JPH0458765U

JPH0458765U -

Info

Publication number: JPH0458765U
Application number: JP10190390U
Authority: JP
Priority date: 1990-09-28
Filing date: 1990-09-28
Publication date: 1992-05-20

Description

[Brief explanation of the drawing]

第１図は本考案のＳＣＳＩホストアダプタ回路
の一実施例の構成を機能ブロツクを用いて示す図
、第２図はＳＣＳＩホストアダプタ回路の実際の
構成例を示す図、第３図はタイマを構成するテー
ブル方式のフオーマツトを示す図、第４図は本実
施例の一連の動作の概要を示すフローチヤート、
第５図はタイムアウト検出動作（タイムベース割
込み処理）の手順を示すフローチヤート、第６図
はフエイズ対応処理の内容を示すフローチヤート
、第７図はホストアダプタ回路を用いて複数の入
出力装置とＩ／Ｏを行うシステムの概要を示す図
である。１……ＳＣＳＩホストアダプタ回路、２……タ
イマ、３……タイマ設定手段、４……デバイス特
定手段、５……タイマ決定手段、６……タイムア
ウト検出手段、１０，２０……ＳＣＳＩデバイス
（入出力装置）、３０……ＳＣＳＩバス、４０…
…ＳＣＳＩバス制御部、５０……タイムベース、
６０……ＣＰＵ、７０……データバス、８０……
アドレスバス、９０……チヤンネルバス制御部、
１００……チヤンネルバス、１１０……ホストコ
ンピユータ、ａ〜ｎ……タイマ要素。 Fig. 1 is a diagram showing the configuration of an embodiment of the SCSI host adapter circuit of the present invention using functional blocks, Fig. 2 is a diagram showing an actual configuration example of the SCSI host adapter circuit, and Fig. 3 is a diagram configuring a timer. FIG. 4 is a flowchart showing an overview of a series of operations in this embodiment.
Figure 5 is a flowchart showing the procedure of timeout detection operation (time base interrupt processing), Figure 6 is a flowchart showing the details of phase response processing, and Figure 7 is a flowchart showing the procedure for timeout detection operation (time base interrupt processing). 1 is a diagram showing an overview of a system that performs I/O. 1...SCSI host adapter circuit, 2...Timer, 3...Timer setting means, 4...Device specifying means, 5...Timer determining means, 6...Timeout detection means, 10, 20...SCSI device (input) output device), 30...SCSI bus, 40...
...SCSI bus control unit, 50...time base,
60...CPU, 70...Data bus, 80...
Address bus, 90...Channel bus control unit,
100... Channel bus, 110... Host computer, a to n... Timer element.

Claims

[Claims for Utility Model Registration] Host computer 110 and multiple devices 1
0 and 20 via the SCSI bus 30, and includes a plurality of timer elements a to n provided corresponding to each of the plurality of devices 10 and 20. and a timer setting means 3 for setting an abnormality detection timeout value in each of the timer elements a to n of the timer means 2 according to the processing speed of the plurality of devices 10 and 20, and a device using a SCSI bus. a device specifying means 4 for detecting the device specifying means; a timer determining means 5 for determining the timer elements a to n to be operated based on the detection result of the device specifying means; and a timer determining means 5 for determining the timer elements a to n to be operated based on the detection result of the device specifying means; When it works and starts counting time,
and a timeout detection means 6 for detecting a match between the count value and the abnormality detection timeout value set by the timer setting means 3, and notifying the host computer 110 of a timeout error if they match; A SCSI host adapter circuit characterized in that, when the SCSI bus 30 is in use, the timer determining means 5 operates only the timer elements a to n corresponding to the device using the bus.