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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