Display system

Claim 2

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displacing said cursor in the horizontal and vertical directions thereof relatively to a display means (40); and, cursor display means (40) for displaying said cursor.

Claim 3

A display system according to Claim 1, characterized in that said cursor displacement means (10b,10d) is fixed in the amount of displacement thereof.

Claim 4

A display system according to Claim 2, characterized in that said fixed amount of displacement is equal to the size of said cursor.

Claim 5

A display system according to Claim 1, characterized in that said cursor displacement means (10b,10d) is adjustable in the amount of displacement thereof.

Claim 6

A display system according to Claim 4, characterized in that said amount of displacement corresponds to the values of the coordinates where a hot spot of said cursor is situated.

Claim 7

A display system according to any one of claims 1 to 5, characterized in that said cursor pattern includes a plurality of surfaces.

Claim 8

A display system according to any one of claims 1 to 6, characterized in that said cursor is not clipped in the borders of said screen.

Claim 9

A display system, characterized by: cursor pattern storage means (24) for storina the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displaying said cursor in the horizontal and vertical directions thereof relatively to a display means (40); cursor display means (40) for displaying said cursor; and cursor clip means (33) for clipping said cursor in the borders of said display means.

Claim 10

A display system, characterized by: cursor pattern storage means (24) for storina the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displaying said cursor in the horizontal and vertical directions thereof relatively to a display means (40); cursor display means (40) for displaying said cursor; and cursor clip means (33) for clipping said cursor in the borders of said display means.

Claim 11

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displacing said cursor in the horizontal and vertical directions thereof relatively to a display means (40); logical operation means (30) for performing logical operations on the pattern data of said cursor and the data of display contents; and, cursor display means (40) for displaying said cursor.

Claim 12

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displacing said cursor in the horizontal and vertical directions thereof relatively to a display means (40); logical operation means (30) for performing logical operations on the pattern data of said cursor and the data of display contents; and, cursor display means (40) for displaying said cursor.

Claim 13

A display system according to Claim 9, characterized in that said cursor pattern includes a plurality of surfaces.

Claim 14

A display system according to Claim 10, characterized in that said logical operation means (30) is adapted to perform logical operations for surfaces of siad cursor pattern which are different from one another.

Claim 15

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means :(10b,10d) for displaying said curso: in the horizontal and vertical directions thereof relatively to a display means (40) logical operation means (30) for performing logical operations on the data of said cursor pattern and the data of display contents; shift clock control means for controlling the shift clock of a shift register (25) which outputs said cursor pattern to said logical operation means (30) and the shift clock of another shift register (12) which outputs the display contents of a VRAM (11) so as to be different from each other: and, cursor display means (40) for displaying said cursor.

Claim 16

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; cursor displacement means :(10b,10d) for displaying said curso: in the horizontal and vertical directions thereof relatively to a display means (40) logical operation means (30) for performing logical operations on the data of said cursor pattern and the data of display contents; shift clock control means for controlling the shift clock of a shift register (25) which outputs said cursor pattern to said logical operation means (30) and the shift clock of another shift register (12) which outputs the display contents of a VRAM (11) so as to be different from each other: and, cursor display means (40) for displaying said cursor.

Claim 17

A display system according to Claim 12, characterized in that said shift clock control means is adapted to divide the frequency of said shift clock of said register (25) outputting said cursor pattern to said logical operation means (30) into one half thereof with respect to said shift clock of said shift register (12) outputting said display contents of said VRAM (11), and that said shift clock control means is able to double the transverse display width of said cursor without increasing the memory capacity of said cursor pattern register (24).

Claim 18

A display system, characterized by: a cursor pattern register (24) for storing the pattern of a given cursor; display position specifying means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displacing said cursor in the horizontal and vertical directions thereof relatively to a display means (40); logical operation means (30) for performing logical operations on the pattern data of said cursor and the data of display contents; bit shift means (28) for bit shifting the value of a vertical counter; a comparing adder (21) for comparing said bit shifted value with the value of a Y coordinate display position register; and cursor display means (40) for displaying said cursor pattern, said cursor pattern register (24), said display position specifying means (24), siad cursor displacement means (10b,10d), said logical operation means (30), said bit shift means (28), said comparing adder (21), and said cursor display means (40) being provided within a display control unit.

Claim 19

A display system, characterized by: a cursor pattern register (24) for storing the pattern of a given cursor; display position specifying means (24) for specifying a position where said cursor is displayed; cursor displacement means (10b,10d) for displacing said cursor in the horizontal and vertical directions thereof relatively to a display means (40); logical operation means (30) for performing logical operations on the pattern data of said cursor and the data of display contents; bit shift means (28) for bit shifting the value of a vertical counter; a comparing adder (21) for comparing said bit shifted value with the value of a Y coordinate display position register; and cursor display means (40) for displaying said cursor pattern, said cursor pattern register (24), said display position specifying means (24), siad cursor displacement means (10b,10d), said logical operation means (30), said bit shift means (28), said comparing adder (21), and said cursor display means (40) being provided within a display control unit.

Claim 20

A display system according to Claim 14, characterized in that said bit shift means (28) is adapted to bit shift by 1 bit the input of said vertical counter, and that the vertical display width of said cursor can be doubled without increasing the memory capacity of said cursor pattern register (24).

Claim 21

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; and cursor display means (40) for displaying said cursor.

Claim 22

A display system, characterized by: cursor pattern storage means (24) for storing the pattern of a given cursor; display position specifier means (24) for specifying a position where said cursor is displayed; and cursor display means (40) for displaying said cursor.