TitleApple II DMAbyak controller card and attached switches
ManufacturerSouthern California Research Group
Dimensionsoverall: 3 x 4 x 1/2 in
DescriptionApple II I/O Controller (almost the same size as the card) is attched by a gray ribbon cable.
"The hardeware product gives the user complete control over all I/O functions in the range $000 through $C0FF." Text copied from SCRG Catalog for yoiur Apple Computer on archive.org.