Yamaha VL70-M Bitmap Window, ■Bitmap Window Data Format, ■Creating Bitmap Data

Bitmap Window

The VL70-m Bitmap Window function makes it possible to display 16 x 16 dot icons and

simple animation sequences on the VL70-m display in the PLAY mode. The bitmap data can be transmitted in the form of a data string from an external MIDI device, and will appear on the VL70-m display for about 3 seconds.

Icon

■Bitmap Window Data Format

The format for message window data is as follows (hexadecimal format):

F0 43 1n 4C 07 00 00 xx xx .... xx xx F7

“n” is the device number minus one. If the VL70- m device number is set to “1”, for example, “n” should be “0”.

“xx xx .... xx xx” is the bitmap data consisting of a

string of 48 2-digit hexadecimal bytes.

■Creating Bitmap Data

1.Block out the desired design on a 16 x 16 grid, as shown in the example below.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7

8

9

10

11

12

13

14

15

16

2.Filled squares will be represented by ones, and empty squares by zeroes.

	1	2	3	4	5	6	7	8	9	10 11 12 13 14 15 16
1	0	0	0	0	0	0	1	1	1	1	0	0	0	0	0	0
2	0	0	0	1	1	1	0	0	0	0	1	1	0	0	0	0
3	0	1	1	0	0	0	0	0	0	0	0	0	1	1	0	0
4	1	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0
5	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
6	0	0	0	0	0	0	1	1	1	1	0	0	0	0	0	0
7	0	0	0	0	1	1	1	1	1	1	1	1	0	0	0	0
8	0	0	0	1	0	0	1	1	1	1	0	0	1	0	0	0
9	0	0	1	0	0	1	1	1	1	1	1	0	0	1	0	0
10	0	1	0	0	0	1	0	1	0	0	1	0	0	0	1	0
11	1	0	0	0	0	1	1	1	0	0	1	0	0	0	0	1
12	0	1	0	0	0	1	1	1	0	0	1	0	0	0	1	0
13	0	0	1	0	0	1	1	1	1	1	1	0	0	1	0	0
14	0	0	0	1	0	0	1	1	1	1	0	0	1	0	0	0
15	0	0	0	0	1	1	1	1	1	1	1	1	0	0	0	0
16	0	0	0	0	0	0	1	1	1	1	0	0	0	0	0	0

3.Divide the design horizontally into three sections: two seven-columns and one two- columns in width. Add one column of squares the left of each section, and 5 columns to the right of the 2-column section, as shown in the example below. You now have 48 rows, each 8 columns in width.

	0	1	2	3	4	5	6	7		0	1	2	3	4	5	6	7		0	1	2	3	4	5	6	7
1	0	0	0	0	0	0	0	1	17	0	1	1	1	0	0	0	0	33	0	0	0	0	0	0	0	0
2	0	0	0	0	1	1	1	0	18	0	0	0	0	1	1	0	0	34	0	0	0	0	0	0	0	0
3	0	0	1	1	0	0	0	0	19	0	0	0	0	0	0	1	1	35	0	0	0	0	0	0	0	0
4	0	1	0	0	0	0	0	0	20	0	0	0	0	0	0	0	0	36	0	1	0	0	0	0	0	0
5	0	0	0	0	0	0	0	0	21	0	0	0	0	0	0	0	0	37	0	0	1	0	0	0	0	0
6	0	0	0	0	0	0	0	1	22	0	1	1	1	0	0	0	0	38	0	0	0	0	0	0	0	0
7	0	0	0	0	0	1	1	1	23	0	1	1	1	1	1	0	0	39	0	0	0	0	0	0	0	0
8	0	0	0	0	1	0	0	1	24	0	1	1	1	0	0	1	0	40	0	0	0	0	0	0	0	0
9	0	0	0	1	0	0	1	1	25	0	1	1	1	1	0	0	1	41	0	0	0	0	0	0	0	0
10	0	0	1	0	0	0	1	0	26	0	1	0	0	1	0	0	0	42	0	1	0	0	0	0	0	0
11	0	1	0	0	0	0	1	1	27	0	1	0	0	1	0	0	0	43	0	0	1	0	0	0	0	0
12	0	0	1	0	0	0	1	1	28	0	1	0	0	1	0	0	0	44	0	1	0	0	0	0	0	0
13	0	0	0	1	0	0	1	1	29	0	1	1	1	1	0	0	1	45	0	0	0	0	0	0	0	0
14	0	0	0	0	1	0	0	1	30	0	1	1	1	0	0	1	0	46	0	0	0	0	0	0	0	0
15	0	0	0	0	0	1	1	1	31	0	1	1	1	1	1	0	0	47	0	0	0	0	0	0	0	0
16	0	0	0	0	0	0	0	1	32	0	1	1	1	0	0	0	0	48	0	0	0	0	0	0	0	0

Added

columns

4.Use the chart below to convert the ones and zeroes in each row from binary format to hexadecimal format. The “bits” in columns 0 through 3 become the first digit, and the bits in columns 4 through 7 become the second digit of each hexadecimal byte.

For example, the 11th row in the example forms the binary byte:” “01000011”. Columns 0 through 3 form “0100”, which, using the chart, becomes hexadecimal digit “4”. Columns 4 through 7 form “0011”, which, using the chart, becomes hexadecimal digit “3”. The 11th row in the design can therefore be represented by hexadecimal byte “43”.

binary	hexadecimal		binary	hexadecimal
format	format		format	format
0000	0	1000		8
0001	1	1001		9
0010	2	1010		A
0011	3	1011		B
0100	4	1100		C
0101	5	1101		D
0110	6	1110		E
0111	7	1111		F

Appendix 105