Step back to 1979 and the dawn of professional business microcomputing. Before IBM dominated corporate desktops, the massive, all-in-one Tandy Radio Shack TRS-80 Model II was running accounting ledgers, early word processors, and CP/M across America with its booming 8-inch floppy disk drives.

Up for sale is an authentic, original Tandy TRS-80 Model II Floppy Disk Controller (FDC) Interface Card (Part # 8709063 REV B, dated 1979).

This is the vital heart that bridged the Z80 bus to the 8" disk subsystem. It features the classic Synertek SY1791-02 floppy formatter/controller, a Zilog Z80A PIO, and the rare, period-correct factory patch "satellite" daughterboard assembly soldered right in place—a true hallmark of early silicon engineering and rapid field revisions in the golden age of personal computing.

Board Specifications & Highlights:

• Manufacturer: Tandy Corporation / Radio Shack

• Part / PCB Number: 8709063 REV B (Serial No. 204628)

• Year: 1979

• Key ICs: Synertek SY1791-02 FDC, Zilog Z80A PIO, 74LS TTL logic array

• Bus Interface: Dual-sided edge finger connectors for the proprietary TRS-80 Model II backplane cage