Keyboard (fromUP1

package)

Map_update:Decode the keyboard scancode and update the Map

Scan_ready

Read

Scan_code [7..0]

VGA_sync (from UP1 package)

Vert_sync

Draw:Read the bitmap and update the screen

Map_X [5..0] <= Pixel_column [9..4]Map_Y [4..0] <= Pixel_row [8..4]

Bitmap_address[10..0] <= Grid_type [2..0] & Pixel_row [3..0] & Pixel_column [3..0]

Red <= Bitmap_data(2); Green <= Bitmap_data(1); Blue <= Bitmap_data(0)

Pixel_row [9..0]

Pixel_column [9..0]

Red

Green

Blue

Map_IOMap_address[10..0] <= Map_X [5..0]& Map_Y [4..0]

Write

Map_X [5..0]

Map_Y [4..0]

Reset

Level

Grid_type [2..0]G

rid_t

ype

[2..0

]

Maps(Blocks of

40 x 32 x 3bits)All levels of maps is stored here

Grid_type [2..0] a2 a1 a0 000: 4FF:

(40 x 32 x 3 bits) map for 1st level

500: 9FF:

(40 x 32 x 3 bits) map for 2nd level

… …

Current_map(40 x 32 x 3bits)

Grid_type [2..0] a2 a1 a0 000: 01F:

1st column of current map

020: 03F:

2nd column of current map

… …

4E0: 4FF:

40th column of current map

Bitmap(8 x 256 x 3bits)

redb2

greenb1

blueb0

000: 0FF:

(16 x 16 x 3 bits) bitmap for grid

type 000 (Background)

100: 1FF:

(16 x 16 x 3 bits) bitmap for grid type 001 (Wall)

… …

700: 7FF:

(16 x 16 x 3 bits) bitmap for grid

type 111 (Ball on Destination Grid)

Map_X [5..0]

Map_Y [4..0]