Product Description
Xircom RBE-100 RealPort CardBus Ethernet 10/100 Adapter – Type III PC Card for Vintage Laptops
This used Xircom RBE-100 is a RealPort CardBus Ethernet adapter designed for laptop computers with CardBus (32-bit) slots. Its primary claim to fame is the innovative RealPort design, which integrates the RJ45 connector directly into the card itself. This eliminates the need for a separate, easy-to-lose dongle or cable, providing a more robust and secure connection that sits flush with the laptop’s side . This design is widely praised for its stability and convenience, making the network connection feel like a built-in port .
The RBE-100 supports both 10Base-T and 100Base-TX Ethernet standards, offering flexible connectivity for legacy systems .
Key Specifications & Features
| Specification | Details |
|---|---|
| Manufacturer | Xircom |
| Model | RBE-100 |
| Type | RealPort CardBus Ethernet Adapter |
| Interface | 32-bit CardBus (PC Card) |
| Network Standards | 10Base-T, 100Base-TX |
| Connector | Integrated RJ45 (no dongle required) |
| Form Factor | Type III PC Card (approx. 10.5mm thick) |
| Dimensions (WxDxH) | 86 mm x 54 mm x 10.5 mm |
| System Requirements | CardBus-compatible slot. Requires two stacked Type II slots or one Type III slot . Will not fit in ultra-thin Type II-only slots . |
| PCI IDs | Vendor ID: 115d, Device ID: 0003, Subsystem ID: 0181 |
Software & Driver Support
The RBE-100 is well-supported across a variety of operating systems, which is a key reason for its enduring popularity in the vintage computing community.
-
Microsoft Windows: Compatible with Windows 3.x, 95, 98, NT, 2000, and XP, with drivers often included in newer versions of these OSes . Older drivers are also available from support archives .
-
Linux: Supported by the
xircom_cbkernel driver. Users report it works reliably with kernels such as 2.6.16.11 . The card is recognized by its PCI IDs .
Condition
SOLD AS IS
USED – SHOWS NORMAL WEAR (scuffs, minor marks)
FUNCTIONALITY NOT TESTED
NO DRIVER DISK OR ORIGINAL PACKAGING INCLUDED (drivers are widely available online)
PICTURE MAY NOT MATCH PRODUCT
⚠ COMPATIBILITY NOTE: This is a Type III CardBus card (10.5mm thick). Please verify that your laptop has a CardBus-compatible slot and sufficient physical space (either one Type III slot or two stacked Type II slots) before purchasing . It will not fit in standard Type II-only slots.



