Computer with alarm sounding apparatus having selectable output
First Claim
1. A computer having a speaker for outputting one of a plurality of different alarms and a system tone, said computer comprising:
- speaker data generating means for generating a sounding signal for driving said speaker to produce said system tone in accordance with data supplied from a CPU;
alarm sounding condition detecting means for detecting a plurality of different predetermined alarm sounding conditions and outputting one of a plurality of different detection signals for each of said plurality of different predetermined alarm sounding conditions; and
alarm signal outputting means for receiving said one of said plurality of different predetermined alarm sounding detection signals supplied from said alarm sounding condition detecting means and said sounding signal from said speaker data generating means, and outputting said sounding signal from said speaker data generating means to produce said system tone when said one of said plurality of different detection signals is in a first state and outputting one of a plurality of alarm signals for driving said speaker to produce a corresponding one of the plurality of different alarms when said one of said plurality of different detection signals is in a second state.
0 Assignments
0 Petitions
Accused Products
Abstract
When a drop of the voltage of a battery is detected, a detector outputs two kinds of alarm signals in accordance with the degree of voltage drop. Two PALs for generating an alarm signal input the respective alarm signals to a selector. An alarm signal from another PAL which generates an alarm signal in accordance with the state of a panel switch and a sound signal from a speaker data generator which generates various sound signals in accordance with a signal from a CPU are also supplied to the selector. The selector selects one from these signals so as to drive a speaker. Since a means for generating an alarm signal is provided separately from the speaker data generator, an alarm sounding operation is ensured.
24 Citations
15 Claims
-
1. A computer having a speaker for outputting one of a plurality of different alarms and a system tone, said computer comprising:
-
speaker data generating means for generating a sounding signal for driving said speaker to produce said system tone in accordance with data supplied from a CPU; alarm sounding condition detecting means for detecting a plurality of different predetermined alarm sounding conditions and outputting one of a plurality of different detection signals for each of said plurality of different predetermined alarm sounding conditions; and alarm signal outputting means for receiving said one of said plurality of different predetermined alarm sounding detection signals supplied from said alarm sounding condition detecting means and said sounding signal from said speaker data generating means, and outputting said sounding signal from said speaker data generating means to produce said system tone when said one of said plurality of different detection signals is in a first state and outputting one of a plurality of alarm signals for driving said speaker to produce a corresponding one of the plurality of different alarms when said one of said plurality of different detection signals is in a second state. - View Dependent Claims (2)
-
-
3. A computer having a CPU, a battery and a speaker for outputting one of a plurality of different alarms, comprising:
-
a sound signal generator that generates a a plurality of sound signals; a low voltage battery detecting circuit that detects at least one low battery condition and outputs a separate low battery signal for each at least one low battery condition; an open panel detecting circuit that produces an ON/OFF panel signal when a panel of the computer is open and the computer is in an on state; at least one programmable array logic device receiving the ON/OFF panel signal and the at least one low battery signal for each at least one low battery condition, the at least one programmable array logic device outputs a plurality of alarm detection signals, each of the alarm detection signals corresponding to one of the ON/OFF panel signal and the at least one low battery signal; a selector circuit receiving the plurality of alarm detection signals and the plurality of sound signals and outputting an alarm signal comprising one of the plurality of sound signals based on the plurality of alarm detection signals for driving the speaker to produce one of the plurality of different alarms. - View Dependent Claims (4, 5, 6)
-
-
7. A computer speaker controller for controlling a computer speaker, comprising:
-
a detection circuit generating a plurality of detection signals; a sound circuit generating a plurality of sound signals, each of the plurality of sound signals corresponding to one of the plurality of detection signals; a speaker data generator generating a CPU sound signal to produce a system tone based on data supplied by a CPU; and a controller circuit coupled to the detection circuit, the sound circuit and the speaker data generator controlling the computer speaker, the controller circuit driving the computer speaker based on the detection signals to produce one of a plurality of sounds corresponding to each of the plurality of detection signals. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
-
Specification