU are rewritten with data recorded in the CD-ROM disk;
a third step in which operation of the second CPU is resumed;
a .[.forth.]. .Iadd.fourth .Iaddend.step in which head addresses of
data recorded in the CD-ROM disk are set in a register of a first
CPU; and
a fifth step in which a required program routine stored in the
CD-ROM device is executed.
4. A CD-ROM disk according to claim 1, wherein the security code
includes display data for displaying a license.
5. A CD-ROM disk according to claim 4, wherein the program
includes:
a first step in which head addresses of data recorded in the CD-ROM
disk are set in a register of a first CPU; and
a second step in which a required program routine stored in the
CD-ROM device is executed.
6. A CD-ROM disk according to claim 4, wherein the program
includes:
a first step in which a second CPU provided in the CD-ROM device is
temporarily paused;
a second step in which contents of a program memory of the second
CPU are rewritten with data recorded in the CD-ROM disk;
a third step in which operation of the second CPU is resumed;
a .[.forth.]. .Iadd.fourth .Iaddend.step in which head addresses of
data recorded in the CD-ROM disk are set in a register of a first
CPU; and
a fifth step in which a required program routine stored in the
CD-ROM device is executed.
7. A CD-ROM disk according to claim 4, wherein the security code
includes a LOGOTYPE data indicative of LOGOTYPE to be
displayed.
8. A CD-ROM disk according to claim 7, wherein the program
includes:
a first step in which head addresses of data recorded in the CD-ROM
disk are set in a register of a first CPU; and
a second step in which a required program routine stored in a
CD-ROM device is executed.
9. A CD-ROM disk according to claim 7, wherein the program
includes:
a first step in which a second CPU provided in the CD-ROM device is
temporarily paused;
a second step in which contents of a program memory of the second
CPU are rewritten with data recorded in the CD-ROM disk;
a third step in which operation of the second CPU is resumed;
a .[.forth.]. .Iadd.fourth .Iaddend.step in which head addresses of
data recorded in the CD-ROM disk are set in a register of a first
CPU; and
a fifth step in which a required program routine stored in the
CD-ROM device is executed.
10. A security check method for a CD-ROM disk to be mounted on a
CD-ROM device, said CD-ROM disk including an identifier region
having a disk identifier recorded therein and a security code
region having a security code recorded therein, the identifier
region and the security code region being provided in one sector of
a boot sector to be read when actuated, the disk identifier
including a .[.present.]. .Iadd.preset .Iaddend.identification
code, the security code including at least a program to be executed
after check of the security code,
the security check method comprising:
a first step of reading data recorded in a boot sector of the
CD-ROM disk when actuated;
a second step of comparing the disk identifier read from the
identifier region of the boot sector with a stored identifier to
check whether or not the read disk identifier is correct;
a third step of comparing the security code read from the security
region of the boot sector with a stored security code to check
whether or not the read security code is correct; and
a .[.forth.]. .Iadd.fourth .Iaddend.step of executing the program
contained in the security code when the read disk identifier and
the read security code are correct.
11. A security check method according to claim 10, wherein the
forth step includes:
a first step of setting addresses of data recorded in the CD-ROM
disk in a register of a first CPU; and
a second step of executing a required program routine stored in a
CD-ROM device.
12. A security check method according to claim 10 wherein the
.[.forth.]. .Iadd.fourth .Iaddend.step includes:
a first step of temporarily pausing a second CPU provided in the
CD-ROM device;
a second step of rewriting contents of a program memory of the
second CPU with data recorded in the CD-ROM disk;
a third step of resuming operation of the second CPU;
a .[.forth.]. .Iadd.fourth .Iaddend.step of setting addresses of
data recorded in the CD-ROM disk in a register of a first CPU;
and
a fifth step of executing a required program routine stored in the
CD-ROM device.
13. A security check method according to claim 10, wherein the
security code includes display data for displaying a license and
wherein the fourth step includes displaying a license based on the
display data.
14. A security check method according to claim 13, wherein the
fourth step includes:
a first step of setting addresses of data recorded in the CD-ROM
disk in a register of a first CPU; and
a second step of executing a required program routine stored in the
CD-ROM device.
15. A security check method according to claim 13, wherein the
.[.forth.]. .Iadd.fourth .Iaddend.step includes:
a first step of temporarily pausing a second CPU provided in the
CD-ROM device;
a second step of rewriting contents of a program memory of the
second CPU with data recorded in the CD-ROM disk;
a third step of resuming operation of the second CPU;
a .[.forth.]. .Iadd.fourth .Iaddend.step of setting addresses of
data recorded in the CD-ROM disk in a register of a first CPU;
and
a fifth step of executing a required program routine stored in the
CD-ROM device.
16. A security check method according to claim 13, wherein the
security code includes a LOGOTYPE data indicative of LOGOTYPE to be
displayed, and wherein the forth step includes a step of displaying
a LOGOTYPE based on the LOGOTYPE data.
17. A security check method according to claim 16, wherein the
.[.forth.]. .Iadd.fourth .Iaddend.step includes:
a first step of setting addresses of data recorded in the CD-ROM
disk in a register of a first CPU; and
a second step of executing a required program routine stored in the
CD-ROM device.
18. A security check method according to claim 16, wherein the
.[.forth.]. .Iadd.fourth .Iaddend.step includes:
a first step of temporarily pausing a second CPU provided in the
CD-ROM device;
a second step of rewriting contents of a program memory of the
second CPU with data recorded in the CD-ROM disk;
a third step of resuming operation of the second CPU;
a .[.forth.]. .Iadd.fourth .Iaddend.step of setting addresses of
data recorded in the CD-ROM disk in a register of a first CPU;
and
a fifth step of executing a required program routine stored in the
CD-ROM device.
19. A television game device with a CD-ROM device for mounting a
CD-ROM disk, said CD-ROM disk including an identifier region having
an identifier recorded in and a security code region having a
security code recorded in, the identifier region and the security
code region being provided in one sector of a boot sector to be
read when actuated, the disk identifier including a preset
identification code, the security code including at least a program
to be executed after check of the security code, the television
game device comprising:
an executing means for reading data recorded in said boot sector of
the CD-ROM disk when actuated, comparing the disk identifier read
from the identifier region of the boot sector with a stored
identifier to check whether or not the read disk identifier is
correct, and comparing the security code read from the security
region of the boot sector with a stored security code to check
whether or not the read security code is correct, and for executing
said program in the security code when the read disk identifier and
the read security code are correct.
20. A television game device according to claim 19, wherein the
security code includes display data for displaying a license, and
wherein the executing means displays a license based on the display
data.
21. A television game device according to claim 19, wherein the
security code includes LOGOTYPE data indicative of LOGOTYPE to be
displayed, and wherein the executing means displays a LOGOTYPE
based on the LOGOTYPE data.
22. A television game device according to claim 19, wherein the
executing means sets addresses of data recorded in the CD-ROM disk
in a register, and executes a required program routine stored in
the CD-ROM device.
23. A television game device according to claim 19, wherein the
executing means includes a first CPU and a second CPU, and wherein
the second CPU temporarily pauses the first CPU, rewrites contents
of a program memory of the first CPU in data recorded in the CD-ROM
disk, resumes operation of the first CPU which has been temporarily
paused, sets addresses of data recorded in the CD-ROM disk in a
register, and executes a required program routine stored in the
CD-ROM device. .Iadd.
24. A game device executing a game program loaded from an
information storage medium which stores said game program and a
bootstrap program, said game device comprising:
a memory means which stores reference data; and
an executing means for reading said bootstrap program from said
information storage medium when said information storage medium is
mounted on said game device, comparing said bootstrap program with
said reference data stored in said memory means to check whether or
not said bootstrap program corresponds to said reference data, and
executing said bootstrap when said bootstrap program corresponds to
said reference data. .Iaddend..Iadd.25. A game device executing a
game program loaded from an information storage medium which stores
said game program and a data set including a message-displaying
program and message data, said game device comprising:
a memory means which stores a reference data set including a
reference program; and
an executing means for reading said data set from said information
storage medium when said information storage medium is mounted on
said game device, comparing said read data set with the reference
data set to check at least whether or not said message-displaying
program agrees with said reference program, and executing the
message-displaying program to display a message corresponding to
the message data when said message-displaying program agrees with
said reference program. .Iaddend..Iadd.26. A security check method
for an information storage medium to be mounted on a game device
with a security check function and reference data, said information
storage medium storing a game program and a bootstrap program,
comprising the steps of:
reading said bootstrap program from said information storage medium
when said information storage medium is mounted on said game
device;
comparing said bootstrap program with said reference data to check
whether or not said bootstrap program corresponds to said reference
data; and
executing said bootstrap program when said bootstrap program
corresponds to said reference data. .Iaddend..Iadd.27. A security
check method for an information storage medium to be mounted on a
game device with a security check function and reference data
including a reference program, said information storage medium
storing a game program and a bootstrap program including a data set
of message-displaying program and message data, comprising the
steps of:
reading said bootstrap program from said information storage medium
when said information storage medium is mounted on said game
device;
comparing the read data set in the bootstrap program with said
reference data to check at least whether or not said
message-displaying program agrees with said reference program;
and
executing the message-displaying program to display a message
corresponding to said message data when said message-displaying
program agrees with said reference program. .Iaddend..Iadd.28. An
information storage medium for a game device with a security check
function, said information storage medium having a data storage
area containing a security code which includes a program to be
executed by the game device after a check of the security code by
the game device. .Iaddend..Iadd.29. A software storage medium for
use in an electronic device having means for identifying the nature
of software and means for checking authenticity of the storage
medium, said software storage medium comprising:
a main region storing software to be ready and executed by said
electronic device; and
an initialization region to be read and executed by said electronic
device for initialization of the electronic device and containing
an identifier region storing an identifier code indicative of the
nature of the software, and a security code region storing a
security code including at least a program to be executed after
completion of checking the security code by the electronic device.
.Iaddend..Iadd.30. An information storage medium for use in game
device having means for identifying the type of the information
storage medium mounted thereon and means for checking authenticity
of the information storage medium, said information storage medium
comprising a main region storing a game program to be executed by
said electronic device and an initialization region to be read for
initialization of the electronic device, said initialization region
comprising:
an identifier region storing an identifier code indicative of the
type of said information storage medium; and
a security code region storing a security code including message
data and a message-displaying program to be executed after
completion of checking the security code by the electronic device.
.Iaddend..Iadd.31. A game device for executing a game program
loaded from an information storage medium which stores the game
program and a initialization program, said game device
comprising:
a memory means which stores reference program; and
an executing means for reading the initialization program from the
information storage medium when said information storage medium is
mounted to said game device, comparing the read initialization
program with the reference program stored in said memory means to
check whether or not the read initialization program includes a
program which agrees with said reference program, and executing the
initialization program when the read initialization program
includes a program which agrees with the reference
program. .Iaddend..Iadd.32. An information storage medium for use
with a game device, comprising a data storage area containing a
game program to be executed by the game device and a security code,
said security code comprising a message-displaying program to be
executed by the game device for displaying a message indicating an
authentic source of origin of the game program. .Iaddend..Iadd.33.
A game device having a security check function for executing a game
program loaded from an information storage medium comprising:
means for reading a security code from the information storage
medium when said information storage-medium is mounted on the game
device, said security code including a message-displaying program
for displaying a message indicating an authentic source of origin
of the game program;
a memory means with a reference security code stored therein;
means for comparing said read security code including the
message-displaying program with said reference security code to
determine whether or not the read security code agrees with the
reference security code; and
means for executing said message-displaying program to produce a
display message indicating an originator of the game program.
.Iaddend..Iadd.34. A game device as in claim 33, wherein said means
for executing said message display program operates to display said
message after said comparing means determines that the read
security code agrees with the reference security code.
.Iaddend..Iadd.35. A game device according to claim 33, further
comprising means for enabling the game device to execute a game
operation in accordance with the same program loaded from the
information storage medium when said security code agrees with said
reference security code. .Iaddend..Iadd.36. A game device
comprising:
an information storage medium reader to which an information
storage medium with a stored game program can be mounted;
comparing means for comparing data read from a predetermined area
of an information storage-medium with a reference security code
stored in the game device to check whether or not the read data
agrees with the reference security code;
enabling means for enabling the game device to execute a game
operation in accordance with the game program read from an
information storage medium when the comparing means determines that
the read data agrees with the reference security code;
checking means for checking a status of the information storage
medium reader when the game device is made ready for the game
operation by the enabling means to ensure that an information
storage medium remains coupled to said reader; and,
means for disenabling the game device from executing the game
operation and for causing the information storage medium reader,
the comparing means and the enabling means to initiate again the
reading of data from said predetermined area of an information
storage medium, the comparison of the read data with said reference
security code, and the enabling of the game device to execute a
game operation if the read data agrees with the reference security
code, when the checking means determines that the information
storage medium reader indicates that an information storage medium
from which the data was initially read may have been removed from
said reader. .Iaddend..Iadd.37. A game device according to claim
36, wherein the security code contains a program to be executed
after the comparison of the read data with said reference security
code. .Iaddend..Iadd.38. A game device according to claim 36,
wherein the security code contains a program for displaying a
message indicating an authentic source of origin of the game
program. .Iaddend..Iadd.39. A game device as in claim 35, wherein
said information storage medium is a disk. .Iaddend..Iadd.40. A
game device as in claim 39, wherein said disk is a CD-disk and said
checking means for checking a status of said storage medium
determines whether a tray in said game device for mounting said
CD-disk is opened, after said enabling means has enabled a game
operation. .Iaddend.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a CD-ROM using a musical purpose
CD (compact disk) in a read-only storage medium, and a security
check method for the same.
CDs (compact disks) have been conventionally one of media for
recording sounds. But they have attracted attention as
large-capacity memories for storing information other than music,
such as images, data and so on, because they can digitally record
.[.large.]. .Iadd.larger .Iaddend.amounts of information than any
conventional storage media.
In television game devices, a CD-ROM disk using a CD for the
musical purpose records a large amount of image information, etc.
in addition to a game program, and the image information recorded
in the CD-ROM disk is read as video images in accordance with the
progress of the game. By the use of CD-ROM disks, television games
which have better picture quality and is more illustrative can be
provided. Consequently game software are supplied not only in the
conventional cartridges, but also in CD-ROM disks.
.[.It is general that.]. .Iadd.Generally, .Iaddend.cartridges of
game software and CD-ROMs of game software are exclusively used on
specific television game devices. Each television game maker grants
a license to make game software to be exclusively used on their
game devices. Then it is necessary for the CD-ROM disks as well as
the conventional cartridges to judge whether or not the CD-ROM
disks are for their associated exclusive game devices and to
display their licenses to the effect that the CD-ROMs are duly
licensed and proper.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a CD-ROM disk and
a security checking method for the same, which can judge a kind of
the disk and check whether the disk is duly licensed and
proper.
The object of the present invention can be achieved by a CD-ROM
disk comprising: an identifier region having a disk identifier
recorded in; and a security code region having a security code
recorded in, the identifier region and the security code region
being provided in one sector of a boot sector to be read when
actuated, the disk identifier including a preset identification
code, the security code including at least a program to be executed
after check of the security code, and display data for displaying a
license.
The object of the present invention can be achieved by a security
check method for a CD-ROM disk according to .[.claim 1.]. .Iadd.the
present invention.Iaddend., the method comprising the steps of:
reading data recorded in the boot sector of the CD-ROM disk when
actuated; comparing the disk identifier read from the identifier
region of the boot sector with .[.an.]. .Iadd.a .Iaddend.stored
identifier to check whether or not the read disk identifier is
correct; comparing the security code read from the security region
of the boot sector with a stored security code to check whether or
not the read security code is correct; and executing the program
contained in the security code when the read disk identifier and
the read security code are correct, and displaying a license based
on the display data.
According to the present invention, when actuated, data stored in a
boot sector of the CD-ROM disk is read, a data identifier read from
an identifier region of the boot sector is compared with a stored
disk identifier to judge whether or not the read identifier is
correct, a security code read from a security region of the boot
sector is compared to judge whether or not the read security code
is correct, and when the read disk identifier and the read security
code are judged correct, a program contained in the security code
is executed to display that the disk is duly licensed and
proper.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view showing the CD-ROM disk according to one
embodiment of the present invention;
FIG. 2 is a flow chart (1) of the security check method for the
CD-ROM disk according to the embodiment of the present invention;
and
FIG. 3 is a flow chart (2) of the security check method for the
CD-ROM disk according to the embodiment of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
The CD-ROM disk according to one embodiment of the present
invention will be explained with reference to FIG. 1. FIG. 1(a)
shows a plan view of the CD-ROM disk, and FIG. 1(b) to (d) show a
format of the CD-ROM disk.
As shown in FIG. 1(a), the CD-ROM disk 10 according to this
embodiment has a 120 mm diameter and has a 15 mm-diameter center
hole 12 formed in the center of the CD-ROM disk 10. A boot sector
16 to be first read when actuated is provided on the innermost
track of a recording region with ROM data and audio data recorded
in.
As shown in FIG. 1(b), the boot sector has an area from Logic
Sector Numbers .[.1.]. .Iadd.0 .Iaddend.to 15. A data identifier
and a security code are recorded in the boot sector, i.e., in
plural ones of the sectors of the boot sector in view of possible
recording or read errors. Usually they are recorded in the first
sector of the boot sector having Logic Sector No. 0.
The disk identifier indicates a kind of the CD-ROM disk 10, and as
shown in FIG. 1(c) and is usually recorded in an identifier region
16a at the foremost part of the boot sector 16. In this embodiment,
two kinds of identifiers,
"SEGADISCSYSTEMSM.quadrature..quadrature." and
"SEGABOOTDISC.quadrature..quadrature..quadrature..quadrature."
(.quadrature. represents a space) are used. The former identifier
"SEGADISCSYSTEM.quadrature..quadrature." is a disk identifier to be
used in a CD-ROM disk carrying a game software which ends on the
disk. The latter identifier
"SEGABOOTDISC.quadrature..quadrature..quadrature..quadrature." is a
disk identifier to be used in a CD-ROM disk carrying a game
software which is continued on a plurality of CD-ROM disks, and is
to be recorded in the first one of the CD-ROM disks carrying the
game soft.
The security code indicates that the CD-ROM disk 10 is duly
licensed by a television game device maker. As shown in FIG. 1(c),
the security code is recorded in a security region 16b at a preset
address in the boot sector 16.
As shown in FIG. 1(d), the security code contains a program to be
executed after a checking operation of the security code, color
data indicative of colors of LOGOTYPE to be displayed, LOGOTYPE
pattern data indicative of patterns of LOGOTYPE to be displayed,
message data indicative of a message "PRODUCED BY OR UNDER LICENSE
FROM XXXX KABUSHIKI KAISHA), and sound data indicative of a
licensor television game device maker. This embodiment is
especially characterized in that a program itself to be executed
following a checking operation of the security code is contained in
the security code.
A program involved in this embodiment is executed by a main CPU of
television game device. As shown in FIG. 1(d), the program includes
seven steps.
In the first step, an address the main CPU jumps when the
television game device is reset is set.
In the second step, a sub-CPU provided in the CD-ROM device for the
CD-ROM disk to be mounted on is temporarily paused.
In the third step, contents of the program memory of the sub-CPU
are rewritten in data recorded in the CD-ROM.
In the fourth step, the operation of the sub-CPU which has been
temporarily paused is resumed.
In some television game devices, these second through fourth steps
may be omitted.
In the fifth step, head addresses of data recorded in the CD-ROM
disk are set in a register of the main CPU.
In the sixth step, a required program routine stored in the CD-ROM
device is executed. This program routine performs a resetting
operation, such as license display.
The program routine involved in this embodiment performs the
following resetting operation.
First a vertical interrupt address is set. Next, a sound processor
and a video processor are reset, while a video RAM is cleared, and
ASCII character graphics are set. Then, based on color data stored
in the security code 16b, display colors are set, and based on
LOGOTYPE data in the security code 16b, LOGOTYPE character graphics
are set. Subsequently message data (PRODUCED BY OR UNDER LICENSE
FROM XXXX KABUSHIKI KAISHA) in the security code 16b are displayed
on a television screen, and a LOGOTYPE map is set to display
LOGOTYPE on the television screen. Then, after one second, based on
sound data stored in the security code 16b, sounds indicative of a
licensor television game device maker are outputted, and a LOGOTYPE
mark color is changed, and then the television screen display is
cleared.
Finally in the seventh step, a jump is performed to an application
program, such as a game program.
A CD-ROM disk security check method according to one embodiment of
the present invention will be explained below with reference to
FIGS. 2 and 3.
In the flow charts of FIGS. 2 and 3, Steps 101 to 106 are for
checking the security code by the sub-CPU of the CD-ROM device
provided in the television game device for mounting the CD-ROM
disk. Step 107 and its following steps are for operation by the
main CPU provided in the television gate device.
First it is judged whether or not one piece read from the CD-ROM 10
is a ROM track (Step 101). If it is not a ROM track, it is judged a
musical disk.
It if is judged a ROM track, the first sector of the boot sector 16
is loaded (Step 102). Next, a disk identifier recorded in the
identifier region 16a of the boot sector 16 is compared with a disk
identifier stored in the memory of the CD-ROM device (Step
103).
If it is judged that the recorded identifier does not agree with
the stored identifier, it is judged whether or not all the sectors
of the boot sector 16 have been loaded (Step 104). If all the
sectors of the boot sector 16 have not been loaded, a next load
sector is set (Step 105), and the processing is returned to Step
102. If all the sectors of the boot sector 16 have been loaded to
judge that the recorded identifier does not agree with the stored
identifier, the disk is judged to be a CD-ROM disk but a disk other
than a game disk.
When the recorded identifier agrees with the stored identifier in
Step 103, then a security code recorded in the security region 16a
in the boot sector 16 is compared with the security code stored in
the memory of the CD-ROM device (Step 106). If the recorded
security code agrees with the stored security code, the CD-ROM disk
is judged a duly licensed proper game disk. If the recorded
security code does not agree with the stored security code, the
disk is judged a different disk.
The processing heretofore is the operation of the sub-CPU provided
in the CD-ROM device. This processing is followed by the operation
by the main CPU provided in the television game device.
First, it is judged whether or not the loaded CD-ROM disk 10 is a
game disk (Step 107). If the disk is not a game disk, the operation
for the usual music CD .[.tis.]. .Iadd.is .Iaddend.enabled (Step
108). Incessantly it is judged whether or not the tray of the
CD-ROM device is opened (Step 109), and when it is judged that the
tray is opened, there will be a possibility that the loaded CD-ROM
disk 10 has been replaced, and the processing is returned to Step
101.
In Step 107, when the loaded CD-ROM disk 10 is judged a game disk,
"CD-ROM" is displayed on the television screen (Step 110), and both
the operation of the usual musical CD and the game operation are
enabled (Step 111). It is incessantly judged whether or not the
tray is opened (Step 112), and if the tray is judged opened, there
is a possibility that the CD-ROM disk 10 has been replaced, and the
processing is returned to Step 101.
Subsequently it is judged which has been selected between the usual
musical CD operation and the game operation (Step 113). If the game
operation is selected, Step 114, which will be explained below,
will follow.
First, the security code is loaded from the CD-ROM disk (Step 114).
Then a program contained in the security code starts to be executed
(Step 115).
The first step of the program is executed, and an address for the
main CPU to jump when the television game device is reset is set
(Step 116).
Then, the second step of the program is executed, and the operation
of the sub-CPU provided in the CD-ROM device is temporarily paused
(Step 117).
Next, the third step of the program is executed, and contents of
the program memory of the sub-CPU is rewritten in data recorded in
the CD-ROM disk (Step 118).
Then the fourth step of the program is executed, and the sub-CPU
which has been temporarily paused is resumed (Step 119).
In some television game devices, these steps 117 to 119 can be
skipped.
Then the fifth step of the program is executed, and the head
addresses of data recorded in the CD-ROM disk are set in a register
provided in the main CPU (Step 120).
Next, the sixth step of the program is executed, and a required
program routine stored in the CD-ROM device is executed (Step 121).
In this program routine, resetting operation including the
above-described license display, etc. is performed.
Returning from the program routine stored in the CD-ROM device, the
seventh step of the program is executed to jump to an application
program (Step 122), and the execution of the application program of
a game or others is started, and the security check operation of
the CD-ROM disk is finished.
The present invention is limited to the above-described embodiment
and covers other various modifications. For example, the program
contained in the security code is not limited to the program
involved in the above-described embodiment and may be any kind of
program.
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