Description
IBM 53F4634 ISA 3270 Coax Emulation Card Toshiba T9444B 8-Bit PC ISA Bus
The IBM 53F4634 is an 8-bit ISA expansion card that provides IBM 3270 coaxial terminal emulation for IBM-compatible PC/XT/AT desktop computers. It connects via a BNC coax port on the card bracket, allowing the host PC to communicate with IBM 3274 cluster controllers and access IBM mainframe or midrange systems running 3270 display sessions — replacing the need for a dedicated 3270 terminal. The main controller is a Toshiba T9444B (marked 10F0291), with supporting logic on a compact single-slot ISA form factor board.
Specifications & What's Included
- Manufacturer: IBM
- Part Number: 53F4634 ASP
- EC Number: A7B821
- Manufacture Date Code: LOC 23, 9011 (November 1990)
- Bus Interface: 8-bit ISA (Industry Standard Architecture)
- Emulation Type: IBM 3270 coax terminal emulation
- Main Controller Chip: Toshiba T9444B (10F0291)
- Coax Connector: BNC, mounted on metal slot bracket
- Form Factor: Single-slot ISA expansion card
- PCB color: Green; full-length ISA gold edge connector
- Card only — no cables, software, or documentation included
Applications
IBM 3270 emulation cards like the 53F4634 were used throughout the late 1980s and early 1990s to give standard IBM PC/XT/AT-class desktop computers direct connectivity to IBM mainframe environments via coaxial cable. In a typical setup, the card connected to an IBM 3274 or compatible cluster controller over coax, and 3270 emulation software running on the PC presented one or more 3270 display sessions — effectively turning the PC into a 3270 terminal without requiring separate dedicated hardware. This was a common arrangement in banking, insurance, government, and large enterprise environments that ran IBM System/370, System/390, or AS/400 host applications. The 8-bit ISA bus interface means this card is compatible with PC/XT and PC/AT motherboards, as well as later ISA-slot systems. Today these cards are sought by legacy system maintainers keeping aging IBM host environments running, and by vintage computing collectors restoring period-accurate IBM PC workstation setups from the early 1990s era.
This IBM 53F4634 ISA 3270 Coax Emulation Card was pulled from a working environment but has not been powered or tested at our facility. The card appears to be in good physical condition with normal wear consistent with prior service use. The PCB is clean with no visible cracks, burn marks, or damaged components. The BNC coax connector and ISA edge connector both look intact. 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
Additional Information
Brand: |
IBM |
Model: |
53F4634 |
MPN: |
53F4634 |
Secondary Model: |
53F4634 ASP |
EC Number: |
A7B821 |
Type: |
ISA 3270 Coax Emulation Card |
SKU: |
46602 |
Condition: |
Used – Pulled from Working Environment |
Chipset / Controller: |
Toshiba T9444B 10F0291 |
Bus Interface: |
ISA (8-Bit) |
Connector Type: |
BNC Coax |
Form Factor: |
ISA Expansion Card |
Compatible With: |
IBM PC/XT/AT, PS/2 with ISA slots |
Compatible With 2: |
IBM 3274 Cluster Controller, 3270 mainframe systems |
Interface Type: |
Coax (3270 Coax) |
Emulation: |
IBM 3270 Terminal Emulation |
Manufacture Date Code: |
LOC 23 / 9011 (Nov 1990) |
Country/Region of Manufacture: |
Japan |
Seller Notes: |
Card only. No cables or software included. |
Condition Notes: |
IBM 53F4634 ISA 3270 coax emulation card pulled from a working environment; not tested at our facility. PCB is clean, BNC and ISA connectors intact, no visible damage. Card only — no cables or software included. |
