JPH0486928U - - Google Patents
Info
- Publication number
- JPH0486928U JPH0486928U JP12810190U JP12810190U JPH0486928U JP H0486928 U JPH0486928 U JP H0486928U JP 12810190 U JP12810190 U JP 12810190U JP 12810190 U JP12810190 U JP 12810190U JP H0486928 U JPH0486928 U JP H0486928U
- Authority
- JP
- Japan
- Prior art keywords
- relay
- scsi
- terminating resistor
- scsi bus
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 101100284507 Schizosaccharomyces pombe (strain 972 / ATCC 24843) hdd1 gene Proteins 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Communication Control (AREA)
Description
第１図は本考案の一実施例の構成を示す図、第
２図は第１図の装置を用いて終端抵抗の着脱を行
う際の手順（動作）を示すフローチヤート、第３
図は従来例の構成を示す図である。
１０ａ，１０ｂ，１０ｃ……ＩＤ送信部、２０
ａ，２０ｂ，２０ｃ……リレー制御部、３０……
ＳＣＳＩコントローラ、４０……ＳＣＳＩバス、
５０……ＣＰＵ、６０……ＣＲＴ、７０……キー
ボード、８０，８１……ＳＣＳＩ装置、８２……
ホストＣＰＵ装置、ＨＤＤ１，ＨＤＤ２……補助
記憶装置、Ｔ１，Ｔ２，Ｔ３……終端抵抗。
FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a flowchart showing the procedure (operation) for attaching and removing a terminating resistor using the device shown in FIG. 1, and FIG.
The figure shows the configuration of a conventional example. 10a, 10b, 10c...ID transmitter, 20
a, 20b, 20c...Relay control section, 30...
SCSI controller, 40...SCSI bus,
50... CPU, 60... CRT, 70... Keyboard, 80, 81... SCSI device, 82...
Host CPU device, HDD1, HDD2...Auxiliary storage device, T1, T2, T3...Terminal resistor.
Claims (1)
抗の着脱制御を行う機構であつて、 複数のＳＣＳＩ装置８０，８１とホストＣＰＵ
装置８２とがＳＣＳＩバス４０により結ばれてお
り、 各ＳＣＳＩ装置８０，８１は、 自装置が前記ＳＣＳＩバスと電気的に接続され
ているか否かを示す認識信号を送出するＩＤ送信
部１０と、 リレー制御部２０と、 終端抵抗Ｔと、 前記リレー制御部により切換えが制御され、Ｉ
Ｄ送信部およびリレー制御部とＳＣＳＩバスとの
接続を切換える第１のリレーＡｎと、 前記リレー制御部により切換えが制御され、前
記終端抵抗と第１のスイツチの一端との接続を制
御する第２のリレーＢｎとを有しており、 また、前記ホストＣＰＵ装置８２は、 各ＳＣＳＩ装置８０，８１から送信されてきた
ＩＤ信号を受け、各ＳＣＳＩ装置とＳＣＳＩバス
との接続状態を把握するとともに、この把握した
情報に基づいて、ＳＣＳＩ装置に第１または第２
のリレーの制御信号を送出する終端抵抗の一元管
理手段５０を有しており、 終端抵抗を取付ける場合、前記ホストＣＰＵ装
置８２はまず、各ＳＣＳＩ装置から送られてきた
ＩＤ信号を受信し、その後、終端抵抗を取付ける
べきＳＣＳＩ装置のリレー制御部に第２のリレー
の切換え制御信号を送出して終端抵抗を第１のリ
レーの一端に接続させ、この後、該リレー制御部
に指示し、第１のリレーの終端抵抗に接続されて
いる前記一端をＳＣＳＩバスに接続するように該
第１のリレーを切換え、これにより、ＳＣＳＩバ
スシステムを完成させることを特徴とするＳＣＳ
Ｉバスシステムにおける終端抵抗の着脱制御機構
。[Scope of Utility Model Registration Claim] A mechanism for controlling the attachment and detachment of a terminating resistor in a system using a SCSI bus, which connects a plurality of SCSI devices 80, 81 and a host CPU.
A device 82 is connected to the SCSI bus 40, and each SCSI device 80, 81 includes an ID transmitter 10 that sends out a recognition signal indicating whether or not the device is electrically connected to the SCSI bus; Switching is controlled by the relay control section 20, the terminating resistor T, and the relay control section, and the I
A first relay An that switches the connection between the D transmitting section and the relay control section and the SCSI bus; and a second relay An whose switching is controlled by the relay control section and which controls the connection between the terminating resistor and one end of the first switch. The host CPU device 82 receives the ID signal transmitted from each SCSI device 80, 81, and grasps the connection status between each SCSI device and the SCSI bus. Based on this information, the SCSI device is configured to
The host CPU device 82 has a terminating resistor unified management means 50 that sends out control signals for the relays. When installing a terminating resistor, the host CPU device 82 first receives an ID signal sent from each SCSI device, and then , sends a second relay switching control signal to the relay control unit of the SCSI device to which the terminating resistor is to be attached to connect the terminating resistor to one end of the first relay, and then instructs the relay control unit to connect the terminating resistor to one end of the first relay. An SCS characterized in that the first relay is switched so that the one end connected to the terminating resistor of the first relay is connected to the SCSI bus, thereby completing the SCSI bus system.
A control mechanism for attaching and detaching a terminating resistor in an I-bus system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12810190U JPH0486928U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12810190U JPH0486928U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486928U true JPH0486928U (en) | 1992-07-28 |
Family
ID=31875575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12810190U Pending JPH0486928U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486928U (en) |
-
1990
- 1990-11-30 JP JP12810190U patent/JPH0486928U/ja active Pending
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