JPS5852755A - Scan-in system - Google Patents

Abstract

PURPOSE:To facilitate scan-in operation by varying the status value of a latch through the scan-in operation so as to concide the varied status value of the latch with the status value of the latch of a data processor. CONSTITUTION:The high-order digit side of a scan address register 9 specify a latch in an LSI. When a scan-in setting signal of 1 is inputted to the distributor 16 of an LSI13-1, the signal of the output line of the distributor 16 specified by the low-order digit side of the register 9 has logic 1. Set terminals of latches 10-0, 10-1, and 10-2 are connected to corresponding output lines of the distributor 16, and are set when the corresponding output lines of the distributor 16 have logic 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a data processing system in which the names of signals such as scanned out latches and their status values are displayed on a display. This relates to a scan-in method in which when a state value is rewritten using a keyboard or the like, the state value tube of the corresponding latch is also changed.

A computer system is known that is equipped with a main body computer and a service processor, and in which the service processor can scan out the state of the latches and registers of the main body computer, as well as scan in arbitrary values to the latches and registers. be. The scanout data retrieved from the main system computer is edited by the service processor, and the signal name of the latch or register and its state value are displayed in pairs on the display of the main system computer. If it were possible to forcibly set the latches that make up the control circuit or set the error latch to generate a pseudo-failure sound, it would be effective for testing and diagnosing the control circuit of the host computer, but conventionally this was not possible. To do this, it is necessary to clip the set or reset terminal of the host computer's latch.However, with this method, it is inconvenient to first check the mounting position where you want to set or reset, and then physically clip it. Furthermore, as circuits become more integrated into LSIs, some latches that cannot be clipped also appear.

The present invention is based on the above consideration.

In a data processing system having a first data processing device and a second data processing device that can scan in and out of the first data processing device, the scan-in operation in the second data processing device can be easily performed. The purpose of this paper is to provide a scan-in method that can be used in many cases. Therefore, the scan-in method of the present invention includes a first data processing device and a second data processing device having a function of scanning out and scanning in the latch of the first data processing device. In the data processing system, the second data processing device edits and displays the status of the first data processing device or on the screen of its own display device, and the state value of the latch on the screen is changed by an operator. changing the state value of the latch of the first data processing device by scan-in so that the changed state value of the latch on one screen matches the state value of the latch of the first data processing device. The present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an overview of a data processing system to which the present invention is applied, FIG. 2 is a diagram showing an overview of a scan-out circuit, and FIG. 3 is a diagram showing an overview of a scan-in circuit. Diagram showing,! Figure 4 is a diagram showing an example of a scan screen, Figure 5 is a diagram showing the display format and scante address of file 3,
Figure 6 is a diagram showing the latch of the main system device, and Figure 7 is a diagram explaining changes on the screen when scan-in is performed.
FIG. 8 is a flowchart of the scan-in operation performed by the service processor.

In Figure 1, l indicates the main system device, 2 indicates the interface circuit, 3 indicates the file, 4 indicates the memory, 5 indicates the central processing unit of the service processor, 6 indicates the display controller, 7 indicates the display, and 8 indicates the keyboard. ing.

In FIG. 1, a service processor tt is shown below the one-dot chain line, and the service number processor includes the interface circuit 2S file 3, memory '4, and central processing unit 5.
．． It includes a display controller 6, a display 7, a keyboard, etc. When the service processor is set to 0 scan mode, it has the function of scanning out the state of the latches of the main body system device 1 and the function of scanning any value into the latches of the main body system device 1. , based on the scan address extracted from file 3, the state of the latch is read from the main body system and taken into the service processor. The captured scanout data is edited by the service processor and displayed on display 7. The operator looks at the scanout screen on the display 7, uses the cursor to point out all the scanout data that he wants to correct, and when he changes this scanout data to the desired value, the service processor displays the status value of the corresponding latch on the screen. Change to the changed value above 0 Figure 2 explains the outline of the scanout circuit, in which 9 is the scan address register % 10-0 to 10-2 are latches, 1
1 and 12 indicate selectors, beams 13-1 and 13-2, and SI, respectively. Note that regarding scan-out, the LSs 113-1 and 13-2 have similar configurations.

The scan address register 9 specifies a latch, and the upper side of the scan address register 9 indicates an LSI address, and the lower side of the scan address register 9 indicates an address within the FiLSI.

The lower side of scan address register 9 is selector 1
1 of control information, and the selector 11 selects any one of the latches 10-0 to 10-2 according to this value. The upper side of the scan address register 9 becomes control information for the selector 12, and the selector 12
-1 and scanout data read from L8113-2. Selector 1
The scanout data output from 2 is sent to the service
sent to the processor.

FIG. 3 shows an outline of the scan-in circuit. In FIG. 3, 15 and 16' indicate distributors, respectively. Regarding scan-in, LS113-1
and 13-2 have similar configurations.

The upper side of the scan address register 9 specifies L8I', and the lower side specifies a latch in the LSI. Inset signal is input. When the scan address is set in the scan-address register 9 and the scan-in set signal becomes logic "1", the signal on the output line of the distributor 15 determined by the upper side of the scan address register 9 becomes logic "1". ”. The output of the distributor 15 is input as a scan-in set signal to the distributor 16 in each LSI.
The input side of the distributor 16 is the scan-address register 9.
and the corresponding output line of the distributor 15. Now, if the "moon scan-in set signal" is input to the distributor 16 of LS113-1, the distributor 16 determined by the lower side of the scan address register 9
0 latch 10-0 whose output line signal is set to logic "1"
．． Each set terminal of 10-1 and 10-2 is connected to a corresponding output line of the distributor 16, and is set when the corresponding output line of the distributor 16 becomes logic "1". Note that a similar circuit is provided for scan-in reset.

Figure 4 is a diagram showing an example of a scan screen.As mentioned earlier, the scanout data is displayed on the display 7.
The signal name and its status value are displayed on the display screen.

As shown in FIG. 6, for each of the plurality of latches 13, LATCHI, LATCH2...
signal names such as REGIS are given for registers.
In the scan screen of FIG. 4 where the signal name TER is given, it is "rREGIsTER4", but this is Toshi in 16-way display, and the contents of the register are rolooJ in binary representation.

Figure 5 shows the file display format and scan/
It is a figure which shows an address. File 3 has a display format area and a scan address area. The display format area is divided into lines, each line corresponding to a line on the display screen. In the 81st line to each Nth line in the display 7-ormat area, rLATcH4=
J (however, 4-1.2...N) is entered, and "rREGIsTERMARO" is entered in the N+1st line. The scan address area is divided into multiple lines. The scan address of LATCH is written in the first line, and the REGI address is written in the N+1st to N+4th lines.
The scan address of bits 0 to 3 of STER is written. When scanout is commanded,
First, scanout is performed according to the scan address in the first line of the scan data area, and the scanout data and the display format in the first line of the display format area are synthesized, and the scanout data is "0"
When , rLATcH1=o J is displayed on the first line of the display screen. Next, w in the scan address area
Scan-out is performed according to the address during scanning in the i2 line, and the scan-out data and the display format in the second line of the display format area are combined and the resulting fct is displayed on the second line of the display screen. . Thereafter, scan-out is performed in the same manner.

FIG. 7 is a diagram illustrating all the changes on the screen when a full scan is performed. To scan in the REGISTERO value t″7#, operate the keyboard 8t to move the cursor below the display data and input 71 from the keyboard 8 as shown in FIG. 7(A).0 This state DeENT
When you press the ER key to start scan-in, the service processor retrieves the scan number address of REGISTER bits 0 to 3 from file 3 and writes it to REGISTER.
Set rOJ by latch t scan-in reset of bit 0 of GISTER, and set "1" to pit bit 3 by setting scan-in Φ.

When the scan-in operation is completed, the service processor scans out the latch W4 again.

Display on screen. In this example, the GCREGISTERO value is #7'' as shown in Figure 7 (b).
It is confirmed that the t-yang-in has been performed.

FIG. 8 is a flowchart of the scan-in operation performed by the service processor. The file 3 is managed by pages, and each page is provided with a display format area and a scan address area. FIG. 5 shows one page of it.

Furthermore, control information indicating how many pages are being displayed is stored in the memory 4 of the service processor. As mentioned earlier, when the ENTER key is pressed after manual data is written at the cursor position on one screen, the service processor reads the cursor position and input data. Next, check how many pages of data are currently being displayed based on the control information on the memory 4 ◇ After finding all relevant pages, select the scan address by positioning the cursor on the background. Search for gold.

After determining the scan address, scan in is performed using the scan address and input data.

As is clear from the above description, according to the present invention, scan-in is performed using a scan screen that shows the latch signal name and its status value, so scan-in is easier and easier than in the conventional method. You can get the effect that you can do it.

[Brief explanation of the drawing]

FIG. 1 shows an overview of a data processing system to which the present invention is applied!
! Figure 2 is a diagram showing an outline of the scan-out circuit, Figure 3 is a diagram showing an overview of the scan-in circuit, Figure 4 is a diagram showing an example of the scan screen, Figure 5 is a diagram showing an example of the scan screen, and Figure 5 is a diagram showing an outline of the scan-in circuit.
6 is a diagram showing the latch of the main body system device, and FIG. 7 is a diagram illustrating changes on the screen when scan-in is performed.
FIG. 8 is a 70-chart of scan-in operations performed in the service processor. 1... Main body system device, 2... Interface circuit, 3
...File, 4...Memory, 5...Service
central processing unit of processor, 6... display controller, 7... display, 8... middle-board %9... scanout fist address register, 1
0-0 to 1O-2...Latch, 11 and 12...
Selector, 13-1 and 13-2...LSI, 15 and 1
6...Distributor. Patent Applicant Fujitsu Ltd. Representative Patent Attorney Kyotani Yotsube 1 Figure 4-Figure Yaotoku

Claims (1)

[Claims] In a data processing system comprising a first data processing device and a second data processing device having a function of scanning out and scanning in a latch of the first data processing device, The data processing device edits and displays the state of the first data processing device on the screen of its own display device, and displays information on the 1!1 screen indicating that the state value of the latch on the screen has been changed by the operator. The state value of the latch of the first data processing device is changed by scan-in so that the changed state value of the latch matches the state value of the latch of the first data processing device. The scan-in method is characterized by: