Lucent Technologies MN10285K - Manual (Page 173)

On-Screen Display
ROM
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
172
Panasonic
7.9 ROM
7.9.1 ROM Organization
Notes: 1. All addresses are expressed in hex notation. Other values are decimal.
2. GROMEND: Graphics ROM end address (programmable to any address)
3. CROMEND: Text ROM end address (programmable to any address)
4. M: Number of characters - 1
5. m: 0 and up
6. N: Number of graphic tiles - 1 (16-color mode)
7. n: 0 and up
Figure 7-9 ROM Organization
CROMEND − 23
CROMEND − 22
CROMEND − 21
CROMEND − 20
CROMEND − 1F
CROMEND − 1
CROMEND
Line 1 bits 7 to 0
Line 1 bits 15 to 8
Line 2 bits 7 to 0
Line 2 bits 15 to 8
Line 3 bits 7 to 0
.
.
.
Line 18 bits 7 to 0
Line 18 bits 15 to 8 1 byte
CROMEND − 24 × (M + 1) + 1
CROMEND − 24 × M
CROMEND − 24 × (m + 1) + 1
CROMEND − 24 × m
CROMEND − 47
CROMEND − 24
CROMEND − 23
CROMEND
Code M
text data
.
.
.
Code m
text data
.
.
.
Code 01
text data
Code 00
text data
36 bytes
Text ROM Addresses
Each character requires 36 bytes.
GROMEND − 7F
GROMEND − 78
GROMEND − 77
GROMEND − 70
GROMEND − 6F
GROMEND − 68
GROMEND − 67
GROMEND − 10
GROMEND − 0F
GROMEND − 08
GROMEND − 07
GROMEND
Line 1 data
Line 2 data
Line 3 data
.
.
.
Line 15 data
Line 16 data 8 bytes
GROMEND − 80 × (N + 1) + 1
GROMEND − 80 × N
GROMEND − 80 × (n + 1) + 1
GROMEND − 80 × n
GROMEND − FF
GROMEND − 80
GROMEND − 7F
GROMEND
Code N
graphics data
.
.
.
Code n
graphics data
.
.
.
Code 01
graphics data
Code 00
graphics data
128 bytes
x’080000’
CROMEND − 24 × (M + 1) + 1
CROMEND
GROMEND − 80 × (N + 1) + 1
GROMEND
Program
Data
Area
Text
ROM
36 bytes
GROMEND − 7
GROMEND − 6
GROMEND − 5
GROMEND − 4
GROMEND − 3
GROMEND − 2
GROMEND − 1
GROMEND
Sheet 1 bits 7 to 0
Sheet 1 bits 15 to 8
Sheet 2 bits 7 to 0
Sheet 2 bits 15 to 8
Sheet 3 bits 7 to 0
Sheet 3 bits 15 to 8
Sheet 4 bits 7 to 0
Sheet 4 bits 15 to 8 1 byte
Text character
16 bits
18 bits
Bit 15 Bit 0
Line 18
Line 1
Line 2
Line 3
Graphics tile (16-color mode)
Sheet 4
Sheet 3
Sheet 2
Sheet 1
1 dot = 4 bits
= 16 colors
Bit 15 Bit 0
16 bits
Line 16
Line 1
Line 2
Line 3
Graphics ROM Addresses
In 16-color mode, each tile
requires 128 bytes.
(16-color mode)
(16-color mode)
(16-color mode)
Graphics
ROM