Memory Map - Casio QT-2100 Service Manual

5-5. I/O CONTROLLER (IC11)

5-5-1. MEMORY MAP

00000
SYSTEM RAM
(0FFD0 ~ 0FFDF : External I/O)
20000
LCDC VRAM
256 Kbit
28000
LCDC I/O
28010
Not used (LCDC I/O)
30000
Not used
80000
Character Generator
EPROM
4 Mbit
FFFFF
ADDRESS R/W FUNCTION
D0
~ 28000H –
D7
D0 RAMS
D1 LCDE
D2 4/8
D3 28001H W CRAY
D4 OR
D5 PANEL
D6 REV
D7 DISP
D0
~ 28002H W C/R
D7
D0
~ 28003H W LPW
D7
D0
~ 28004H W SLTL
D7
D0
~ 28005H W SLTH
D7
D0
~ 28006H R/W SAD1L
D7
D0
~ 28007H R/W SAD1H
D7
D0
~ 28008H R/W SAD2L
D7
D0
~ 28009H R/W SAD2H
D7
D0
~ 2800AH W SL1L
D7
D0
~ 2800BH W SL1H
D7
D0
~ 2800CH –
D7
D0
~ 2800DH W APADJ
D7
D0
~ 2800EH W GS1
D7
D0
~ 2800FH W GS2
D7
— 21 —
REMARK
Set up basic performance mode for
SED1353.
Number of horizontally displayed
characters per 1 line
Pulse width of LP per 1 line
Number of vertical lines in the LCD
(lower 8 bit)
Number of vertical lines in the LCD
(upper 2 bit)
Start address in the first screen (lower 8 bit)
Start address in the first screen (upper 8 bit)
Start address in the second screen
(lower 8 bit)
Start address in the second screen
(upper 8 bit)
Number of vertical lines in the fist screen
(lower 8 bit)
Number of vertical lines in the fist screen
(lower 8 bit)
Address pitch adjust in the virtual screen
Gradation conversion code
Gradation conversion code