Description
National Computer NDC5525 16-Bit ISA Hard Drive Controller Card
The National Computer NDC5525 is a 16-bit ISA hard drive controller card designed to interface hard disk drives with ISA-bus desktop computers. The card plugs into a standard 16-bit ISA expansion slot and provides the controller logic needed to connect and manage one or more hard drives in compatible systems.
Specifications & What's Included
- Manufacturer: National Computer Ltd.
- Model: NDC5525
- Bus Interface: 16-bit ISA
- Function: Hard drive controller card
- Connectors: 40-pin ribbon cable header(s) for drive attachment; DB9-style bracket connector visible on front panel
- Jumper blocks present for configuration
- Multiple controller ICs on board (markings not fully legible in photos)
- Card only — no cables or mounting hardware included
Applications
ISA hard drive controller cards like the NDC5525 were standard components in IBM-compatible desktop PCs of the late 1980s and early 1990s, the era when the 16-bit ISA bus was the dominant expansion standard before PCI took over in the mid-1990s. These cards provided the interface between the system bus and hard disk drives (typically MFM, RLL, or early IDE drives depending on the controller design), allowing the PC to read and write data to spinning-platter storage. Today, cards like this are sought by vintage computing enthusiasts restoring period-correct ISA-bus systems, as well as by industrial and embedded users maintaining legacy equipment that still runs on original ISA hardware. The NDC5525 is suited for use in any 16-bit ISA-compatible desktop PC motherboard of the era.
This National Computer NDC5525 16-bit ISA hard drive controller card has been inspected and is in good used condition. It was pulled from a working environment where it was previously in use. It has not been bench-tested at our facility. The board shows normal handling wear consistent with prior use, and the ISA edge connector and component side look clean in our photos. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
National Computer |
Model: |
NDC5525 |
MPN: |
NDC5525 |
Type: |
Hard Drive Controller Card |
SKU: |
50117 |
Bus Type: |
ISA (16-bit) |
Interface: |
16-Bit ISA |
Form Factor: |
ISA Expansion Card |
Compatible With: |
Legacy ISA-bus desktop PCs |
Seller Notes: |
Card only — no cables or mounting hardware included. |
Country/Region of Manufacture: |
Taiwan |
Condition Notes: |
National Computer NDC5525 ISA hard drive controller card in good used condition. Pulled from a working environment; not bench-tested at our facility. Board and edge connector appear clean. Please view photos and contact us with questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
