Lucent Technologies MN10285K User Manual

169

Notes:

1. All addresses are expressed in hex notation. Other values are decimal.
2. GRAMEND: Graphics RAM end address (programmable to any address)
3. CRAMEND: Text RAM end address (programmable to any address)
4. M: Number of lines in the text layer
5. m: 1 and up
6. N: Number of lines in the graphics layer
7. n: 1 and up

GRAMEND

−

3F

GRAMEND

−

3E

GRAMEND

−

3D

GRAMEND

−

3C

GRAMEND

−

3B

GRAMEND

−

3A

GRAMEND

−

2F

GRAMEND

−

2E

GRAMEND

−

3

GRAMEND

−

2

GRAMEND

−

1

GRAMEND

Unused area

Unused area

Code 30

Code 29

.
.
.

Code 2

Code 1

2 bytes

Low-order 8 bits

of graphics code
High-order 8 bits
of graphics code

GRAMEND

−

40

×

N

+

5

GRAMEND

−

40

×

(N

−

1)

GRAMEND

−

40

×

n

+

5

GRAMEND

−

40

×

(n

−

1)

GRAMEND

−

7B

GRAMEND

−

40

GRAMEND

−

3B

GRAMEND

Line N data

.
.
.

Line n data

.
.
.

Line 2 data

Line 1 data

64 bytes

(When GEXTE = 1)

CRAMEND

−

4F

CRAMEND

−

4E

CRAMEND

−

4D

CRAMEND

−

4C

CRAMEND

−

4B

CRAMEND

−

4A

CRAMEND

−

3

CRAMEND

−

2

CRAMEND

−

1

CRAMEND

Code 40

Code 39

Code 38

.
.
.

Code 2

Code 1

2 bytes

Low-order 8 bits

of text code

High-order 8 bits

of text code

CRAMEND

−

50

×

M

+

1

CRAMEND

−

50

×

(M

−

1)

CRAMEND

−

50

×

m

+

1

CRAMEND

−

50

×

(m

−

1)

CRAMEND

−

9F

CRAMEND

−

50

CRAMEND

−

4F

CRAMEND

Line M data

.
.
.

Line m data

.
.
.

Line 2 data

Line 1 data

80 bytes

GRAMEND

−

40

×

N

+

5

GRAMEND

CRAMEND

−

50

×

M

+

1

CRAMEND

Program

Data

and

Stack

Area

Graphics

VRAM

Text

VRAM

x'009FFF'

x'008000'