Method and system for interfacing PC to CD-ROM drives

Details Method and system for interfacing PC to CD-ROM drives Method and system for interfacing PC to CD-ROM drives

1992-10-08

1995-09-05

Harvey, Jack B.

Boots, shoes, and leggings

395848, 395438, 364DIG1, 3642353, 3642361, 3642362, 3642433, G06F 1300

Patent

active

054487005

ABSTRACT:
A method and a system for interfacing a PC to CD-ROM drives wherein the PC as a host can perform a different job while one of the CD-ROM drives selected as a target prepares for data to be transmitted to the host PC, thereby resulting in an increase in the interfacing efficiency. The method comprises a target select step of allowing the host to select one of the CD-ROM drives as the target at a bus free state, a lo command generate step of generating from the host a command to be executed by the target, a bus free step of, if the generated command from the host contains a disconnect command, transmitting disconnect status data from the target to the host and then making an interface bus through which the host is connected to the target the free state so that the host can perform a different job while the target prepares for data to be transmitted based on the generated command from the host, a reselect step of informing the host that the target completes the preparation for the data to be transmitted so that the host reselects the same target, a data transmit step of, if the same target is reselected by the host at the reselect step or if there is no disconnect command at the command generate step, transmitting the data prepared based on the generated command from the host from the target to the host, and a step of transmitting status data.

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