JPH04525A - Bus mouse interface circuit for data processor - Google Patents

Abstract

PURPOSE:To improve the operability of this bus mouse interface circuit and to effectively utilze software resources by providing the interface circuit with a selector, a register to be controlled software and an interruption generating circuit. CONSTITUTION:When a serial mouse interruption signal 13 is generated from a serial mouse control circuit 6 in order to detect the moving amount of a serial mouse 8, the signal 13 is transmitted to a CPU 1 through an interruption controller 9. Software receives the data from the mouse 8 within a serial mouse interruption processing routine, converts the received data into bus mouse data and writes the converted data in a data replacing register 2. At the end of the interruption processing routine, an interruption generating command is issued to an interruption generating circuit 11. The bus-mouse interface circuit is driven by the command as if an interruption is generated from the bus mouse and the same processing as that to be executed when the bus mouse is connected to the bus mouse software can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is utilized for connecting a bus mouse in a data processing device. The present invention relates to an interface circuit for converting mouse data of a human powered device of a personal computer or workstation.

〔overview〕

The present invention converts data received from a serial mouse into bus mouse data in a bus mouse interface circuit of a data processing device, operates the bus mouse as if an interrupt has occurred, and connects the bus mouse to bus mouse software. By executing the same processing as when using a serial mouse, it is possible to use bus mouse software while using a serial mouse.

[Conventional technology]

Conventionally, a mouse that has been equipped as a standard feature in personal computers has been fixed to a mouse interface circuit for either a serial mouse or a bus mouse, and bus mouse software has not been available for devices equipped with a serial mouse.

[Problem that the invention seeks to solve]

The conventional mouse interface circuit described above is fixed to the serial mouse or bus mouse method in various personal computers and workstations, so it is possible to integrate a personal computer or workstation with a bus mouse interface into a device that uses a serial mouse. If you want to use a computer, you have to have two types of mouse interfaces, and depending on the software you use, you have to switch mouse interfaces, which means you have to change cables.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and it is an object of the present invention to provide an interface circuit that allows bus mouse software to be used while using a serial mouse.

[Means for solving problems]

The present invention provides a data processing device including a bus mouse control circuit connected to a data bus connected to a central processing unit and controlling transmission of data from a bus mouse connected via a bus mouse connector to the data bus. The bus mouse interface circuit includes a serial mouse control circuit for controlling the transmission of data from a serial mouse connected via a serial mouse connector to the data bus, the data being received from the serial mouse and converted for bus mouse use. a data reassignment register that holds the stored data;
A data switching selector that switches and connects the data assignment register and the output from the bus mouse to the bus mouse control circuit, and an interrupt generation circuit that is connected to the data bus and generates an interrupt generation command under the control of software. It is characterized by

an interrupt reassignment selector that switches and connects outputs from the bus mouse control circuit and the interrupt generation circuit; and an interrupt controller that sends an interrupt request signal to the central processing unit based on the outputs of the interrupt reassignment selector and the bus mouse control circuit. The central processing unit is preferably provided in a personal computer or a workstation.

[Effect]

When a serial mouse interrupt signal is generated while the data assignment selector is switched to the data assignment register side and the interrupt assignment selector is switched to the interrupt generation circuit side, the signal is transmitted to the central processing unit (hereinafter referred to as CPU). It receives data from the mouse in the serial mouse interrupt processing routine, converts it to bus mouse data and writes it to the data reassignment register, and generates an interrupt generation command. This interrupt generation command causes the device to operate as if an interrupt had been generated from the bus mouse.

This allows the same processing as when a bus mouse is connected, improves operability, and makes effective use of software resources.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

The figure is a block diagram showing the configuration of an embodiment of the present invention.

The embodiment of the present invention has a data bus 12 connected to the CPU 1.
and a bus mouse control circuit 3 that controls the transmission of data from a bus mouse (not shown) connected to the data bus 12 via a bus mouse connector 5, and further connected via a serial mouse connector 7. a serial mouse control circuit 6 that controls the transmission of data from the serial mouse 8 to the data bus I2; a data reassignment register 2 that holds data received from the serial mouse 8 and converted for bus mouse use; Data reassignment register 2
and a data switching selector 4 that switches and connects the output from the bus mouse to the bus mouse control circuit 3, and a data bus 12.
an interrupt generation circuit 11 that is connected to and generates an interrupt generation command under software control; an interrupt reassignment selector 10 that switches and connects the outputs from the bus mouse control circuit 3 and the interrupt generation circuit 11; An interrupt controller 9 is provided which sends an interrupt request signal to the CPU 1 based on the output of the bus mouse control circuit 3.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

When using serial mouse software, the serial mouse 8 is connected to the serial mouse connector 7. When using the bus mouse software in such a state, first switch the data reassignment selector 4 to the data reassignment register 2 side, and then switch the interrupt reassignment selector 10 to the data reassignment register 2 side.
is switched to the interrupt generation circuit II side.

Here, when a serial mouse interrupt signal 13 is generated from the serial mouse control circuit 6 to detect the movement amount of the serial mouse 8, the CP
The signal is transmitted to the UI.

The software receives data from the serial mouse 8 within the interrupt processing routine for the serial mouse, converts it into data for the bus mouse, and writes it into the data reassignment register 2. Thereafter, at the end of the interrupt processing routine, an interrupt generation command is issued to the interrupt generation circuit 11. This interrupt generation command operates as if an interrupt has been generated from a bus mouse (not shown), allowing the bus mouse software to execute the same processing as when a bus mouse is connected. The bus mouse connector 5 is provided for full compatibility with software that does not operate using the circuit according to the invention.

〔Effect of the invention〕

As explained above, according to the present invention, by providing a selector, a register that can be controlled by software, and an interrupt generation circuit, it is possible to use bus mouse software while using a serial mouse, which improves imitability. This has the effect that scales and software resources can be used effectively.

[Brief explanation of drawings]

The figure is a block diagram showing the configuration of an embodiment of the present invention. 1...CPU, 2...Data reassignment register, 3.
... Bus mouse control circuit, 4... Data exchange selector, 5... Bus mouse connector, 6... Serial mouse control circuit, 7... Serial mouse connector,
°Serial mouse, 9...Interrupt controller, 10
... Interrupt replacement selector, 11... Interrupt generation circuit, 12... Data bus, 13... Serial mouse interrupt signal, 14... Bus mouse interrupt signal, 15.
...Interrupt request signal.

Claims (1)

[Claims] 1. A bus mouse control circuit connected to a data bus connected to a central processing unit and controlling transmission of data from a bus mouse connected via a bus mouse connector to the data bus. In a bus mouse interface circuit of a data processing device, a serial mouse control circuit is provided for controlling the transmission of data from a serial mouse connected via a serial mouse connector to the data bus, and the bus mouse a data switching register that holds data converted for use with the bus; a data switching selector that switches and connects the data switching register and the output from the bus mouse to the bus mouse control circuit; and a software controller connected to the data bus. 1. A bus mouse interface circuit for a data processing device, comprising: an interrupt generation circuit that generates an interrupt generation command under control. 2. An interrupt reassignment selector that switches and connects the outputs from the bus mouse control circuit and the interrupt generation circuit, and sends an interrupt request signal to the central processing unit by the outputs of the interrupt reassignment selector and the bus mouse control circuit. 2. The bus mouse interface circuit for a data processing device according to claim 1, further comprising an interrupt controller. 3. The bus mouse interface circuit for a data processing device according to claim 1, wherein said central processing unit is included in a personal computer or a workstation.