Pertec FDD

Unknown iCOM Dual FDD Enclosure

Wondering what that blue connector is for???

From; Mike Douglas

Looks like an FD-3812 or related unit. Your cabinet is missing the controller board. See the attached pictures. The S-100 board in the computer is not actually a controller, just a buffered data interface between the FD-3812 and the Altair. The board in the computer also has a boot ROM for the drive. The controller board in the drive cabinet controls all drive functions. It is soft sectored, double density instead of hard sectored like the original Altair drives. It ran "FDOS" from iCom/Pertec.

and from Tom Sanderson

The drive cabinet looks like an iCOM 3712 with the internal controller and S-100 interface missing. See: http://www.virtualaltair.com/virtualaltair.com/vac_icom_3712.asp

The drives are Shugart compatible (50-pin interface), however there are at least six configurations (see manual schematic). The revision like 03 or 06 is stamped on the board after the schematic number. The user could have changed the configuration based on the schematic table.

The drives might work with a Tarbell or other 8-inch controller. The drives are not compatible with MITS controllers, but the mechanical parts, especially the plastic door and bezel fir MITS drives are scarce. Check the door for cracks and be careful to protect the aging plastic.