Display Window 1 Column Width Register

Register

Names

(addresses):

COLWIDTH1B3

(0x8417),

COLWIDTH1B2

(0x8416),

COLWIDTH1B1

(0x8415),

COLWIDTH1B0 (0x8414)

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

COL

31

COL

30

COL

29

COL

28

COL

27

COL

26

COL

25

COL

24

COL

23

COL

22

COL

21

COL

20

COL

19

COL

18

COL

17

COL

16

15

14

13

12

11

10

987654321

0

COL15 COL14 COL13 COL12 COL11 COL10 COL9 COL8 COL7 COL6 COL5 COL4 COL3 COL2 COL1 COL0

Bits 31–0

These are the Display Window 1 Column Width 2x Enable Bits. These thirty-two bits correspond to columns

31–0 of Display Window 1, respectively. A value of zero indicates the column will have normal width (12

pixels). A value of one indicates the column will be twice as wide as normal (24 pixels). For the double wide

case, each Character Font pixel location will be displayed twice, in two consecutive horizontal pixel locations.

The user should note that if more than 32 display characters are programmed to reside on a row, then all

display characters after the first thirty-two will have normal width (12 pixels).

Display Window 2 Horizontal Start Location Register

Register Name (address): HSTRT2 (0x8418)

7

6

5

4

321

0

2H7

2H6

2H5

2H4

2H3

2H2

2H1

2H0

Bits 7–0

This register determines the horizontal start position of Window 2 in OSD pixels (not video signal pixels). The

actual position, to the right of the horizontal flyback pulse, is determined by multiplying this register value by 4

and adding 30. Due to pipeline delays, the first usable start location is approximately 42 OSD pixels following

the horizontal flyback time. For this reason, we recommend this register be programmed with a number larger

than 2, otherwise improper operation may result.

Display Window 2 Vertical Start Location Register

Register Name (address): VSTRT2 (0x8419)

7

6

5

4

321

0

2V7

2V6

2V5

2V4

2V3

2V2

2V1

2V0

Bits 7–0

This register determines the Vertical start position of Window 2 in constant-height character lines (not video

scan lines). The actual position is determined by multiplying this register value by 2. (Note: each character line

is treated as a single auto-height character pixel line, so multiple scan lines may actually be displayed in order

to maintain accurate position relative to the OSD character cell size. See the Constant Character Height

Mechanism section.) This register should be set so the entire OSD window is within the active video.

Display Window 2 Start Address

Register Names (addresses): W2STRTADRH (0x841B) W2STRTADRL (0x841A)

15

14

13

12

11

10

987654321

0

RSV

RSV

RSV

RSV

RSV

RSV

RSV

2AD8

2AD7

2AD6

2AD5

2AD4

2AD3

2AD2

2AD1

2AD0

Bits 8–0

This register determines the starting address of Display Window 2 in the Display Page RAM. This first address

location will always contain the SL code for the first row of Display Window 2.

Bits 15–9

These bits are reserved and should be set to zero.

Display Window 2 Column Width Register

Register

Names

(addresses):

COLWIDTH2B3

(0x841F),

COLWIDTH1B2

(0x841E),

COLWIDTH2B1

(0x841D),

COLWIDTH1B0 (0x841C)

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

COL

31

COL

30

COL

29

COL

28

COL

27

COL

26

COL

25

COL

24

COL

23

COL

22

COL

21

COL

20

COL

19

COL

18

COL

17

COL

16

15

14

13

12

11

10

987654321

0

COL15 COL14 COL13 COL12 COL11 COL10 COL9 COL8 COL7 COL6 COL5 COL4 COL3 COL2 COL1 COL0

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