Claims
- 1. A CD-ROM apparatus comprising an IDE interface, wherein a hard disk unit and said CD-ROM apparatus are connected in cascade by a master and slave device with an IDE interface of a personal computer, and wherein said CD-ROM apparatus is controlled by a CD-ROM software driver switching a drive selection bit in the IDE interface so that said CD-ROM apparatus is selected by switching the drive selection bit only, independently from a BIOS of the personal computer.
- 2. A personal computer system, comprising:an IDE interface provided in a personal computer; an IDE BUS connected to said IDE interface of said personal computer; a CD-ROM apparatus containing an IDE interface which can be directly connected to said IDE interface of said personal computer through said IDE BUS; and a hard disk having an IDE interface which also can be directly connected to said IDE interface of said personal computer through said IDE BUS; wherein said CD-ROM apparatus and hard disk unit are connected in cascade by a master and slave device with said IDE interface of said personal computer, and wherein said CD-ROM apparatus is selected by switching only a drive selection bit in the IDE interface by a CD-ROM driver independently from a BIOS of the personal computer system.
- 3. A personal computer system comprising:a CPU; a BUS controller connected to said CPU; a BUS connected to said BUS controller; a computer IDE interface connected to said BUS; an IDE BUS connected to said computer IDE interface; a CD-ROM apparatus; a CD-ROM IDE interface contained in said CD-ROM apparatus and connected to said IDE BUS; a hard disk connected to said IDE BUS in cascade with said CD-ROM apparatus; a 1-bit drive selection bit in said computer IDE interface; and a driver for CD-ROM, wherein said CD-ROM apparatus is selected by switching only said 1-bit drive selection bit by said driver for CD-ROM, independently from a BIOS of the personal computer system; whereby connection of said CD-ROM apparatus to the personal computer system is simplified.
- 4. A personal computer system comprising:a CPU (2); a BUS controller (5) connected to said CPU (2); an BUS (6) connected to said BUS controller (5); a computer IDE interface (7) having a slave or master partition connected to said BUS (6); an IDE BUS (9) connected to said computer IDE interface (7); a CD-ROM apparatus (15) capable of connecting to the slave or master partition of said computer IDE interface (7) through said IDE BUS (9); a CD-ROM IDE interface (15a) contained in said CD-ROM apparatus (15) and connected to said IDE BUS (9); a hard disk device (8) capable of connecting to the master or master partition of said computer IDE interface (7) through said IDE BUS (9) in cascade with said CD-ROM apparatus (15); a 1-bit drive selection bit register (18) in said computer IDE interface (7); and a CD-ROM driver program, wherein said CD-ROM apparatus (15) is selectably connected to the slave or master partition of the computer IDE interface (7) according to a logic state of said 1-bit drive selection bit register (18) controlled by said CD-ROM driver program independently from a BIOS of the personal computer, whereby connection of said CD-ROM apparatus to the personal computer system is simplified by eliminating the need for an interface card connector (12) and an interface cable (14).
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-041032 |
Jul 1993 |
JP |
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CROSS REFERENCE TO RELATED PATENT APPLICATIONS
This application is a continuation-in-part of U.S. patent application Ser. No. 08/985,584, filed Dec. 5, 1997; which is a continuation of U.S. patent application Ser. No. 08/276,440, filed Jul. 18, 1994 now abandoned; which claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 5-041032, filed Jul. 28, 1993, and all being incorporated by reference herein for all purposes.
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Foreign Referenced Citations (1)
Number |
Date |
Country |
10-124444 |
May 1998 |
JP |
Non-Patent Literature Citations (1)
Entry |
“An IDE device Configuration Scheme with Reset Signal”, IBM RD v42 n417 01-99 article 417108. |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/276440 |
Jul 1994 |
US |
Child |
08/985584 |
|
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/985584 |
Dec 1997 |
US |
Child |
09/545488 |
|
US |