公开(公告)号：AU535607B2

公开(公告)日：1984-03-29

申请号：AU6342480

申请日：1980-10-16

Applicant: IBM

Inventor： EDSTROM GENE HAROLD ,  PAULSEN PAUL HOWARD

IPC: G06F11/08 ,  G06F13/42 ,  G06F3/00 ,  G06F13/00 ,  H04L25/38

公开(公告)号：DE2237672A1

公开(公告)日：1973-02-15

申请号：DE2237672

申请日：1972-07-31

Applicant: IBM

Inventor： EDSTROM GENE HAROLD

IPC: G06F11/22 ,  G06F11/267 ,  G06F13/00 ,  G06F11/04

Abstract: Diagnostics in a peripheral subsystem for a data processing system are performed on a concurrent basis with other programs in the data processing system. The peripheral subsystem has capabilities of generating indications for the data processing system representative of operational conditions that could be encountered; the data processing system is programmed to respond to said indications for diagnosing the operational capabilities of the connected peripheral subsystem. Included in the diagnostics are interface checking between the subsystem and the rest of the data processing system, device status, capability of stacking status, capability of handling nonstackable status, verifying enable/disable operation, and checking device busy status and the like.

公开(公告)号：DE3062549D1

公开(公告)日：1983-05-05

申请号：DE3062549

申请日：1980-10-15

Applicant: IBM

Inventor： EDSTROM GENE HAROLD ,  PAULSEN PAUL HOWARD

IPC: G06F11/08 ,  G06F13/42 ,  G06F3/04

公开(公告)号：DE2239163A1

公开(公告)日：1973-02-22

申请号：DE2239163

申请日：1972-08-09

Applicant: IBM

Inventor： EDSTROM GENE HAROLD ,  ELWELL RUSSELL MERRITT ,  IRWIN JOHN WILLIAM

IPC: G06F11/00 ,  G06F11/14 ,  G06F13/00 ,  G06F13/38 ,  G06F15/16 ,  G06F3/04

Abstract: Data processing peripheral subsystems are connectable to two different types of data processing systems, each having different capabilities. For example, one data processing system Type 1 has certain error recovery procedures which are greater and more effective than those available for Type 2. The peripheral subsystem detects the type of data processing system to which it is attached and adjusts its operational procedures for emulating the operation of a Type 2 data processing system to the operational capabilities of the Type 1 data processing system without internal changes within the data processing system. The peripheral subsystem is further adapted to operate in a degraded mode with a data processing system of either type when the situation demands it.

公开(公告)号：DE2208474A1

公开(公告)日：1973-01-11

申请号：DE2208474

申请日：1972-02-23

Applicant: IBM

Inventor： EDSTROM GENE HAROLD ,  LUTTER EDWARD PETER

IPC: G01B21/06 ,  G11B15/02 ,  G11B15/46 ,  G11B27/13 ,  G11B27/36

Abstract: Displacement between two signals on a record media is precisely measured by counting the number of capstan tachometer signals occurring between the two signals. This count is time metered per tachometer cycle to calculate an average velocity. In addition, elapsed times between immediately adjacent tachometer signal changes and the signals are measured. The average velocity per tachometer cycle is then multiplied by the total number of tachometer cycles and those portions of a tachometer cycle occurring adjacent the signals. With the known distance per tachometer cycle, the total elapsed time is a precise indication of the distance between the two signals. This method is also used for measuring media slip. Upon occurrence of a first signal, the media is stopped. After stopping, the media is started, all the while measuring the distance the media is moved. Distance measured at a constant velocity is then compared with the latter measurement to indicate slip.