JPS61187070A - Control method of background music performance - Google Patents

Abstract

PURPOSE:To execute the instruction of another BASIC language while playing a background music up to an octuple chord by allocating a part of a memory map, which a BASIC inprinter uses, for the data buffer of every output port for music performance. CONSTITUTION:When the background music is not performed, the BASIC inprinter 11 uses a BASIC area as shown in figure (a). When the performance of the background music is required, the BASIC inprinter sends an instruction CLEAR of the BASIC language to a read only memory to reserve a part of the BASIC area for the data buffer as shown in figure (b). The area reserved for the data buffer is assigned to individual output ports by an instruction PLAY ALLOC as shown in figure (c). Thus, the performance of the background music is commanded by an instruction PLAY, and score data is designated by the same instruction PLAY.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to music performance by a personal computer. The present invention relates to a music performance control method for executing other commands in the BASIC language while playing music in the BASIC language.

〔overview〕

Control a small computer using BASIC language,
In music performance control that plays music based on the control output, the data buffer for each music output port is set to an arbitrary size on the interface board linked to the BASIC inkblitter of the processing device, and interrupt control is performed. This allows other data processing using the BASIC language to be performed at the same time as music performance.

[Conventional technology]

Background music may be played in synchronization with an information processing device, for example, while drawing a figure on a television screen. In such a case, if a personal computer is used as the information processing device and the BASIC language is used to control the drawing of figures, the output control of the background music is also performed using the BASIC language.
It is necessary to use IC language.

Conventional music performance using the BASIC language has been realized by storing data in a buffer and sequentially processing the data using interrupts from hardware.

[Problem that the invention seeks to solve]

However, since the size of this data buffer is fixed and small, it is difficult to control the execution of other commands in the BASIC language while playing music in the BASIC language as background music.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a processing method that solves the above-mentioned drawbacks and makes it possible to execute commands in other BASIC languages while playing music.

[Means for solving problems]

The present invention provides a control method for a computer device that performs music performance using the BASIC language.
A part of the area where ASIC language translation data is stored is allocated in advance to an arbitrary size as a data buffer memory for music performance, and the area allocated to this data buffer memory is further divided and allocated to each output port, and the period It is characterized by controlling music performance through standard interrupt control.

[Effect]

By allocating a part of the memory map used by the BASIC interpreter to a data buffer for each output port for music performance, and controlling the size of this data buffer so that it can be specified arbitrarily, background music up to large chords can be created. It becomes possible to use a control system that executes commands in other BASIC languages while playing the ``BASIC''.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. In FIG. 1, the personal computer body 1 includes a BA
SIC interpreter 11 is included, but this BAS
The IC interpreter cannot execute instructions for playing music.

Reference numeral 2 denotes an interface port which, when connected to the personal computer main body 1, is linked to a BASIC interpreter and can execute instructions for playing music. Read-only memory 21 of interface board 2
A program for controlling an interrupt control circuit 22 and an audio control circuit 23 that interface with the BASIC interpreter 11 is incorporated in the computer. When the background music is being played, the interrupt control circuit 22 on the interface board 2 interrupts the personal computer every 2 m5ec and passes musical score data to the audio control circuit 23. interface board 2
The audio control circuit 23 performs control for outputting musical score data to the audio device 3.

Here, a feature of the present invention is that control is performed so that a data buffer for music score data can be secured to an arbitrary size. How this control is implemented will be explained with reference to the memory map diagram shown in FIG.

In FIG. 2, BASIC Inkbrita uses the BASIC area as shown in (a) when background music is not played. When background music is required, BAS
The IC ink interpreter sends a CLEAR command in the BASIC language to the read-only memory, and the read-only memory reserves a part of the BASIC area for a data buffer as shown in (b) using a program installed in advance. Next, in the same manner, the PLAY ALLOC command is used to allocate the data buffer area secured above to each output port as shown in (C). To play background music, after securing a data buffer for each output port as described above, a PLAY command is used to instruct the performance of the background music, and the same PLAY command is used to specify musical score data. In this way, the background music begins to play.

As explained above, since the size of the data buffer can be specified arbitrarily, the time during which background music is played can be easily adjusted, making it possible to synchronize with other processing using BASIC language data such as drawing figures. Compared to the conventional method,
It's much easier to do.

Generally, the melody of background music is harmonic or rhythmic, so if you have eight sets of output ports as shown in Figure 2 (C), you can play melodies up to large chords. can.

〔Effect of the invention〕

According to the present invention, as explained above, there is an effect that the performance of background music can be controlled much more easily than the conventional music performance control method.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a memory map explanatory diagram showing a method of securing data buffers according to the above embodiment. DESCRIPTION OF SYMBOLS 1...Personal computer, 2...Interface board, 3...Audio device, 11...BA
SIC interpreter, 21...read-only memory, 2
2... Interrupt control circuit, 23... Audio control circuit. Block configuration diagram M1 of non-implemented example

Claims (1)

[Claims] (1) In a method for controlling a computer device that performs music performance using the BASIC language, a part of the area of memory in which BASIC language translation data is stored included in a BASIC interpreter that translates the BASIC language is set in advance for music performance. Background music characterized in that an arbitrary size is allocated as a data buffer memory, the area allocated to the data buffer memory is further divided and allocated to each output port, and music performance is controlled by periodic interrupt control. How to control the performance.