Description
DTC 20721 ISA MFM Hard Drive Controller Card 01-00336 Vintage PC XT AT Bus
ISA bus controller card for MFM hard drives. Routes data between MFM-type hard drives and IBM PC XT, AT, and compatible systems via the ISA bus interface.
Specifications & What's Included
- Brand: DTC | Model: 20721 | MPN: 01-00336
- Bus Interface: ISA (Industry Standard Architecture)
- Drive Interface: MFM (Modified Frequency Modulation)
- Form Factor: Full-Length ISA Card
- Connector: DB-37 Female (bracket-mount)
- Card only — no cables or accessories included
Applications
MFM controller cards were standard equipment in IBM PC XT and AT systems during the 1980s and early 1990s. This card interfaces MFM hard drives—the dominant drive standard of that era—to the ISA bus. Suitable for restoration, retrofitting, or maintaining vintage IBM-compatible computers and systems that require period-correct storage subsystem components.
Condition: Used
This DTC 20721 ISA MFM Hard Drive Controller Card (fab no. 01-00336) has been inspected and appears to be in good used condition. The PCB is clean with no visible cracks, burn marks, or broken traces. The ISA edge connector fingers and the DB-37 bracket connector both look intact. Normal light surface wear consistent with previous use in a PC system. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
This DTC 20721 ISA MFM Hard Drive Controller Card (fab no. 01-00336) has been inspected and appears to be in good used condition. The PCB is clean with no visible cracks, burn marks, or broken traces. The ISA edge connector fingers and the DB-37 bracket connector both look intact. Normal light surface wear consistent with previous use in a PC system. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose
Additional Information
Brand: |
DTC |
Model: |
20721 |
MPN: |
01-00336 |
Secondary Model: |
01-00336 |
SKU: |
11567 |
Type: |
ISA MFM Hard Drive Controller Card |
Bus Interface: |
ISA (Industry Standard Architecture) |
Form Factor: |
Full-Length ISA Card |
Drive Interface: |
MFM (Modified Frequency Modulation) |
Compatible Drive Types: |
MFM Hard Drives |
Compatible Systems: |
IBM PC XT, AT, and ISA-bus compatible PCs |
Connector Type: |
DB-37 Female (bracket-mount) |
Condition: |
Used – Inspected and Pulled from Working Environment |
Seller Notes: |
Card only. No cables or accessories included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
DTC 20721 ISA MFM Controller Card 01-00336 inspected and in good used condition. PCB clean, ISA edge connector and DB-37 bracket connector intact. Normal light surface wear. Card only — no cables included. |
