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when power is on.
On writing data, the address of the above 5 registers are as
follows;
- CWR#0 (82C53)
- CWR#2 (82C53)
- ICW1 (82C59)
- ICW2 (82C59)
- ICW4 (82C59)
Page C-10
FIGURE C-2 Data Register and Index Register
Page D-1
MODEL:T1200H/HB
Page D-1
D.1 GENERAL
The Display Controller Gate Array is a CMOS type chip with
5,000-gate, 100-pin flat package, and it contains the color
graphics adapter which can control both the external CRT display
and the internal LCD display.
This gate array contains the following functions.
-LCD/CRT control function
-Attribute process function
-Interface with the CPU (I/O bus)
-Interface with the V-RAM and with the CG-ROM
FIGURE D-1 Display
The detailed description of each pin and signal is also given here.
The whole system including this gate array is called the Display
Controller Subsystem, and it can control the following two types of
displays.
(A) 640x200 dot LCD (Liquid
(B) 640x200 dot CRT (Cathode Ray Tube) Display
Note that the external CRT display unit and the internal LCD can
not be used at the same time, and its selection is performed by
043H and moreover, bit 6 and 7 of the write data
are "0".
043H and moreover, bit 6 of the write data
is "0", and 7 "1".
020H and moreover, bit 4 of the write data
is "1".
021H
021H (data is written after the address ICW2).
Conroller Gate Array
Cristal Display)
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