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- PCI-to-ISA Bus Conversion: Provides a direct interface between a PCI slot and an ISA AT bus, allowing ISA cards to function within a PCI-based host system.
- I/O Address Space Assignment: The system relies on the PC BIOS to automatically assign I/O address space to the ISA bus, ensuring seamless integration without manual configuration.
- IRQ-Level Support: Supports one IRQ line within the extension, enabling interrupt-driven communication for compatible ISA devices.
- No Memory or DMA Support: The system is designed for I/O-mapped devices only; memory-mapped operations and DMA transfers are not supported.
- Compact Dual-Card Design: Consists of a PCI interface card and an ISA expansion card connected via a shielded cable, allowing flexible installation within or outside the host chassis.
- High-Quality Shielded Cable: Includes a 96-pin shielded cable (1 meter in length) to ensure signal integrity and minimize electromagnetic interference between the PCI and ISA interfaces.
- Industrial Reliability: Engineered for industrial and embedded applications where legacy ISA devices must be maintained or integrated into newer PCI-based systems.
- Plug-and-Play BIOS Integration: Utilizes standard BIOS-level resource allocation, reducing the need for custom drivers or manual configuration.
- I/O Address Space Assignment: The system relies on the PC BIOS to automatically assign I/O address space to the ISA bus, ensuring seamless integration without manual configuration.
- IRQ-Level Support: Supports one IRQ line within the extension, enabling interrupt-driven communication for compatible ISA devices.
- No Memory or DMA Support: The system is designed for I/O-mapped devices only; memory-mapped operations and DMA transfers are not supported.
- Compact Dual-Card Design: Consists of a PCI interface card and an ISA expansion card connected via a shielded cable, allowing flexible installation within or outside the host chassis.
- High-Quality Shielded Cable: Includes a 96-pin shielded cable (1 meter in length) to ensure signal integrity and minimize electromagnetic interference between the PCI and ISA interfaces.
- Industrial Reliability: Engineered for industrial and embedded applications where legacy ISA devices must be maintained or integrated into newer PCI-based systems.
- Plug-and-Play BIOS Integration: Utilizes standard BIOS-level resource allocation, reducing the need for custom drivers or manual configuration.
1. Product Overview
Product Name: PCI Bus to ISA AT Bus Expansion System
Model: BUF-PCI(PC)
Series: BUF-PCI Series
Article Number: BUF-PCI(PC)
Manufacturer: Contec Co., Ltd.
The Contec BUF-PCI(PC) is a specialized hardware interface designed to extend the functionality of modern PCI-based computer systems by providing connectivity to legacy ISA AT bus devices. This expansion system enables users to integrate and operate ISA-based peripheral boards within a PCI environment, ensuring continued use of existing industrial or laboratory equipment that relies on the ISA bus standard. The BUF-PCI(PC) serves as a bridge between the PCI bus architecture and the ISA AT bus, maintaining compatibility at the I/O address and interrupt (IRQ) levels while omitting direct memory and DMA support.
2. Key Features
- PCI-to-ISA Bus Conversion: Provides a direct interface between a PCI slot and an ISA AT bus, allowing ISA cards to function within a PCI-based host system.
- I/O Address Space Assignment: The system relies on the PC BIOS to automatically assign I/O address space to the ISA bus, ensuring seamless integration without manual configuration.
- IRQ-Level Support: Supports one IRQ line within the extension, enabling interrupt-driven communication for compatible ISA devices.
- No Memory or DMA Support: The system is designed for I/O-mapped devices only; memory-mapped operations and DMA transfers are not supported.
- Compact Dual-Card Design: Consists of a PCI interface card and an ISA expansion card connected via a shielded cable, allowing flexible installation within or outside the host chassis.
- High-Quality Shielded Cable: Includes a 96-pin shielded cable (1 meter in length) to ensure signal integrity and minimize electromagnetic interference between the PCI and ISA interfaces.
- Industrial Reliability: Engineered for industrial and embedded applications where legacy ISA devices must be maintained or integrated into newer PCI-based systems.
- Plug-and-Play BIOS Integration: Utilizes standard BIOS-level resource allocation, reducing the need for custom drivers or manual configuration.
3. Technical Specifications
- PCI Interface Card Dimensions: 120 mm (W) × 107 mm (D)
- ISA Interface Card Dimensions: 160 mm (W) × 122 mm (D)
- Cable: 96-pin shielded cable, 1 meter in length
- Bus Standards:
- Host Side: PCI bus (Peripheral Component Interconnect)
- Expansion Side: ISA AT bus (Industry Standard Architecture)
- I/O Address Space: Assigned automatically by PC BIOS
- Memory Space: Not supported
- IRQ Support: One IRQ line available within the extension
- DMA Support: Not supported
- Material: High-quality PCB with gold-plated edge connectors and EMI-shielded cable assembly
- Operating Environment: Designed for standard PC operating conditions (typical 0–50°C, non-condensing humidity)
- Weight: Approximately 200–300 g combined (PCI + ISA cards and cable)
- Connector Type: 96-pin high-density shielded connector for interconnection between PCI and ISA boards
4. Functionality
The BUF-PCI(PC) functions as a transparent bridge that allows a PCI-based host computer to communicate with ISA bus peripherals. The system consists of two main components: a PCI interface card installed in the host computer’s PCI slot, and an ISA interface card that provides the physical ISA bus slots for legacy expansion boards. These two cards are linked via a 96-pin shielded cable, which transmits control, address, and data signals between the PCI and ISA buses.
When the system is powered on, the PC BIOS detects the PCI card and assigns I/O address space to the ISA bus extension. This automatic configuration enables the connected ISA devices to appear as standard I/O-mapped peripherals to the operating system. The BUF-PCI(PC) supports one IRQ line, allowing interrupt-driven devices to function properly. However, because memory and DMA transfers are not supported, the system is best suited for ISA devices that rely solely on I/O-mapped communication.
Typical Use Cases and Applications:
- Integration of legacy ISA-based industrial control boards into modern PCI systems
- Retrofitting older measurement, data acquisition, or automation equipment
- Maintaining compatibility with specialized ISA hardware in laboratory or production environments
- Supporting long-term maintenance of systems where ISA peripherals remain critical to operations
Compatibility:
- Compatible with standard PCI bus architectures (32-bit, 33 MHz)
- Supports ISA AT bus devices that operate within standard I/O address and IRQ configurations
- Works with most PC BIOS implementations that support automatic I/O resource allocation
5. Components & Accessories
Included Items:
- 1 × PCI Interface Card (120 × 107 mm)
- 1 × ISA Interface Card (160 × 122 mm)
- 1 × 96-pin Shielded Interconnect Cable (1 m length)
- 1 × User Documentation (installation and configuration guide)
Optional Accessories (if available):
- Extended-length shielded cables for remote ISA chassis installation
- Mounting brackets or enclosures for external ISA card housing
- Replacement interconnect cables
Connectors:
- PCI Card: Standard PCI edge connector for host interface
- ISA Card: Standard ISA AT bus slot(s) for peripheral connection
- Interconnect: 96-pin shielded connector for signal transmission between PCI and ISA cards
6. Installation & Setup
Requirements:
- Available PCI slot in the host computer
- Compatible ISA device(s) for connection to the ISA expansion card
- Adequate internal or external space for mounting both cards and routing the interconnect cable
Installation Procedure:
1. Power off the host computer and disconnect it from the power source.
2. Insert the PCI interface card into an available PCI slot on the motherboard.
3. Mount the ISA interface card in a suitable location (either within the same chassis or in an external enclosure).
4. Connect the PCI and ISA cards using the provided 96-pin shielded cable, ensuring secure and correct orientation.
5. Power on the system; the PC BIOS will automatically detect the PCI card and assign I/O address space to the ISA bus.
6. Install the ISA peripheral card(s) into the ISA interface card’s slot(s).
7. Verify device recognition and functionality through the operating system or diagnostic utilities.
Configuration:
- No manual jumper or switch settings are typically required; configuration is handled by the BIOS.
- Users may need to verify IRQ assignments to avoid conflicts with other system devices.
Mounting Options:
- Internal mounting within a PC chassis (if space allows)
- External mounting using an expansion chassis or rackmount enclosure
7. Performance & Capabilities
- Bus Speed: Operates at standard PCI bus frequency (33 MHz) for host communication; ISA bus operates at 8 MHz nominal.
- Data Throughput: Limited by ISA bus bandwidth; suitable for low- to moderate-speed I/O operations.
- Latency: Minimal additional latency introduced by the bridge, sufficient for typical control and monitoring applications.
- Capacity: Supports one or more ISA devices depending on the configuration of the ISA interface card.
- Efficiency: Optimized for stable and reliable I/O communication; not intended for high-throughput or memory-intensive applications.
- Limitations:
- No support for memory-mapped ISA devices
- No DMA channel support
- Limited to one IRQ line within the extension
- Dependent on BIOS-level resource allocation
Despite these limitations, the BUF-PCI(PC) provides a robust and practical solution for extending the operational life of ISA-based hardware in modern computing environments.
8. Standards & Compliance
- Bus Standards:
- PCI Local Bus Specification (Revision 2.2 or compatible)
- ISA AT Bus Standard (Industry Standard Architecture)
- Electrical Compliance: Meets standard PC interface voltage and signaling requirements (3.3V/5V tolerant as applicable)
- EMI/EMC: Shielded cable design minimizes electromagnetic interference; compliant with general PC system EMC standards
- Safety and Quality: Manufactured under Contec’s quality management system, adhering to industrial-grade reliability standards
- Regulatory Compliance:
- CE marking (if applicable)
- RoHS compliance for hazardous substance reduction
- Conforms to standard PC hardware safety and environmental directives
9. Additional Information
Warranty:
Typically covered by Contec’s standard limited warranty (duration varies by region and distributor), which includes repair or replacement for manufacturing defects under normal operating conditions.
Technical Support:
Contec provides comprehensive technical support, including installation guidance, troubleshooting assistance, and product documentation. Support resources may include downloadable manuals, FAQs, and firmware updates (if applicable).
Maintenance:
- Periodic inspection of cable connections and connectors is recommended to ensure signal integrity.
- Avoid excessive bending or stress on the shielded cable.
- Keep connectors free from dust and contaminants.
Firmware/Software Updates:
The BUF-PCI(PC) operates primarily at the hardware and BIOS level and does not require dedicated firmware or driver updates. However, users should ensure that their system BIOS and operating system are up to date for optimal compatibility.
Service Life and Reliability:
Designed for long-term industrial use, the BUF-PCI(PC) offers stable performance and mechanical durability. The shielded cable and robust PCB construction contribute to extended operational life in demanding environments.
Documentation and Resources:
- Product datasheet and installation manual available from Contec’s official website
- Application notes for integrating ISA devices into PCI systems
- Technical reference for supported I/O address and IRQ configurations
Summary
The Contec BUF-PCI(PC) PCI Bus to ISA AT Bus Expansion System is a professional-grade interface solution that bridges the gap between modern PCI-based computing platforms and legacy ISA hardware. With automatic BIOS-based I/O address assignment, single IRQ support, and a high-quality shielded interconnect cable, it provides a reliable and efficient means of maintaining compatibility with older ISA devices. Although it does not support memory or DMA operations, its robust design and straightforward installation make it ideal for industrial, laboratory, and embedded applications where legacy hardware integration is essential.
By combining proven ISA technology with modern PCI infrastructure, the BUF-PCI(PC) ensures that critical legacy systems can continue to operate seamlessly within contemporary computing environments, preserving both functionality and investment value.
Product Name: PCI Bus to ISA AT Bus Expansion System
Model: BUF-PCI(PC)
Series: BUF-PCI Series
Article Number: BUF-PCI(PC)
Manufacturer: Contec Co., Ltd.
The Contec BUF-PCI(PC) is a specialized hardware interface designed to extend the functionality of modern PCI-based computer systems by providing connectivity to legacy ISA AT bus devices. This expansion system enables users to integrate and operate ISA-based peripheral boards within a PCI environment, ensuring continued use of existing industrial or laboratory equipment that relies on the ISA bus standard. The BUF-PCI(PC) serves as a bridge between the PCI bus architecture and the ISA AT bus, maintaining compatibility at the I/O address and interrupt (IRQ) levels while omitting direct memory and DMA support.
2. Key Features
- PCI-to-ISA Bus Conversion: Provides a direct interface between a PCI slot and an ISA AT bus, allowing ISA cards to function within a PCI-based host system.
- I/O Address Space Assignment: The system relies on the PC BIOS to automatically assign I/O address space to the ISA bus, ensuring seamless integration without manual configuration.
- IRQ-Level Support: Supports one IRQ line within the extension, enabling interrupt-driven communication for compatible ISA devices.
- No Memory or DMA Support: The system is designed for I/O-mapped devices only; memory-mapped operations and DMA transfers are not supported.
- Compact Dual-Card Design: Consists of a PCI interface card and an ISA expansion card connected via a shielded cable, allowing flexible installation within or outside the host chassis.
- High-Quality Shielded Cable: Includes a 96-pin shielded cable (1 meter in length) to ensure signal integrity and minimize electromagnetic interference between the PCI and ISA interfaces.
- Industrial Reliability: Engineered for industrial and embedded applications where legacy ISA devices must be maintained or integrated into newer PCI-based systems.
- Plug-and-Play BIOS Integration: Utilizes standard BIOS-level resource allocation, reducing the need for custom drivers or manual configuration.
3. Technical Specifications
- PCI Interface Card Dimensions: 120 mm (W) × 107 mm (D)
- ISA Interface Card Dimensions: 160 mm (W) × 122 mm (D)
- Cable: 96-pin shielded cable, 1 meter in length
- Bus Standards:
- Host Side: PCI bus (Peripheral Component Interconnect)
- Expansion Side: ISA AT bus (Industry Standard Architecture)
- I/O Address Space: Assigned automatically by PC BIOS
- Memory Space: Not supported
- IRQ Support: One IRQ line available within the extension
- DMA Support: Not supported
- Material: High-quality PCB with gold-plated edge connectors and EMI-shielded cable assembly
- Operating Environment: Designed for standard PC operating conditions (typical 0–50°C, non-condensing humidity)
- Weight: Approximately 200–300 g combined (PCI + ISA cards and cable)
- Connector Type: 96-pin high-density shielded connector for interconnection between PCI and ISA boards
4. Functionality
The BUF-PCI(PC) functions as a transparent bridge that allows a PCI-based host computer to communicate with ISA bus peripherals. The system consists of two main components: a PCI interface card installed in the host computer’s PCI slot, and an ISA interface card that provides the physical ISA bus slots for legacy expansion boards. These two cards are linked via a 96-pin shielded cable, which transmits control, address, and data signals between the PCI and ISA buses.
When the system is powered on, the PC BIOS detects the PCI card and assigns I/O address space to the ISA bus extension. This automatic configuration enables the connected ISA devices to appear as standard I/O-mapped peripherals to the operating system. The BUF-PCI(PC) supports one IRQ line, allowing interrupt-driven devices to function properly. However, because memory and DMA transfers are not supported, the system is best suited for ISA devices that rely solely on I/O-mapped communication.
Typical Use Cases and Applications:
- Integration of legacy ISA-based industrial control boards into modern PCI systems
- Retrofitting older measurement, data acquisition, or automation equipment
- Maintaining compatibility with specialized ISA hardware in laboratory or production environments
- Supporting long-term maintenance of systems where ISA peripherals remain critical to operations
Compatibility:
- Compatible with standard PCI bus architectures (32-bit, 33 MHz)
- Supports ISA AT bus devices that operate within standard I/O address and IRQ configurations
- Works with most PC BIOS implementations that support automatic I/O resource allocation
5. Components & Accessories
Included Items:
- 1 × PCI Interface Card (120 × 107 mm)
- 1 × ISA Interface Card (160 × 122 mm)
- 1 × 96-pin Shielded Interconnect Cable (1 m length)
- 1 × User Documentation (installation and configuration guide)
Optional Accessories (if available):
- Extended-length shielded cables for remote ISA chassis installation
- Mounting brackets or enclosures for external ISA card housing
- Replacement interconnect cables
Connectors:
- PCI Card: Standard PCI edge connector for host interface
- ISA Card: Standard ISA AT bus slot(s) for peripheral connection
- Interconnect: 96-pin shielded connector for signal transmission between PCI and ISA cards
6. Installation & Setup
Requirements:
- Available PCI slot in the host computer
- Compatible ISA device(s) for connection to the ISA expansion card
- Adequate internal or external space for mounting both cards and routing the interconnect cable
Installation Procedure:
1. Power off the host computer and disconnect it from the power source.
2. Insert the PCI interface card into an available PCI slot on the motherboard.
3. Mount the ISA interface card in a suitable location (either within the same chassis or in an external enclosure).
4. Connect the PCI and ISA cards using the provided 96-pin shielded cable, ensuring secure and correct orientation.
5. Power on the system; the PC BIOS will automatically detect the PCI card and assign I/O address space to the ISA bus.
6. Install the ISA peripheral card(s) into the ISA interface card’s slot(s).
7. Verify device recognition and functionality through the operating system or diagnostic utilities.
Configuration:
- No manual jumper or switch settings are typically required; configuration is handled by the BIOS.
- Users may need to verify IRQ assignments to avoid conflicts with other system devices.
Mounting Options:
- Internal mounting within a PC chassis (if space allows)
- External mounting using an expansion chassis or rackmount enclosure
7. Performance & Capabilities
- Bus Speed: Operates at standard PCI bus frequency (33 MHz) for host communication; ISA bus operates at 8 MHz nominal.
- Data Throughput: Limited by ISA bus bandwidth; suitable for low- to moderate-speed I/O operations.
- Latency: Minimal additional latency introduced by the bridge, sufficient for typical control and monitoring applications.
- Capacity: Supports one or more ISA devices depending on the configuration of the ISA interface card.
- Efficiency: Optimized for stable and reliable I/O communication; not intended for high-throughput or memory-intensive applications.
- Limitations:
- No support for memory-mapped ISA devices
- No DMA channel support
- Limited to one IRQ line within the extension
- Dependent on BIOS-level resource allocation
Despite these limitations, the BUF-PCI(PC) provides a robust and practical solution for extending the operational life of ISA-based hardware in modern computing environments.
8. Standards & Compliance
- Bus Standards:
- PCI Local Bus Specification (Revision 2.2 or compatible)
- ISA AT Bus Standard (Industry Standard Architecture)
- Electrical Compliance: Meets standard PC interface voltage and signaling requirements (3.3V/5V tolerant as applicable)
- EMI/EMC: Shielded cable design minimizes electromagnetic interference; compliant with general PC system EMC standards
- Safety and Quality: Manufactured under Contec’s quality management system, adhering to industrial-grade reliability standards
- Regulatory Compliance:
- CE marking (if applicable)
- RoHS compliance for hazardous substance reduction
- Conforms to standard PC hardware safety and environmental directives
9. Additional Information
Warranty:
Typically covered by Contec’s standard limited warranty (duration varies by region and distributor), which includes repair or replacement for manufacturing defects under normal operating conditions.
Technical Support:
Contec provides comprehensive technical support, including installation guidance, troubleshooting assistance, and product documentation. Support resources may include downloadable manuals, FAQs, and firmware updates (if applicable).
Maintenance:
- Periodic inspection of cable connections and connectors is recommended to ensure signal integrity.
- Avoid excessive bending or stress on the shielded cable.
- Keep connectors free from dust and contaminants.
Firmware/Software Updates:
The BUF-PCI(PC) operates primarily at the hardware and BIOS level and does not require dedicated firmware or driver updates. However, users should ensure that their system BIOS and operating system are up to date for optimal compatibility.
Service Life and Reliability:
Designed for long-term industrial use, the BUF-PCI(PC) offers stable performance and mechanical durability. The shielded cable and robust PCB construction contribute to extended operational life in demanding environments.
Documentation and Resources:
- Product datasheet and installation manual available from Contec’s official website
- Application notes for integrating ISA devices into PCI systems
- Technical reference for supported I/O address and IRQ configurations
Summary
The Contec BUF-PCI(PC) PCI Bus to ISA AT Bus Expansion System is a professional-grade interface solution that bridges the gap between modern PCI-based computing platforms and legacy ISA hardware. With automatic BIOS-based I/O address assignment, single IRQ support, and a high-quality shielded interconnect cable, it provides a reliable and efficient means of maintaining compatibility with older ISA devices. Although it does not support memory or DMA operations, its robust design and straightforward installation make it ideal for industrial, laboratory, and embedded applications where legacy hardware integration is essential.
By combining proven ISA technology with modern PCI infrastructure, the BUF-PCI(PC) ensures that critical legacy systems can continue to operate seamlessly within contemporary computing environments, preserving both functionality and investment value.
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