Channel control system having device control block and correspon

Details Channel control system having device control block and correspon Channel control system having device control block and correspon

1989-11-08

1991-07-09

Lee, Thomas C.

Boots, shoes, and leggings

3642655, 3642383, 3642601, 364263, G06F 1310, G06F 1130

Patent

active

050310917

ABSTRACT:
A device control word including a channel command part and an I/O command part is prepared in a main storage unit, and sent to a channel unit together. The channel command part has a common format for different types of I/O devices or I/O controllers thereof, while the I/O command part may have a different format for each type of the I/O devices. Thereby, the same channel unit can be used for or connected to different kinds of I/O controllers by simply modifying software in a central processing unit to correspond to respective I/O controllers.

REFERENCES:
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patent: 3898623 (1975-08-01), Cormier
patent: 4053950 (1977-11-01), Bourke et al.
patent: 4495564 (1985-01-01), Draper et al.
patent: 4549263 (1985-10-01), Calder
patent: 4604709 (1986-08-01), Blount et al.
patent: 4750107 (1988-06-01), Ruggert
patent: 4754399 (1988-06-01), Yamamoto et al.
patent: 4901232 (1990-02-01), Harrington et al.

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