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IBM 51G8518 51G8518 - IBM 8-Port RS-232 Micro Channel Async Adapter
- Product Type: Asynchronous Adapter Card
- Ports: 8 x RS-232 Serial Ports
- Bus Type: Micro Channel Architecture (MCA)
- Compatibility: IBM PS/2 and compatible systems
- Interface: RS-232
- Supports asynchronous communication
- Enables connection to multiple serial devices (modems, printers, terminals)
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Product Overview
The IBM 51G8518 is an 8-Port RS-232 Micro Channel Async Adapter designed for IBM PS/2 and compatible systems. It provides eight serial ports for connecting various asynchronous devices.
Technical Information
| Product Type | Asynchronous Adapter Card |
| Number of Ports | 8 |
| Serial Interface | RS-232 |
Additional Specifications
| Bus Type | Micro Channel Architecture (MCA) |
| Compatibility | IBM PS/2 |
Product Description
The IBM 51G8518 is a multi-port asynchronous adapter card specifically designed for systems utilizing the Micro Channel Architecture (MCA), most notably the IBM Personal System/2 (PS/2) line of computers. This adapter significantly expands a system's connectivity by providing eight individual RS-232 serial ports. RS-232 is a standard interface for serial communication, commonly used for connecting peripherals such as modems, printers, terminals, and other serial devices that communicate asynchronously. The Micro Channel Architecture was IBM's proprietary bus design introduced with the PS/2, offering advantages in speed and bus mastering capabilities over the ISA bus prevalent at the time. An adapter like the 51G8518 would leverage MCA to provide efficient data transfer for its multiple serial ports, allowing a single card to handle communication for numerous devices simultaneously. This type of adapter was essential in environments where multiple serial devices needed to be connected to a single computer, such as in industrial control, point-of-sale systems, or legacy networking setups. The 8-port configuration offered a high density of serial connectivity from a single expansion slot, making it a valuable component for expanding the I/O capabilities of MCA-based IBM systems.
