FIG. 1 is a top, front, right side perspective view of a magnetic disk controller for electronic computers showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof, the opposite side being a mirror image of the side shown;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front, right side perspective view of a second embodiment of my new design;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a right side elevational view thereof, the left side being a mirror image of the right;

FIG. 11 is rear elevational view thereof;

FIG. 12 is a bottom plan view thereof.