DC-4 Disk Controller Board

The SWTPC minifloppy disk unit is a dual drive, double sided, five-inch disk unit. Double density operation is also available when using the DC-4 disk controller board. The disk unit was designed specifically for the SWTPC 6809 computer. Although the disk unit was completely assembled and tested at the factory, minor reprogramming of the circuit board may be necessary to operate with your particular computer system.

Introduced by Southwest Technical Products Corporation in 19??. The assembled board cost $200.

Board Photo (77K JPG)

Board Photo High Resolution (171K JPG)

DC-4 Assembly Instructions (230K PDF)

DC-4 Schematic (223K JPG)

I would like a color scan of the Red and Blue circuit board diagram. (300 dots per inch)

Michael Holley's SWTPC Collection Home Page