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(1) Memory for display
There are 2 types of display memory: CRT display ROM (addresses 10000
display RAM (addresses 0600
CRT display ROM (addresses 10000
CRT display ROM has a capacity of 4 K bytes. Since 32 bytes are required for 1 character data,
the ROM can stores up to 128 kinds of characters.
CRT display ROM is broadly divided into 2 areas. The [vertical 16 dots]
8 dots] data of display characters are stored in addresses 10000
dots]
[horizontal (right side) 4 dots] data of display characters are stored in addresses 10800
to 10FFF
(refer to "Figure 4.5.11"). Note however that the high-order 4 bits of the data to be
16
written to addresses 10800
b7
0
10XX0
16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10XXF
16
Fig. 4.5.11 Example of display character data storing form
to 06B3
16
to 10FFF
16
b0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
0
1
0
1
0
0
0
1
0
0
0
1
0
0
1
0
0
0
1
1
0
0
1
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7220 Group User's Manual
M37220M3-XXXSP/FP
). Each type of display memory is described below.
16
to 10FFF
)
16
16
must be set to "1" (by writing data FX
16
b7
1
1
1
10XX0
16
+800
16
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10XXF
16
+800
16
4.5 Functional description
to 10FFF
16
[horizontal (left side)
to 107FF
; the [vertical 16
16
16
).
16
b3
b0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
1
1
0
0
0
1
1
0
0
0
1
0
1
0
0
1
1
0
1
0
0
0
1
0
0
1
0
0
0
0
1
1
0
0
0
0
) and CRT
16
16
4-21
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