7220 Datasheet, PDF (106/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

FUNCTIONAL DESCRIPTION
2.11 CRT display function
The character code used to specify a display character is determined based on the address in the
CRT display ROM in which that character data is stored.
Assume that 1 character data is stored in addresses 10XX016 to 10XXF16 (XX denotes “0016” to “7F16”)
and 10YY016 to 10YYF16 (YY denotes “XX + 80016”), then the character code is “XX 16.”
In other words, a character code is constructed with the low-order second and third digits (hexadecimal
notation) of the 5-digit address (1000016 to 107FF16) where that character data is stored.
A character code is “YY16” in addresses 1100016 to 11FFF16.
Table 2.11.3 shows the character code table.
Table 2.11.3 Character code table (be omitted partly)
Character code
0016
0116
0216
0316
:
7E16
7F16
8016
8116
:
FD16
FE16
FF16
Character data stored address
Left side 8 dots
Right 4 side 8 dots
1000016 to 1000F16
1080016 to 1080F16
1001016 to 1001F16
1081016 to 1081F16
1002016 to 1002F16
1082016 to 1082F16
1003016 to 1003F16
1083016 to 1083F16
:
:
107E016 to 107EF16
10FE016 to 10FEF16
107F016 to 107EF16
10FF016 to 10FFF16
1100016 to 1100F16
1180016 to 1180F16
1101016 to 1101F16
1181016 to 1181F16
:
:
117D016 to 117DF16
11FD016 to 11FDF16
117E016 to 117EF16
11FE016 to 11FEF16
117F016 to 117EF16
11FF016 to 11FFF16
7220 Group User’s Manual
2-79