US5233350A
Expired / Lapsed
US
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Apparatus and method for serial port interfacing
Assignee: KHIM LIOW YUEN
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Filing: 1991-10-21
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Granted: 1993-08-03
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Expires: 2011-10-21
Abstract
Abstract Apparatus 70 interfaces between port 20 of personal computer 10 and peripheral device 40 connectable to port 20. Transmit and receive data signals (TXD, RXD) are transmitted and received between port 20 and device 40 to pass through without substantial modification by apparatus 70. Protocol signals are transmitted by port 20 and processed to provide digital data signals. The protocol signals include a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal, whereby the apparatus processes RTS signal to provide a protocol clock signal and processes DTR signal to provide a protocol data signal. The protocol signals are monitored to identify a protocol signal pattern. Upon identifying such pattern within a particular protocol signal, a particular digital data signal is extracted from the protocol signal. The extracted digital data signal may then be converted to analog signals which are applicable to produce sound from speaker 80.
Inventors
- 👤 Liow Y. Khim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
An apparatus for interfacing between a serial port of a computer and a device connectable to said serial port, said apparatus comprising: first means coupled to said serial port and said device, for receiving and transmitting transmit and receive data signals between said serial port and said device without reception and transmission substantially modifying said transmit and receive data signals; and second means, coupled to said first means, for receiving protocol signals transmitted from said serial port, said second means monitoring said protocol signals for a signature pattern, and upon detection of said signature pattern, said second means extracting data signals from said protocol signals and outputting said extracted data signals.
Claim 2
Independent Claim
111 words
An apparatus for interfacing between a serial port of a computer and a device connectable to said serial port, said apparatus comprising: first means coupled to said serial port and said device, for receiving and transmitting transmit and receive data signals between said serial port and said device without reception and transmission substantially modifying said transmit and receive data signals; and second means, coupled to said first means, for receiving protocol signals transmitted from said serial port, said second means monitoring said protocol signals for a signature pattern, and upon detection of said signature pattern, said second means extracting data signals from said protocol signals and outputting said extracted data signals.
Claim 3
Dependent Claim
49 words
The apparatus of claim 1, wherein said protocol signals comprise a Request to Send (RTS) signal and a Data Terminal Ready (DTR) signal; and wherein said second means processes said RTS signal to provide a protocol clock signal and processes said DTR signal to provide a protocol data signal.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1, further comprising a third means coupled to said second means for converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device.
Claim 5
Independent Claim
180 words
An apparatus for interfacing between a serial port of a computer and a device connectable to said serial port, said apparatus comprising: first means coupled to said serial port and said device, for receiving and transmitting transmit and receive data signals between said serial port and said device without reception and transmission substantially modifying said transmit and receive data signals; second means coupled to said first means, for receiving protocol signals transmitted from said serial port, said second means monitoring said protocol signals for a signature pattern, and upon detection of said signature pattern, said second means extracting data signals from said protocol signals and outputting said extracted data signals; third means coupled to said second means for converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device; wherein said protocol signals comprise a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal; and wherein said second means processes said RTS signal to provide a protocol clock signal and processes said DTR signal to provide a protocol data signal.
Claim 6
Independent Claim
180 words
An apparatus for interfacing between a serial port of a computer and a device connectable to said serial port, said apparatus comprising: first means coupled to said serial port and said device, for receiving and transmitting transmit and receive data signals between said serial port and said device without reception and transmission substantially modifying said transmit and receive data signals; second means coupled to said first means, for receiving protocol signals transmitted from said serial port, said second means monitoring said protocol signals for a signature pattern, and upon detection of said signature pattern, said second means extracting data signals from said protocol signals and outputting said extracted data signals; third means coupled to said second means for converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device; wherein said protocol signals comprise a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal; and wherein said second means processes said RTS signal to provide a protocol clock signal and processes said DTR signal to provide a protocol data signal.
Claim 7
Independent Claim
90 words
A method for interfacing between a serial port of a computer and a device connectable to said serial port, said method comprising the steps of: receiving and transmitting transmit and receive data signals between said serial port and said device without substantially modifying said transmit and receive data signals; receiving protocol signals transmitted from said serial port; monitoring said protocol signals for a signature pattern; upon detection of said signature pattern within a particular monitored protocol signal, extracting data signals from said protocol signals; and outputting said extracted data signals.
Claim 8
Independent Claim
90 words
A method for interfacing between a serial port of a computer and a device connectable to said serial port, said method comprising the steps of: receiving and transmitting transmit and receive data signals between said serial port and said device without substantially modifying said transmit and receive data signals; receiving protocol signals transmitted from said serial port; monitoring said protocol signals for a signature pattern; upon detection of said signature pattern within a particular monitored protocol signal, extracting data signals from said protocol signals; and outputting said extracted data signals.
Claim 9
Dependent Claim
49 words
The method of claim 5, wherein said received protocol signals comprise a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal and wherein said RTS signal is processed to provide a protocol clock signal and said DTR signal is processed to provide a protocol data signal.
Claim 10
Dependent Claim
28 words
The method of claim 5, further comprising the step of converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device.
Claim 11
Independent Claim
152 words
A method for interfacing between a serial port of a computer and a device connectable to said serial port, said method comprising the steps of: receiving and transmitting transmit and receive data signals between said serial port and said device without substantially modifying said transmit and receive data signals; receiving protocol signals transmitted from said serial port; monitoring said protocol signals for a signature pattern; upon detection of said signature pattern within a particular monitored protocol signal, extracting data signals from said protocol signals; outputting said extracted data signals; and converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device; wherein said received protocol signals comprise a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal and wherein said RTS signal is processed to provide a protocol clock signal and said DTR signal is processed to provide a protocol data signal.
Claim 12
Independent Claim
152 words
A method for interfacing between a serial port of a computer and a device connectable to said serial port, said method comprising the steps of: receiving and transmitting transmit and receive data signals between said serial port and said device without substantially modifying said transmit and receive data signals; receiving protocol signals transmitted from said serial port; monitoring said protocol signals for a signature pattern; upon detection of said signature pattern within a particular monitored protocol signal, extracting data signals from said protocol signals; outputting said extracted data signals; and converting said extracted data signals to analog signals which are applicable to produce sound from a speaker device; wherein said received protocol signals comprise a Request To Send (RTS) signal and a Data Terminal Ready (DTR) signal and wherein said RTS signal is processed to provide a protocol clock signal and said DTR signal is processed to provide a protocol data signal.
References Cited (Backward Citations)
US4812847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |