JPH04130931A - Changing system for memory contents - Google Patents

Abstract

PURPOSE:To simultaneously display and change the much contents of a memory by reading out the memory contents from a specified address only by a fixed range, displaying the read contents on a CRT together with their addresses as a two-dimensional layout, changing the memory display value of a cursor position to an optional value and writing the contents of the layout screen again in the same addresses. CONSTITUTION:A memory contents list display screen 7 is formed and the addresses 8 and values 9 of the memory are displayed on the screen 7. The addresses 8 are displayed in each 16 bytes and the value 9 of one byte is displayed in each line. A memory contents changing part 4 forms a cursor 10 to be displayed on the screen 7. The cursor 10 can be vertically and horizontally moved on the display parts of the values 9 and the changing part 4 overwrites an optional value on the value displayed on the display position of the cursor 10. Plural contents can be overwritten. Then, a memory contents writing part 5 simultaneously write all the values 9 displayed on the screen 7 in the same addresses as the reading addresses of the memory 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for changing memory contents in a computer system.

[Conventional technology]

Conventionally, when changing this type of memory content, there have been two methods: reading and changing only the address part of the memory that you want to change, and writing to the same address again each time. wo
Read and modify memory in short ranges (rd),
There was a method for writing.

[Problem to be solved by the invention]

The above-described conventional method has the drawback that each time the memory is changed, only the address part of the memory to be changed or the memory contents of a short range of 1 byte or 1 word are read and written, so the change process takes time. Furthermore, since the memory contents are displayed in short ranges of one byte or one word, there is a drawback that a large amount of contents cannot be changed at once.

An object of the present invention is to read out a predetermined range of memory contents to be changed from an instruction address and display it on a CRT;
To provide a method for changing memory contents that can overwrite and change the contents of a memory to be changed and then rewrite to the same address.

[Means to solve the problem]

The memory content changing method of the present invention includes, in a computer system, memory content reading means for reading memory content within a predetermined range from a designated address;
The memory content read by the memory content reading means is
a memory content layout section for laying out two-dimensional display together with the designated address on RT;
A memory content changing means for generating a cursor that can be moved to an arbitrary position on a layout screen displayed on the RT and changing a memory display value at a position specified by the cursor to an arbitrary value; and a memory content writing means for writing the content on the layout screen including the content on the layout screen to the address designated at the time of reading.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing the format of memory contents displayed on a CRT, showing one embodiment of the present invention.

When changing the memory contents, when the start address 1 of the memory to be changed is specified, the memory contents reading section 2 reads the contents of a certain range from the memory section 6 starting from the start address 1 of the memory to be changed. In this case, the fixed range is 1 specified by the memory content layout section.
It refers to the range of memory contents that can be displayed on a CRT screen, rather than a short range of bytes or one word. Next, the memory content layout unit 3 creates a memory content list display screen 7 on the CRT (IU not shown) as shown in FIG. 2, and displays the memory address 8 and value 9. On the memory contents list display screen 7, for example, address 8 is displayed every 16 bytes, and value 9 is displayed 1 byte at a time on each line. Next, the memory content changing unit 4 generates a cursor 10 to be displayed on the memory content list display screen 7. The cursor 10 can move the display portion of the value 9 vertically and horizontally, and the memory content changing section 4 overwrites the value 9 displayed at the display position of the cursor 10 with an arbitrary value. Multiple overwritings are possible.Next, the memory content writing section 5 displays the memory content list display screen 7.
All the values 9 displayed above are written at once onto the memory 6 at the same address as when they were read.

Above, we have explained how to simultaneously read and display on the CRT a predetermined range starting from the specified address when specifying the starting address of the memory that you want to change, but it goes without saying that it is also possible to simultaneously read the range before and after the specified address. do not have.

〔Effect of the invention〕

As explained above, when changing memory contents, the present invention reads out a certain range of memory contents from a specified address, displays the layout in two dimensions along with the address on a CRT, and changes the memory display value at the cursor position to an arbitrary value. By changing and writing the contents on the layout screen to the same address again, it is possible to display and change a large amount of memory contents at once, reducing the number of memory reads and writes when changing a large amount of contents. This has the effect of shortening the time required.

Furthermore, since the memory contents before and after the address to be changed can be checked when changing the memory contents, it is possible to reconfirm the changed contents.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing the format of memory contents displayed on a CRT, showing one embodiment of the present invention. 1... Start address of the memory to be changed, 2... Memory content reading part, 3... Memory content layout part, 4... Memory content changing part, 5... Memory content writing part, 6...・Memory section, 7...Memory contents list display screen, 8...Address, 9...Value, 0...Cursor.

Claims (1)

[Claims] In a computer system, memory content reading means reads out memory content within a predetermined range from a specified address, and the memory content read by the memory content reading means is displayed two-dimensionally on a CRT together with the specified address. A memory content layout section that lays out a memory content layout section, and a memory content that generates a cursor that can be moved to an arbitrary position on a layout screen displayed on a CRT, and that changes the memory display value at the position specified by the cursor to an arbitrary value. A method for changing memory contents, comprising: a changing means; and a memory contents writing means for writing contents on a layout screen including the memory change value to an address designated at the time of reading.