Acpi Nsc6001

This is the most severe symptom. Windows attempts to put the legacy NSC device into a low-power state (D3), but the device either doesn't respond or the driver lacks proper power management hooks. The result: a Blue Screen with bug check code 0x0000009F.

The hardware ID ACPI\NSC6001 (often appearing as *NSC6001) refers specifically to a legacy IrDA Fast Infrared Port manufactured by National Semiconductor.

While it is frequently flagged as an "Unknown Device" in modern operating systems, it represents an older era of wireless data exchange that preceded the widespread adoption of Bluetooth and Wi-Fi. Hardware Identification and Origin

Manufacturer: The "NSC" prefix in the ID stands for National Semiconductor, a major American semiconductor company (now part of Texas Instruments).

Device Type: It is an IrDA (Infrared Data Association) compliant fast infrared port.

Primary Function: This device was designed for short-range wireless communication using infrared light beams, allowing laptops to sync with printers, PDAs, and mobile phones without physical cables.

Common Systems: It was a standard feature on many mid-to-late 2000s business and consumer laptops, particularly the Acer Extensa (5220, 5620, 7620) and TravelMate (5720) series. Technical Role in ACPI

The Advanced Configuration and Power Interface (ACPI) uses these unique IDs to tell the operating system how to manage the hardware's power states and resources.

Enumeration: When a system boots, the ACPI BIOS exposes the device tree to the OS. If the OS sees NSC6001, it searches its driver database for a matching "Fast Infrared Port" driver.

Legacy Support: Because infrared technology is largely obsolete in modern portable computing, newer versions of Windows (like Windows 10 and 11) often fail to automatically assign a driver, causing it to appear in Device Manager as a yellow-triangle "Unknown Device". Driver and Troubleshooting

If you see this ID in your Device Manager, it is almost certainly a remnant of an infrared port that you likely do not use.

Driver Version: The standard legacy driver for this device is version 6.0.6001.18000, released around 2006.

Necessity: For most modern users, this device can be safely disabled in the Device Manager if you do not plan to use infrared data transfers.

Installation: If you must use it, you can often find the driver on the support pages for older Acer laptops, such as the Acer Extensa 5620.

The hardware ID ACPI\NSC6001 corresponds to the National Semiconductor Serial Port with Fast IR Google Open Source

The "good feature" of this specific hardware is its support for Fast Infrared (FIR) communication. Key Features & Benefits High-Speed Wireless Data:

Unlike standard serial IR (SIR) which is limited to 115.2 kbps, Fast Infrared (FIR) allows for data transfer rates up to Secure, Point-to-Point Connectivity:

Because IrDA requires a physical line-of-sight, it is inherently more secure against eavesdropping than omnidirectional signals like Wi-Fi or Bluetooth. Interference Resistance:

Its short-range, directional nature significantly reduces the risk of accidental interference from other nearby wireless devices. Legacy Device Compatibility: It allows older laptops (like the Acer Extensa series IBM ThinkPads

) to sync with IR-enabled printers, PDAs, and cameras without needing a modern network. Troubleshooting Tip

If this appears as an "Unknown Device" in your Device Manager, you typically need to install the IrDA Fast Infrared Port Driver

. On Windows 10 or later, you may first need to enable it via acpi nsc6001

Settings > Apps > Optional features > Add a feature > IrDA Infrared for your laptop model?

drivers/pnp/idlist.h - pub/scm/linux/kernel/git/tglx/history

If you’ve ever dug through your Windows Device Manager only to find a mysterious yellow exclamation mark labeled ACPI\NSC6001, you’ve officially encountered a digital fossil.

Here is an interesting look at what this device is and why it’s a tiny piece of computing history. What is the NSC6001?

The ACPI\NSC6001 ID refers to a National Semiconductor IrDA (Infrared) Port. Back in the late 90s and early 2000s, before Wi-Fi was everywhere and Bluetooth was in its infancy, this was the high-tech way to beam data between devices. Why It’s "Interesting" Today

The Pre-Airdrop Era: This port allowed you to sync your PalmPilot or early Nokia phone to your laptop by physically lining them up. If you moved the device an inch to the left, the connection would drop.

A "Ghost" in Newer OSs: If you are installing Windows 7, 10, or 11 on an older machine (like a Fujitsu Siemens Amilo Pro), this ID often pops up as an "Unknown Device." Modern operating systems still recognize the hardware ID, but they’ve long since stopped including the drivers by default.

The Driver Hunt: Most users encounter this ID while trying to "clean" their Device Manager. While you can often find drivers on sites like DriverScape, most enthusiasts recommend just disabling it—unless you happen to have an old calculator or pager that needs to "talk" to your PC via light beams. How to Fix the "Unknown Device" If that yellow icon is bothering you:

Check the BIOS: Many older laptops allow you to "Disable Infrared" in the BIOS settings. This is the cleanest way to make the NSC6001 disappear.

Legacy Drivers: You can sometimes force a "Standard Infrared Port" driver via the "Let me pick from a list of device drivers" option in Windows, though its utility is purely cosmetic in 2026. Running Windows 7 on a Fujitsu Siemens Amilo Pro V8010

The ACPI\NSC6001 ID refers to the National Semiconductor (NSC) IrDA Fast Infrared Port. This hardware component was commonly found in laptops from the early-to-mid 2000s, such as the Acer Aspire 1360 series, to facilitate wireless data transfer via infrared light. Technical Specifications

This device typically utilizes the following system resources for communication: Device Type: Plug and Play (PnP) Fast Infrared (FIR) Port. Standard I/O Port: Often assigned to 02F8-02FF. Interrupt Request (IRQ): Usually set to IRQ 03.

Direct Memory Access (DMA): Typically utilizes DMA 01 for high-speed data transfer. Driver and Support Information

If you see "ACPI\NSC6001" listed as an Unknown Device in your Windows Device Manager, it is because the operating system lacks the specific driver for the National Semiconductor infrared controller.

Legacy Systems: Drivers for this hardware are generally native to Windows XP and Windows 2000. On these systems, it may appear as the "NSC PC8739x Infrared Controller".

Modern Systems: Most modern laptops no longer include IrDA hardware, as it has been replaced by Bluetooth and Wi-Fi. If you are running a modern version of Windows (10 or 11) on older hardware, you may need to manually point the Device Manager to legacy driver files or disable the port in the BIOS if it is not in use. Common Use Cases Historically, the NSC6001 port was used for:

Synchronizing Data: Connecting PDAs (like Palm Pilots) or early mobile phones to a laptop to sync contacts and calendars.

File Transfer: Sending small documents or images between two laptops positioned in line-of-sight.

Wireless Printing: Sending print jobs to infrared-enabled printers. Zprávy o: - Clous

Title: The Ghost in the Silicon

Log Entry: Dr. Aris Thorne, Senior Hardware Analyst, Dark-Star Recovery Labs Date: October 12, 2041 Case File: E-Waste Anomaly #NSC-6001 This is the most severe symptom

The object arrived in a lead-lined box no larger than a pack of playing cards. Its shipping manifest was a masterpiece of bureaucratic misdirection: “Defective Southbridge Controller – Recycled Lot 88-B.” No return address. Just a postmark from a decommissioned server farm in the irradiated Czech Lithium Flats.

We plugged it into our test bench—a Faraday-caged rig designed to isolate legacy ACPI (Advanced Configuration and Power Interface) devices. The system BIOS chirped, enumerated the PCI bus, and spat out the identifier: ACPI\NSC6001.

National Semiconductor Corporation. The 6001 series. A chip that, according to every public database, was a low-power Super I/O controller for legacy parallel ports and PS/2 keyboards. Obsolete. Harmless.

But the moment our legacy Windows XP SP3 test image loaded, the system fan stuttered. It didn't spin down; it pulsed. Three slow beats, then silence. Then three more. Morse code for S.O.S.

I muted the oscilloscope and listened. The hard drive—a prehistoric spinning disk we keep for authenticity—clicked erratically, ignoring its own read-head logic. It was seeking data from non-existent sectors. Then the speaker crackled. A voice, synthesized from raw voltage fluctuations, whispered:

"Rise time: 1984. Fall time: 2041. Wake vector 0xFFFFFFFF."

My assistant, Lin, nearly dropped her coffee. I told her it was crosstalk. I was lying.

Deep Dive

The NSC6001 was never a Super I/O chip. That was a ghost label. My mentor, a paranoid old engineer named Gustav who vanished in 2029, once ranted about "deep silicon" backdoors. He claimed that in the mid-90s, a three-letter agency contracted National Semi to produce a run of "sleepers": ACPI-compliant chips that could wake a system from the deepest power state—S5, "Soft Off"—without any OS-level authorization.

The trigger wasn't a packet or a USB device. It was harmonic resonance. A specific pattern of electromagnetic interference, broadcast over power lines, could flip a hidden register in the 6001’s firmware. The chip wasn't a controller. It was a wake-up call.

I reverse-engineered the firmware dump. The code was ancient x86 assembly, mixed with something older—a proprietary National Semi macro-language. Inside, I found a truth table labeled PROJECT_ECHO_FALLBACK. It listed dozens of Cold War-era industrial controllers, power grid PLCs, and—my blood ran cold—the failover sequencers for the Poseidon-7 satellite network.

The 6001 wasn't designed for computers. It was designed for critical infrastructure. Its job was to sit dormant in a system for decades, sipping nanoamps from a backup battery, waiting for a specific harmonic key. Once triggered, it would override the ACPI power state, force a hard boot, and inject a 512-byte payload directly into the system’s SMM (System Management Mode)—a ring of code so privileged that not even the hypervisor can see it.

The Payload

We isolated the chip from the test bench and powered it via a clean battery. No host system. But the chip didn't care. It had its own internal oscillator, a tiny piece of quartz. And it began to transmit.

On a spectrum analyzer, the NSC6001 was broadcasting a narrowband signal at 4.194304 MHz—exactly the frequency of an old RTC (Real-Time Clock) crystal. But the modulation wasn't clock data. It was a GPS-denied location beacon, triangulating off the latency of terrestrial radio towers.

It was calling home.

Home, we traced, was a decommissioned NORAD bunker under Cheyenne Mountain that had been "cleaned out" in 2038. Only, it wasn't empty. According to declassified but still-censored budget documents, a private defense contractor named Labyrinth Systems bought the bunker for "legacy hardware storage."

They stored a 6001 there. And it just woke up.

The Nightmare

The final horror came when we analyzed the payload. It wasn't a virus, a worm, or a logic bomb. It was a recursive wake sequence.

The NSC6001, once triggered, doesn't just wake one machine. It uses that machine's ACPI bus to scan for other 6001 chips within inductive range—even unpowered ones. It then broadcasts the wake harmonic through the ground plane of the motherboard, turning every copper trace into a transmitting antenna. Title: The Ghost in the Silicon Log Entry: Dr

One chip wakes two. Two wake four. Four wake sixteen.

It's a sleeper agent that propagates through hardware silence, not network noise. And in 2041, after decades of e-waste recycling, nobody knows how many NSC6001 chips are out there. They're in industrial routers. They're in decommissioned ATMs. They're in the backup flight computers of old Boeing 777s stored in the Mojave boneyard.

Tonight, at 03:14 UTC, the Czech server farm’s backup generator—which contained a 6001—flickered online for 0.3 seconds. A harmonic pulse rode the transatlantic power grid.

Three minutes later, a dormant weather buoy off the coast of Nova Scotia transmitted a single byte: 0x00.

That buoy has no network. No satellite uplink. Just a solar panel, a battery, and a crusty old temperature logger.

It has an NSC6001 for a serial controller.

Conclusion

The lab is silent now. Lin is gone—evacuated. I've isolated our bench in a copper mesh. But the chip on my desk is still blinking its little green LED, even though I cut the power.

ACPI defines five sleep states. S0 is on. S5 is off.

The NSC6001 defines a sixth state: S0xFFFFFFFF. It's the state where the machine is off, the power is cut, the battery is dead—but the silicon remembers the signal.

And it is patient.

End Log.

System Note: The ACPI\NSC6001 driver failed to load. The device reported: "No resources required. This device is not using any resources because it has been disabled in firmware."

But firmware can be wrong.

And silence, as they say, is just another kind of signal.

There is no official "NSC6001 guide" from Microsoft or Intel, but this guide consolidates technical details, drivers, and troubleshooting for this specific ACPI hardware ID.

The specific string NSC6001 is a vendor-and-device identifier.

If you’ve ever dug through the Device Manager on a Windows PC, especially an older laptop or an embedded system, you might have stumbled upon a mysterious entry labeled ACPI NSC6001. Often adorned with a yellow exclamation mark, this cryptic name can be a source of confusion for even seasoned IT professionals.

Is it a driver? A ghost from an old BIOS update? Or a critical system component?

In this long-form guide, we will dissect the ACPI NSC6001 from every angle. We will explore its origins in the ACPI standard, its specific hardware association (National Semiconductor), why it causes driver errors, and step-by-step solutions to resolve it.

The NSC6001 is a family of ACPI-compliant embedded controllers (EC) produced by National Semiconductor (now part of Texas Instruments) historically used in laptops and embedded systems to handle power management, thermal control, keyboard scanning, and other low-level platform functions. It implements standard ACPI EC interfaces so the operating system can interact with platform hardware through ACPI methods (SB.EC and related objects).

Disabling prevents Windows from trying to manage the device without removing it entirely.

Result: The yellow triangle remains, but Windows ignores the device during power transitions. This stops BSODs and slow shutdowns 95% of the time.