JPH01136220A - Data processor - Google Patents

Abstract

PURPOSE:To improve operability by detecting device constituting information by the connecting condition of an expanding part and the connecting condition of the expanding part at a leading time and executing an initializing based on the above-mentioned information. CONSTITUTION:A personal computer is composed of a main body part 10 and an expanding part 20 to be connected to this part 10 freely attachably and detachably. This main body part 10 is provided with an expansion detecting mechanism 19 in addition to a CPU 11 and a memory 12, etc. The expanding part 20 is provided with an expansion informing part 24 together with a CRT controller 21, a CRT 22 and a standard keyboard 23. The CRT controller 21 and the expansion informing mechanism 24 are formed on a printed wiring board and connected to the main body part freely attachably and detachably. Then, the expansion detecting mechanism 19 detects the connection of the expanding part 20. In the memory 12, the device constituting information are stored in a different area to correspond to the presence and absence of the connection in addition to processing data. Thus, after the initialization of the CPU main body, the expanding part 20 is connected and the information at an expanding time are read from the memory 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data processing device such as a personal computer used in the field of information processing.

(Prior Art) A portable personal computer such as a laptop type is equipped with a liquid crystal display device and a small keyboard in the main body for use while being carried, and a CRT display device and a small keyboard when used fixed on a desk or the like. Some devices have a standard keyboard that can be connected to the main body as an extension.

When using an extension part containing such peripheral devices connected to the main body part, it is necessary to change the device configuration each time the device is started up. When used by connecting it to the main body, it is necessary to issue a command to change the configuration of the device each time it is started up, which poses a problem in that the operation becomes complicated.

(Means for Solving the Problems) The data processing device of the present invention stores device configuration information in different areas in the memory corresponding to the connection status of the expansion part, and information about the connection status of the expansion part at startup. By providing the main body with means for performing initialization based on the device configuration information detected and stored in the corresponding area in the memory, it is configured to eliminate the need for complicated device configuration change commands.

Hereinafter, the operation of the present invention will be explained in detail together with examples.

(Embodiment) FIG. 1 is a block diagram showing the configuration of a personal computer according to an embodiment of the present invention.

This personal computer is composed of a main body part 10 and an extension part 20 detachably connected to the main body part 10.

- The main body part 10 includes a CPU II, a memory 12, a liquid crystal display (LCD) controller 13, a keyboard controller 14, a liquid crystal display 15, a small keyboard 16, a video RAM 17, a bus 18, and an expansion detection mechanism 19.
It is equipped with The extended portion 20 is a CRT (cathode ray tube)
Controller 21, CRT 22 and standard keyboard 23
In addition to this, an extended notification section 24 is provided.

The CRT controller 21 and the expansion notification mechanism 24 of the expansion part 20 are formed on a printed wiring board, and can be attached to and removed from the main body part 20 as the box housing the printed wiring board is inserted into and removed from the main body part 20. Connected. The expansion notification mechanism 24 is made up of a protrusion or the like, and when the extension part 200 is connected to the main body part 10, the extension detection mechanism 19 on the main body part side, which is made up of a switch or the like, detects the connection of the extension part 20.

The memory 12 consisting of RAM and ROM includes a CPU
In addition to various processing programs and processing data executed by I, device configuration information is stored in different areas corresponding to whether or not the extension section 20 is connected to the main body section 10. That is, as shown in FIG. 2, the area starting from address (aaa) stores the device configuration information when not expanded, and the area starting from address [bbb) stores the device configuration when expanded. information is stored.

When the personal computer of FIG. 1 is powered on, the CPU II starts startup processing shown in the flowchart of FIG. 3.

First, in the first step 31, the CPU main body is initialized according to an initialization routine stored at a predetermined address in the memory 12. In the next step 32, the output of the expansion detection mechanism 19 is checked to see if the device is expanded. If the device has been expanded by connecting the expansion portion 20 to the main body portion 10, the device configuration information at the time of expansion is read from address (b b b) of the memory 12 in the next step 33, and the CRT controller 21 and the keyboard controller 14 are initialized.

That is, initial settings are performed for the CRT controller 21, including various commands, settings of various operation modes such as transfer byte width and transfer speed from the video RAM 17. Regarding the keyboard controller 14,
Initial settings including selection and designation of input from the standard keyboard 23 are performed.

On the other hand, step 32 indicates that the device has not been expanded.
If so, the process of CPUI 1 proceeds to step 34. In step 34, the non-expansion device configuration information is read from address (aaa) of the memory 12, the LCD controller 13 and the keyboard controller 14 are initialized, and input from the small keyboard 16 is selected.

The case where there is only one type of expansion part configuration has been illustrated above, but if there are many types, the device configuration information at the time of expansion is stored separately in multiple areas of the memory 12 for each type, and The extension notification mechanism 24 may notify what type of extension it is.

In addition, although the configuration in which the expansion notification mechanism 24 is formed on the expansion portion 20 side has been illustrated, this may be omitted and the expansion detection mechanism 19 on the main body portion IO side may be a pressure-sensitive switch, a proximity sensor, etc. that detects the press-fitting of the expansion portion. It is also possible to adopt appropriate means.

(Effects of the Invention) As described above in detail, the data processing device of the present invention has device configuration information stored in different areas in the memory corresponding to the connection status of the extension part, and device configuration information of the extension part at startup. Since the main unit is equipped with a means for detecting the connection status and initializing it based on the device configuration information stored in the corresponding area in the memory, a command to change the device configuration can be input every time the device is started up. This is no longer necessary, and the effect is that the operability is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a personal computer according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a personal computer according to an embodiment of the present invention. FIG. A conceptual diagram explaining how this is done, Figure 3 is the same as Figure 1.
3 is a flowchart illustrating startup processing performed by CPU II of the personal computer shown in the figure. DESCRIPTION OF SYMBOLS 10... Main body part, 11... CPU, 12... Memory, 13... Liquid crystal display controller, 14...
- Keyboard controller, 15... Liquid crystal display device, 16... Small keyboard, 19... Extension detection mechanism, 20... Extension part, 21... CRT controller, 22... CRT, 23.・Standard keyboard, 24
...Extended notification mechanism. Patent applicant: NEC Home Electronics Co., Ltd.

Claims (1)

[Scope of Claims] A data processing device comprising a main body portion including a peripheral device and a corresponding peripheral control device, and an extension portion detachably connected to the main body portion and including a peripheral device and a corresponding peripheral control device. In the main body part, device configuration information is stored in different areas in the memory corresponding to the connection status of the expansion part, and detects the connection status of the expansion part at startup and stores the device configuration information in a corresponding area in the memory. A data processing device comprising: means for initializing based on device configuration information stored in the data processing device.